10 July 2014

Защищаем роутер от пользователя с помощью dd-wrt

Configuring Linux
Провайдер у которого я отбываю рабочую повинность выдаёт абонентам маршрутизаторы в безвозмездное пользование на период заключения договора. При выдаче роутера механики прошивают его, внося логин, пароль, ip и настраивая wifi. И всё бы ничего, но попадаются особо умные пользователи, которые любят понастраивать девайс, да и на маршрутизаторах есть кнопка сброса к заводским настройкам, после манипуляций с которой либо абонент ехал в офис, либо механик выезжал к абоненту заново настраивать устройство. Чаша терпения полнилась и последней каплей стал TL-WR841N, которых провайдер закупил крупную партию.
Мало того что педалька сброса не утоплена (а наоборот расположена так, что может быть нажата перекрученным кабелем да и просто хламом в котором иногда оказываются абонентские устройства) так ещё производитель совместил WPS и RESET на одной кнопке, что мягко говоря чуднОе решение.
image
Был ещё один болезненный момент — с родной прошивкой TP-Link'a роутер не всегда восстанавливал соединение после обрыва связи.
Конечно, и наше решение имеет свои минусы, как-то невозможность смены паролей, но с этим мы готовы мириться.
Ну чтож… Начинаем «лечение».

Я не питаю большой любви к линуксу, но завести весь нужный инструментарий под FreeBSD с ходу не удалось, да и в предверии ковыряния в исходниках прошивки заточенной под линукс сильно экспериментировать на фряшке не хотелось, поэтому всё нижеописанное делается под
# uname -a
Linux debian64 3.2.0-4-amd64 #1 SMP Debian 3.2.60-1+deb7u1 x86_64 GNU/Linux

Важным нюансом является x86_64, но о нём позже.
Конечная наша задач — залить прошивку в маршрутизатор по умолчанию содержащую данные пользователя, которые будут восстановлены после сброса в заводские настройки. Попутно решаем проблему с восстановлением соединения после обрыва связи. Последняя проблема не возникает на dd-wrt, а наличие исходных кодов делает её особенно привлекательной.
Для начала просто выбираем прошивку под нашу ревизию. Заливаем в роутер, делаем тестовые настройки и ищем где-же они хранятся. Немножко поgrepав
root@DD-WRT:~# grep -rn test00 /etc
/etc/defaults.bin:160:
ppp_usernametest001
root@DD-WRT:~#

выясняем, что хранятся они в файлике /etc/defaults.bin, который и будем править. Именно из него дёргаются настройки по умолчанию. Немного погуглив находим варианты правки его hex-редактором, но извращаться с hex-editor'ом имея исходники не наш метод. Путей у нас три:
— собрать всю прошивку из исходников;
— собрать из исходников только defaults.bin и разобрав исходную прошивку подменить его;
— создать defaults.bin самому и опять же подменить в исходной прошивке.
Все варианты жизнеспособны, и хотя мы пойдём по 3-му пути, коснёмся 2-х первых также. Для того чтобы сделать прошивку из исходников надо помнить, что собирать нужно под архитектуру процессора, в нашем случае MIPS, при этом мы автоматически попадаем на геморрой с кросс-компиляцией. Для этого на сайте dd-wrt есть подготовленные toolchain'ы, но всё ссылки на них отвечают «404 Not Found». Найти-таки их удалось — ftp.dd-wrt.com/toolchains/toolchains.tar.xz.
N.B.: все тулчейны собраны под x86_64, именно поэтому систему для опытов лучше изначально ставить x86_64
Останавливаться на кросс-компиляции не будем, эта тема освещена в wiki dd-wrt

Но идём своей дорогой. Начинаем с разборки прошивки.
Скачиваем Firmware Modification Kit
# git clone https://code.google.com/p/firmware-mod-kit/

Разбираем нашу прошивку
# firmware-mod-kit/extract-firmware.sh tl-wr841nd-webflash.bin ./working_directory/

Теперь займёмся подготовкой нашего defaults.bin.
Получаем исходники dd-wrt
# svn co svn://svn.dd-wrt.com/DD-WRT

Собственно, из всех исходников нам нужно лишь 2 файла
# find ./src/router/services/ -name defaults.c
./src/router/services/sysinit/defaults.c
./src/router/services/bin/defaults.c

Первый из которых содержит заполненную структуру srouter_defaults, а второй загоняет её в defaults.bin.
Модифицируем эти файлики под себя:
Структура:
defaults.c
#include <epivers.h>
#include <string.h>
#include <bcmnvram.h>
#include <typedefs.h>
#include <wlioctl.h>
#include <stdio.h>
#include <ezc.h>

#include <code_pattern.h>
#include <cy_conf.h>

struct nvram_tuple srouter_defaults[] = {
{"nvram_ver", "3", 0},
{"router_style", "elegant", 0},
{"os_name", "", 0},
{"os_version", "4.150.10.5", 0},
{"os_date", "Jul  9 2014", 0},
{"ct_modules", "", 0},
{"wait_time", "5", 0},
{"timer_interval", "3600", 0},
{"time_zone", "Europe/Minsk", 0},
{"ntp_server", "", 0},
{"refresh_time", "3", 0},
{"auth_limit", "180", 0},
{"log_level", "0", 0},
{"ezc_enable", "1", 0},
{"ezc_version", "2", 0},
{"is_default", "1", 0},
{"os_server", "", 0},
{"stats_server", "", 0},
{"console_loglevel", "7", 0},
{"fw_disable", "0", 0},
{"log_enable", "0", 0},
{"log_ipaddr", "0", 0},
{"lan_ifname", "", 0},
{"lan_ifnames", "", 0},
{"lan_hwnames", "", 0},
{"lan_hwaddr", "", 0},
{"wl0_ifname", "eth1", 0},
{"lan_proto", "dhcp", 0},
{"lan_ipaddr", "192.168.1.1", 0},
{"lan_netmask", "255.255.255.0", 0},
{"lan_gateway", "0.0.0.0", 0},
{"sv_localdns", "0.0.0.0", 0},
{"lan_stp", "0", 0},
{"lan_wins", "", 0},
{"lan_domain", "", 0},
{"lan_lease", "86400", 0},
{"wan_dial", "0", 0},
{"wan_ifname", "", 0},
{"wan_ifname2", "", 0},
{"wan_ifnames", "", 0},
{"wan_default", "", 0},
{"wan_hwname", "", 0},
{"wan_hwaddr", "", 0},
{"wan_vdsl", "0", 0},
{"dtag_vlan8", "0", 0},
{"wan_proto", "pptp", 0},
{"wan_ipaddr", "10.34.1.231", 0},
{"wan_netmask", "255.255.240.0", 0},
{"wan_gateway", "10.34.1.1", 0},
{"pptp_wan_gateway", "10.34.1.1", 0},
{"l2tp_wan_gateway", "0.0.0.0", 0},
{"wan_dns", "77.88.8.8 8.8.8.8 8.8.4.4", 0},
{"wan_wins", "0.0.0.0", 0},
{"wan_dualaccess", "1", 0},
{"wan_hostname", "", 0},
{"wan_domain", "", 0},
{"wan_lease", "86400", 0},
{"static_route", "", 0},
{"static_route_name", "", 0},
{"ses_enable", "1", 0},
{"ses_event", "2", 0},
{"ses_button", "0", 0},
{"ses_script", "", 0},
{"wan_primary", "1", 0},
{"wan_unit", "0", 0},
{"filter_maclist", "", 0},
{"filter_macmode", "deny", 0},
{"filter_client0", "", 0},
{"filter_port", "", 0},
{"filter_rule1", "", 0},
{"filter_rule2", "", 0},
{"filter_rule3", "", 0},
{"filter_rule4", "", 0},
{"filter_rule5", "", 0},
{"filter_rule6", "", 0},
{"filter_rule7", "", 0},
{"filter_rule8", "", 0},
{"filter_rule9", "", 0},
{"filter_rule10", "", 0},
{"filter_tod1", "", 0},
{"filter_tod2", "", 0},
{"filter_tod3", "", 0},
{"filter_tod4", "", 0},
{"filter_tod5", "", 0},
{"filter_tod6", "", 0},
{"filter_tod7", "", 0},
{"filter_tod8", "", 0},
{"filter_tod9", "", 0},
{"filter_tod10", "", 0},
{"filter_tod_buf1", "", 0},
{"filter_tod_buf2", "", 0},
{"filter_tod_buf3", "", 0},
{"filter_tod_buf4", "", 0},
{"filter_tod_buf5", "", 0},
{"filter_tod_buf6", "", 0},
{"filter_tod_buf7", "", 0},
{"filter_tod_buf8", "", 0},
{"filter_tod_buf9", "", 0},
{"filter_tod_buf10", "", 0},
{"filter_ip_grp1", "", 0},
{"filter_ip_grp2", "", 0},
{"filter_ip_grp3", "", 0},
{"filter_ip_grp4", "", 0},
{"filter_ip_grp5", "", 0},
{"filter_ip_grp6", "", 0},
{"filter_ip_grp7", "", 0},
{"filter_ip_grp8", "", 0},
{"filter_ip_grp9", "", 0},
{"filter_ip_grp10", "", 0},
{"filter_mac_grp1", "", 0},
{"filter_mac_grp2", "", 0},
{"filter_mac_grp3", "", 0},
{"filter_mac_grp4", "", 0},
{"filter_mac_grp5", "", 0},
{"filter_mac_grp6", "", 0},
{"filter_mac_grp7", "", 0},
{"filter_mac_grp8", "", 0},
{"filter_mac_grp9", "", 0},
{"filter_mac_grp10", "", 0},
{"filter_web_host1", "", 0},
{"filter_web_host2", "", 0},
{"filter_web_host3", "", 0},
{"filter_web_host4", "", 0},
{"filter_web_host5", "", 0},
{"filter_web_host6", "", 0},
{"filter_web_host7", "", 0},
{"filter_web_host8", "", 0},
{"filter_web_host9", "", 0},
{"filter_web_host10", "", 0},
{"filter_web_host11", "", 0},
{"filter_web_host12", "", 0},
{"filter_web_host13", "", 0},
{"filter_web_host14", "", 0},
{"filter_web_url1", "", 0},
{"filter_web_url2", "", 0},
{"filter_web_url3", "", 0},
{"filter_web_url4", "", 0},
{"filter_web_url5", "", 0},
{"filter_web_url6", "", 0},
{"filter_web_url7", "", 0},
{"filter_web_url8", "", 0},
{"filter_web_url9", "", 0},
{"filter_web_url10", "", 0},
{"filter_web_url11", "", 0},
{"filter_web_url12", "", 0},
{"filter_web_url13", "", 0},
{"filter_web_url14", "", 0},
{"filter_web_url15", "", 0},
{"filter_port_grp1", "", 0},
{"filter_port_grp2", "", 0},
{"filter_port_grp3", "", 0},
{"filter_port_grp4", "", 0},
{"filter_port_grp5", "", 0},
{"filter_port_grp6", "", 0},
{"filter_port_grp7", "", 0},
{"filter_port_grp8", "", 0},
{"filter_port_grp9", "", 0},
{"filter_port_grp10", "", 0},
{"filter_dport_grp1", "", 0},
{"filter_dport_grp2", "", 0},
{"filter_dport_grp3", "", 0},
{"filter_dport_grp4", "", 0},
{"filter_dport_grp5", "", 0},
{"filter_dport_grp6", "", 0},
{"filter_dport_grp7", "", 0},
{"filter_dport_grp8", "", 0},
{"filter_dport_grp9", "", 0},
{"filter_dport_grp10", "", 0},
{"filter_services", "", 0},
{"filter_services_1", "", 0},
{"dmz_enable", "0", 0},
{"dmz_ipaddr", "0", 0},
{"autofw_port0", "", 0},
{"dhcp_start", "100", 0},
{"dhcp_num", "50", 0},
{"dhcp_lease", "1440", 0},
{"dhcp_domain", "wan", 0},
{"dhcp_wins", "wan", 0},
{"wan_get_dns", "", 0},
{"remote_ip_any", "0", 0},
{"remote_ip", "123.123.123.1 254", 0},
{"http_wanport", "8080", 0},
{"http_lanport", "80", 0},
{"http_enable", "1", 0},
{"http_method", "post", 0},
{"wl0_web_filter", "0", 0},
{"wl1_web_filter", "0", 0},
{"pppoe_ifname", "", 0},
{"ppp_username", "test001", 0},
{"ppp_passwd", "pass001", 0},
{"ppp_idletime", "5", 0},
{"ppp_keepalive", "0", 0},
{"ppp_demand", "0", 0},
{"ppp_redialperiod", "30", 0},
{"ppp_service", "", 0},
{"ppp_ac", "", 0},
{"ppp_static", "0", 0},
{"ppp_static_ip", "", 0},
{"ppp_get_ac", "", 0},
{"ppp_get_srv", "", 0},
{"ppp_compression", "0", 0},
{"ppp_mppe", "", 0},
{"ppp_mlppp", "0", 0},
{"wl0_nbw_cap", "1", 0},
{"wl1_nbw_cap", "1", 0},
{"wl0_nbw", "20", 0},
{"wl1_nbw", "20", 0},
{"wl0_bw_cap", "255", 0},
{"wl1_bw_cap", "255", 0},
{"wl0_nctrlsb", "lower", 0},
{"wl1_nctrlsb", "lower", 0},
{"wl0_nband", "0", 0},
{"wl1_nband", "0", 0},
{"wl0_nmcsidx", "-1", 0},
{"wl1_nmcsidx", "-1", 0},
{"wl0_nmode", "-1", 0},
{"wl1_nmode", "-1", 0},
{"wl0_nreqd", "0", 0},
{"wl1_nreqd", "0", 0},
{"wl0_vlan_prio_mode", "off", 0},
{"wl1_vlan_prio_mode", "off", 0},
{"wl0_leddc", "0x640000", 0},
{"wl_rxstreams", "0", 0},
{"wl_txstreams", "0", 0},
{"wl0_sta_retry_time", "5", 0},
{"wl_distance", "2000", 0},
{"wl_ifname", "", 0},
{"wl_hwaddr", "", 0},
{"wl_phytype", "g", 0},
{"wl_corerev", "", 0},
{"wl_phytypes", "", 0},
{"wl_radioids", "", 0},
{"wl_shortslot", "auto", 0},
{"wl1_shortslot", "auto", 0},
{"wl_ssid", "Nord dd-wrt", 0},
{"wl0_ssid", "Nord dd-wrt", 0},
{"wl1_ssid", "Nord dd-wrt", 0},
{"wl0.1_ssid", "", 0},
{"wl0.2_ssid", "", 0},
{"wl0.3_ssid", "", 0},
{"wl0_bridged", "1", 0},
{"wl0.1_bridged", "1", 0},
{"wl0.2_bridged", "1", 0},
{"wl0.3_bridged", "1", 0},
{"wl0_ipaddr", "0.0.0.0", 0},
{"wl0.1_ipaddr", "0.0.0.0", 0},
{"wl0.2_ipaddr", "0.0.0.0", 0},
{"wl0.3_ipaddr", "0.0.0.0", 0},
{"wl0_netmask", "0.0.0.0", 0},
{"wl0.1_netmask", "0.0.0.0", 0},
{"wl0.2_netmask", "0.0.0.0", 0},
{"wl0.3_netmask", "0.0.0.0", 0},
{"wl_radio", "1", 0},
{"wl0_radio", "1", 0},
{"wl0_closed", "0", 0},
{"wl0.1_closed", "0", 0},
{"wl0.2_closed", "0", 0},
{"wl0.3_closed", "0", 0},
{"wl_ap_isolate", "0", 0},
{"wl1_ap_isolate", "0", 0},
{"wl_mode", "ap", 0},
{"wl0_mode", "ap", 0},
{"wl1_mode", "ap", 0},
{"wl_lazywds", "0", 0},
{"wl_wds", "", 0},
{"wl_wep", "disabled", 0},
{"wl_crypto", "off", 0},
{"wl_auth", "0", 0},
{"wl0_crypto", "tkip+aes", 0},
{"ath0_crypto", "tkip+aes", 0},
{"wl0_auth", "0", 0},
{"wl1_auth", "0", 0},
{"wl0_key", "1", 0},
{"wl0_key1", "", 0},
{"wl0_key2", "", 0},
{"wl0_key3", "", 0},
{"wl0_key4", "", 0},
{"wl0.1_crypto", "off", 0},
{"wl0.1_auth", "0", 0},
{"wl0.1_key", "1", 0},
{"wl0.1_key1", "", 0},
{"wl0.1_key2", "", 0},
{"wl0.1_key3", "", 0},
{"wl0.1_key4", "", 0},
{"wl0.2_crypto", "off", 0},
{"wl0.2_auth", "0", 0},
{"wl0.2_key", "1", 0},
{"wl0.2_key1", "", 0},
{"wl0.2_key2", "", 0},
{"wl0.2_key3", "", 0},
{"wl0.2_key4", "", 0},
{"wl0.3_crypto", "off", 0},
{"wl0.3_auth", "0", 0},
{"wl0.3_key", "1", 0},
{"wl0.3_key1", "", 0},
{"wl0.3_key2", "", 0},
{"wl0.3_key3", "", 0},
{"wl0.3_key4", "", 0},
{"wl_macmode", "disabled", 0},
{"wl_macmode1", "disabled", 0},
{"wl0_channel", "6", 0},
{"wl_reg_mode", "off", 0},
{"wl_dfs_preism", "60", 0},
{"wl_dfs_postism", "60", 0},
{"wl_rate", "0", 0},
{"wl1_rate", "0", 0},
{"wl_mrate", "0", 0},
{"wl_rateset", "default", 0},
{"wl1_rateset", "default", 0},
{"wl_frag", "2346", 0},
{"wl1_frag", "2346", 0},
{"wl_rts", "2347", 0},
{"wl1_rts", "2347", 0},
{"wl_dtim", "1", 0},
{"wl1_dtim", "1", 0},
{"wl_bcn", "100", 0},
{"wl1_bcn", "100", 0},
{"wl_plcphdr", "long", 0},
{"wl1_plcphdr", "long", 0},
{"wl_net_mode", "mixed", 0},
{"wl0_net_mode", "mixed", 0},
{"wl1_net_mode", "mixed", 0},
{"wl0_gmode", "1", 0},
{"wl_gmode_protection", "auto", 0},
{"wl1_gmode_protection", "auto", 0},
{"wl_nmode_protection", "auto", 0},
{"wl_frameburst", "off", 0},
{"wl1_frameburst", "off", 0},
{"wl_infra", "1", 0},
{"wl_passphrase", "", 0},
{"wl_wep_bit", "64", 0},
{"wl_wep_buf", "", 0},
{"wl_wep_gen", "", 0},
{"wl_wep_last", "", 0},
{"wl_active_mac", "", 0},
{"wl_mac_list", "", 0},
{"wl_mac_deny", "", 0},
{"security_mode", "disabled", 0},
{"security_mode_last", "", 0},
{"wl0_auth_mode", "disabled", 0},
//{"wl0_akm", "disabled", 0},
{"wl0_akm", "psk psk2", 0},
{"ath0_akm", "psk psk2", 0},
{"wl0_wpa_psk", "1234567890", 0},
{"ath0_wpa_psk", "1234567890", 0},
{"wl0_wpa_gtk_rekey", "3600", 0},
{"wl0_radius_port", "1812", 0},
{"wl0_radius_ipaddr", "", 0},
{"wl0_radius_key", "", 0},
{"wl0_security_mode", "psk2", 0},
{"ath0_security_mode", "psk2", 0},
{"wl0.1_auth_mode", "disabled", 0},
{"wl0.1_akm", "disabled", 0},
{"wl0.1_wpa_psk", "", 0},
{"wl0.1_wpa_gtk_rekey", "3600", 0},
{"wl0.1_radius_port", "1812", 0},
{"wl0.1_radius_ipaddr", "", 0},
{"wl0.1_radius_key", "", 0},
{"wl0.2_auth_mode", "disabled", 0},
{"wl0.2_akm", "disabled", 0},
{"wl0.2_wpa_psk", "", 0},
{"wl0.2_wpa_gtk_rekey", "3600", 0},
{"wl0.2_radius_port", "1812", 0},
{"wl0.2_radius_ipaddr", "", 0},
{"wl0.2_radius_key", "", 0},
{"wl0.3_auth_mode", "disabled", 0},
{"wl0.3_akm", "disabled", 0},
{"wl0.3_wpa_psk", "", 0},
{"wl0.3_wpa_gtk_rekey", "3600", 0},
{"wl0.3_radius_port", "1812", 0},
{"wl0.3_radius_ipaddr", "", 0},
{"wl0.3_radius_key", "", 0},
{"wl0_radius_override", "1", 0},
{"wl0_max_unauth_users", "0", 0},
{"wl0_radmacpassword", "0", 0},
{"wl_afterburner", "off", 0},
{"wl1_afterburner", "off", 0},
{"wl_unit", "0", 0},
{"restore_defaults", "0", 0},
{"router_name", "DD-WRT", 0},
{"ntp_mode", "auto", 0},
{"pptp_server_ip", "", 0},
{"pptp_get_ip", "", 0},
{"filter", "on", 0},
{"block_wan", "1", 0},
{"block_ident", "1", 0},
{"block_proxy", "0", 0},
{"block_java", "0", 0},
{"block_activex", "0", 0},
{"block_cookie", "0", 0},
{"block_multicast", "1", 0},
{"block_loopback", "0", 0},
{"block_snmp", "1", 0},
{"ipsec_pass", "1", 0},
{"pptp_pass", "1", 0},
{"l2tp_pass", "1", 0},
{"limit_ssh", "0", 0},
{"limit_telnet", "0", 0},
{"limit_pptp", "0", 0},
{"remote_management", "1", 0},
{"mtu_enable", "0", 0},
{"wan_mtu", "1500", 0},
{"forward_port", "", 0},
{"forward_spec", "", 0},
{"port_trigger", "", 0},
{"wk_mode", "gateway", 0},
{"dr_setting", "0", 0},
{"dr_lan_tx", "0", 0},
{"dr_lan_rx", "0", 0},
{"dr_wan_tx", "0", 0},
{"dr_wan_rx", "0", 0},
{"mac_clone_enable", "0", 0},
{"def_hwaddr", "00:00:00:00:00:00", 0},
{"port_swap", "0", 0},
{"ddns_enable", "0", 0},
{"ddns_wan_ip", "1", 0},
{"ddns_username", "", 0},
{"ddns_passwd", "", 0},
{"ddns_hostname", "", 0},
{"ddns_dyndnstype", "", 0},
{"ddns_wildcard", "", 0},
{"ddns_username_2", "", 0},
{"ddns_passwd_2", "", 0},
{"ddns_hostname_2", "", 0},
{"ddns_username_3", "", 0},
{"ddns_passwd_3", "", 0},
{"ddns_hostname_3", "", 0},
{"ddns_username_4", "", 0},
{"ddns_passwd_4", "", 0},
{"ddns_hostname_4", "", 0},
{"ddns_username_5", "", 0},
{"ddns_passwd_5", "", 0},
{"ddns_hostname_5", "", 0},
{"ddns_custom_5", "", 0},
{"ddns_conf", "", 0},
{"ddns_url", "", 0},
{"ddns_username_6", "", 0},
{"ddns_passwd_6", "", 0},
{"ddns_hostname_6", "", 0},
{"ddns_dyndnstype_6", "", 0},
{"ddns_wildcard_6", "", 0},
{"ddns_username_7", "", 0},
{"ddns_passwd_7", "", 0},
{"ddns_hostname_7", "", 0},
{"ddns_wildcard_7", "", 0},
{"ddns_username_8", "", 0},
{"ddns_passwd_8", "", 0},
{"ddns_hostname_8", "", 0},
{"ddns_enable_buf", "", 0},
{"ddns_username_buf", "", 0},
{"ddns_passwd_buf", "", 0},
{"ddns_hostname_buf", "", 0},
{"ddns_force", "10", 0},
{"ddns_cache", "", 0},
{"ddns_time", "", 0},
{"skip_amd_check", "0", 0},
{"skip_intel_check", "0", 0},
{"l2tp_use_dhcp", "1", 0},
{"l2tp_server_ip", "", 0},
{"l2tp_server_name", "", 0},
{"l2tp_get_ip", "", 0},
{"l2tp_req_chap", "yes", 0},
{"l2tp_ref_pap", "yes", 0},
{"l2tp_req_auth", "yes", 0},
{"wan_gateway_buf", "0.0.0.0", 0},
{"hb_server_ip", "", 0},
{"hb_server_domain", "", 0},
{"samba_mount", "0", 0},
{"rflow_enable", "0", 0},
{"info_passwd", "0", 0},
{"macupd_enable", "0", 0},
{"wl_radauth", "0", 0},
{"rc_startup", "", 0},
{"rc_firewall", "", 0},
{"rc_custom", "", 0},
{"rc_shutdown", "", 0},
{"wl0_txpwr", "71", 0},
{"wl1_txpwr", "71", 0},
{"wl0_txant", "3", 0},
{"wl0_antdiv", "3", 0},
{"wl1_txant", "3", 0},
{"wl1_antdiv", "3", 0},
{"apwatchdog_enable", "0", 0},
{"apwatchdog_interval", "15", 0},
{"boot_wait", "on", 0},
{"cron_enable", "1", 0},
{"cron_jobs", "", 0},
{"dhcpd_options", "", 0},
{"dhcpd_usenvram", "0", 0},
{"local_dns", "0", 0},
{"dnsmasq_no_dns_rebind", "1", 0},
{"dnsmasq_enable", "1", 0},
{"dnsmasq_options", "", 0},
{"nas_enable", "1", 0},
{"ntp_enable", "1", 0},
{"pptpd_enable", "0", 0},
{"pptpd_forcemppe", "1", 0},
{"pptpd_bcrelay", "0", 0},
{"pptpd_lip", "", 0},
{"pptpd_rip", "", 0},
{"pptpd_auth", "", 0},
{"pptpd_radius", "0", 0},
{"pptpd_radserver", "0.0.0.0", 0},
{"pptpd_radport", "1812", 0},
{"pptpd_acctport", "1813", 0},
{"pptpd_radpass", "", 0},
{"pptpd_conn", "64", 0},
{"pptp_reorder", "0", 0},
{"pptp_iptv", "0", 0},
{"pptp_extraoptions", "", 0},
{"pptpd_mtu", "1436", 0},
{"pptpd_mru", "1436", 0},
{"pptp_encrypt", "0", 0},
{"resetbutton_enable", "1", 0},
{"telnetd_enable", "1", 0},
{"ipv6_enable", "0", 0},
{"radvd_enable", "0", 0},
{"radvd_conf", "", 0},
{"remote_mgt_telnet", "1", 0},
{"telnet_wanport", "23", 0},
{"syslogd_enable", "0", 0},
{"syslogd_rem_ip", "", 0},
{"wl0_wds1_enable", "0", 0},
{"wl0_wds2_enable", "0", 0},
{"wl0_wds3_enable", "0", 0},
{"wl0_wds4_enable", "0", 0},
{"wl0_wds5_enable", "0", 0},
{"wl0_wds6_enable", "0", 0},
{"wl0_wds7_enable", "0", 0},
{"wl0_wds8_enable", "0", 0},
{"wl0_wds9_enable", "0", 0},
{"wl0_wds10_enable", "0", 0},
{"wl0_wds1_hwaddr", "", 0},
{"wl0_wds2_hwaddr", "", 0},
{"wl0_wds3_hwaddr", "", 0},
{"wl0_wds4_hwaddr", "", 0},
{"wl0_wds5_hwaddr", "", 0},
{"wl0_wds6_hwaddr", "", 0},
{"wl0_wds7_hwaddr", "", 0},
{"wl0_wds8_hwaddr", "", 0},
{"wl0_wds9_hwaddr", "", 0},
{"wl0_wds10_hwaddr", "", 0},
{"wl0_wds1_ipaddr", "", 0},
{"wl0_wds2_ipaddr", "", 0},
{"wl0_wds3_ipaddr", "", 0},
{"wl0_wds4_ipaddr", "", 0},
{"wl0_wds5_ipaddr", "", 0},
{"wl0_wds6_ipaddr", "", 0},
{"wl0_wds7_ipaddr", "", 0},
{"wl0_wds8_ipaddr", "", 0},
{"wl0_wds9_ipaddr", "", 0},
{"wl0_wds10_ipaddr", "", 0},
{"wl0_wds1_netmask", "", 0},
{"wl0_wds2_netmask", "", 0},
{"wl0_wds3_netmask", "", 0},
{"wl0_wds4_netmask", "", 0},
{"wl0_wds5_netmask", "", 0},
{"wl0_wds6_netmask", "", 0},
{"wl0_wds7_netmask", "", 0},
{"wl0_wds8_netmask", "", 0},
{"wl0_wds9_netmask", "", 0},
{"wl0_wds10_netmask", "", 0},
{"wl0_wds1_desc", "", 0},
{"wl0_wds2_desc", "", 0},
{"wl0_wds3_desc", "", 0},
{"wl0_wds4_desc", "", 0},
{"wl0_wds5_desc", "", 0},
{"wl0_wds6_desc", "", 0},
{"wl0_wds7_desc", "", 0},
{"wl0_wds8_desc", "", 0},
{"wl0_wds9_desc", "", 0},
{"wl0_wds10_desc", "", 0},
{"wl0_wds1_ospf", "", 0},
{"wl0_wds2_ospf", "", 0},
{"wl0_wds3_ospf", "", 0},
{"wl0_wds4_ospf", "", 0},
{"wl0_wds5_ospf", "", 0},
{"wl0_wds6_ospf", "", 0},
{"wl0_wds7_ospf", "", 0},
{"wl0_wds8_ospf", "", 0},
{"wl0_wds9_ospf", "", 0},
{"wl0_wds10_ospf", "", 0},
{"wl1_wds1_enable", "0", 0},
{"wl1_wds2_enable", "0", 0},
{"wl1_wds3_enable", "0", 0},
{"wl1_wds4_enable", "0", 0},
{"wl1_wds5_enable", "0", 0},
{"wl1_wds6_enable", "0", 0},
{"wl1_wds7_enable", "0", 0},
{"wl1_wds8_enable", "0", 0},
{"wl1_wds9_enable", "0", 0},
{"wl1_wds10_enable", "0", 0},
{"wl1_wds1_hwaddr", "", 0},
{"wl1_wds2_hwaddr", "", 0},
{"wl1_wds3_hwaddr", "", 0},
{"wl1_wds4_hwaddr", "", 0},
{"wl1_wds5_hwaddr", "", 0},
{"wl1_wds6_hwaddr", "", 0},
{"wl1_wds7_hwaddr", "", 0},
{"wl1_wds8_hwaddr", "", 0},
{"wl1_wds9_hwaddr", "", 0},
{"wl1_wds10_hwaddr", "", 0},
{"wl1_wds1_ipaddr", "", 0},
{"wl1_wds2_ipaddr", "", 0},
{"wl1_wds3_ipaddr", "", 0},
{"wl1_wds4_ipaddr", "", 0},
{"wl1_wds5_ipaddr", "", 0},
{"wl1_wds6_ipaddr", "", 0},
{"wl1_wds7_ipaddr", "", 0},
{"wl1_wds8_ipaddr", "", 0},
{"wl1_wds9_ipaddr", "", 0},
{"wl1_wds10_ipaddr", "", 0},
{"wl1_wds1_netmask", "", 0},
{"wl1_wds2_netmask", "", 0},
{"wl1_wds3_netmask", "", 0},
{"wl1_wds4_netmask", "", 0},
{"wl1_wds5_netmask", "", 0},
{"wl1_wds6_netmask", "", 0},
{"wl1_wds7_netmask", "", 0},
{"wl1_wds8_netmask", "", 0},
{"wl1_wds9_netmask", "", 0},
{"wl1_wds10_netmask", "", 0},
{"wl1_wds1_desc", "", 0},
{"wl1_wds2_desc", "", 0},
{"wl1_wds3_desc", "", 0},
{"wl1_wds4_desc", "", 0},
{"wl1_wds5_desc", "", 0},
{"wl1_wds6_desc", "", 0},
{"wl1_wds7_desc", "", 0},
{"wl1_wds8_desc", "", 0},
{"wl1_wds9_desc", "", 0},
{"wl1_wds10_desc", "", 0},
{"wl1_wds1_ospf", "", 0},
{"wl1_wds2_ospf", "", 0},
{"wl1_wds3_ospf", "", 0},
{"wl1_wds4_ospf", "", 0},
{"wl1_wds5_ospf", "", 0},
{"wl1_wds6_ospf", "", 0},
{"wl1_wds7_ospf", "", 0},
{"wl1_wds8_ospf", "", 0},
{"wl1_wds9_ospf", "", 0},
{"wl1_wds10_ospf", "", 0},
{"wl0_br1_enable", "0", 0},
{"wl0_br1_nat", "0", 0},
{"wl1_br1_enable", "0", 0},
{"wl1_br1_nat", "0", 0},
{"wl0_wds", "", 0},
{"wl0_wds0", "", 0},
{"wl0_wds1", "", 0},
{"wl0_wds2", "", 0},
{"wl0_wds3", "", 0},
{"wl0_wds4", "", 0},
{"wl0_wds5", "", 0},
{"wl0_wds6", "", 0},
{"wl0_wds7", "", 0},
{"wl0_wds8", "", 0},
{"wl0_wds9", "", 0},
{"wl1_wds", "", 0},
{"wl1_wds0", "", 0},
{"wl1_wds1", "", 0},
{"wl1_wds2", "", 0},
{"wl1_wds3", "", 0},
{"wl1_wds4", "", 0},
{"wl1_wds5", "", 0},
{"wl1_wds6", "", 0},
{"wl1_wds7", "", 0},
{"wl1_wds8", "", 0},
{"wl1_wds9", "", 0},
{"wl0_wds0_if", "", 0},
{"wl0_wds1_if", "", 0},
{"wl0_wds2_if", "", 0},
{"wl0_wds3_if", "", 0},
{"wl0_wds4_if", "", 0},
{"wl0_wds5_if", "", 0},
{"wl0_wds6_if", "", 0},
{"wl0_wds7_if", "", 0},
{"wl0_wds8_if", "", 0},
{"wl0_wds9_if", "", 0},
{"wl0_wds10_if", "", 0},
{"wl1_wds0_if", "", 0},
{"wl1_wds1_if", "", 0},
{"wl1_wds2_if", "", 0},
{"wl1_wds3_if", "", 0},
{"wl1_wds4_if", "", 0},
{"wl1_wds5_if", "", 0},
{"wl1_wds6_if", "", 0},
{"wl1_wds7_if", "", 0},
{"wl1_wds8_if", "", 0},
{"wl1_wds9_if", "", 0},
{"wl1_wds10_if", "", 0},
{"wds0.1", "", 0},
{"wds0.2", "", 0},
{"wds0.3", "", 0},
{"wds0.4", "", 0},
{"wds0.5", "", 0},
{"wds0.6", "", 0},
{"wds0.7", "", 0},
{"wds0.8", "", 0},
{"wds0.9", "", 0},
{"wds0.10", "", 0},
{"wds0.11", "", 0},
{"wds0.12", "", 0},
{"wds0.13", "", 0},
{"wds0.14", "", 0},
{"wds0.15", "", 0},
{"wds0.16", "", 0},
{"wds1.1", "", 0},
{"wds1.2", "", 0},
{"wds1.3", "", 0},
{"wds1.4", "", 0},
{"wds1.5", "", 0},
{"wds1.6", "", 0},
{"wds1.7", "", 0},
{"wds1.8", "", 0},
{"wds1.9", "", 0},
{"wds1.10", "", 0},
{"wds1.11", "", 0},
{"wds1.12", "", 0},
{"wds1.13", "", 0},
{"wds1.14", "", 0},
{"wds1.15", "", 0},
{"wds1.16", "", 0},
{"wshaper_enable", "0", 0},
{"wshaper_dev", "WAN", 0},
{"wshaper_downlink", "0", 0},
{"wshaper_uplink", "0", 0},
{"wshaper_nopriohostsrc", "", 0},
{"wshaper_nopriohostdst", "", 0},
{"wshaper_noprioportsrc", "", 0},
{"wshaper_noprioportdst", "", 0},
{"zebra_enable", "1", 0},
{"qos_type", "0", 0},
{"svqos_svcs", "", 0},
{"svqos_ips", "", 0},
{"svqos_macs", "", 0},
{"svqos_port1bw", "FULL", 0},
{"svqos_port2bw", "FULL", 0},
{"svqos_port3bw", "FULL", 0},
{"svqos_port4bw", "FULL", 0},
{"svqos_port1prio", "10", 0},
{"svqos_port2prio", "10", 0},
{"svqos_port3prio", "10", 0},
{"svqos_port4prio", "10", 0},
{"wol_enable", "0", 0},
{"wol_interval", "86400", 0},
{"wol_hostname", "", 0},
{"wol_macs", "", 0},
{"wol_passwd", "", 0},
{"hs_enable", "", 0},
{"hs_exempt", "", 0},
{"hs_urls", "", 0},
{"hs_redirect", "", 0},
{"hs_html", "", 0},
{"hs_image", "", 0},
{"def_whwaddr", "00:00:00:00:00:00", 0},
{"sv_restore_defaults", "0", 0},
{"ospfd_conf", "", 0},
{"zebra_conf", "", 0},
{"ospfd_copt", "0", 0},
{"zebra_copt", "0", 0},
{"zebra_log", "0", 0},
{"dyn_default", "0", 0},
{"altdns1", "", 0},
{"altdns2", "", 0},
{"altdns3", "", 0},
{"log_accepted", "0", 0},
{"log_dropped", "0", 0},
{"log_rejected", "0", 0},
{"port0vlans", "1", 0},
{"port1vlans", "0", 0},
{"port2vlans", "0", 0},
{"port3vlans", "0", 0},
{"port4vlans", "0", 0},
{"port5vlans", "0 1 16", 0},
{"vlans", "0", 0},
{"trunking", "0", 0},
{"manual_boot_nv", "0", 0},
{"status_auth", "1", 0},
{"ipv6_enable", "0", 0},
{"enable_jffs2", "0", 0},
{"clean_jffs2", "0", 0},
{"sys_enable_jffs2", "0", 0},
{"language", "russian", 0},
{"macupd_ip", "0.0.0.0", 0},
{"macupd_port", "2056", 0},
{"macupd_interval", "10", 0},
{"mmc_enable", "0", 0},
{"mmc_enable0", "0", 0},
{"ip_conntrack_max", "4096", 0},
{"ip_conntrack_tcp_timeouts", "3600", 0},
{"ip_conntrack_udp_timeouts", "120", 0},
{"rflow_ip", "0.0.0.0", 0},
{"rflow_port", "2055", 0},
{"rflow_if", "br0", 0},
{"schedule_enable", "0", 0},
{"schedule_time", "3600", 0},
{"schedule_hour_time", "1", 0},
{"schedule_minutes", "0", 0},
{"schedule_hours", "0", 0},
{"schedule_weekdays", "00", 0},
{"smtp_redirect_enable", "0", 0},
{"smtp_redirect_destination", "0.0.0.0", 0},
{"smtp_source_network", "0.0.0.0", 0},
{"wds_watchdog_enable", "0", 0},
{"wds_watchdog_interval_sec", "1000", 0},
{"wds_watchdog_ips", "", 0},
{"dhcpfwd_enable", "0", 0},
{"dhcpfwd_ip", "0.0.0.0", 0},
{"NC_enable", "0", 0},
{"NC_GatewayName", "DD-WRT", 0},
{"NC_HomePage", "http://www.dd-wrt.com", 0},
{"NC_ExcludePorts", "25", 0},
{"NC_IncludePorts", "", 0},
{"NC_Verbosity", "2", 0},
{"NC_LoginTimeout", "86400", 0},
{"NC_AllowedWebHosts", "", 0},
{"NC_RouteOnly", "0", 0},
{"NC_DocumentRoot", "/www", 0},
{"NC_SplashURL", "", 0},
{"NC_SplashURLTimeout", "21600", 0},
{"NC_MACWhiteList", "", 0},
{"NC_GatewayPort", "5280", 0},
{"NC_GatewayMode", "Open", 0},
{"NC_extifname", "auto", 0},
{"NC_ForcedRedirect", "0", 0},
{"NC_IdleTimeout", "0", 0},
{"NC_MaxMissedARP", "5", 0},
{"NC_RenewTimeout", "0", 0},
{"wl_wme", "on", 0},
{"wl1_wme", "on", 0},
{"wl_wme_sta_bk", "15 1023 7 0 0 off", 0},
{"wl_wme_sta_be", "15 1023 3 0 0 off", 0},
{"wl_wme_sta_vi", "7 15 2 6016 3008 off", 0},
{"wl_wme_sta_vo", "3 7 2 3264 1504 off", 0},
{"wl_wme_ap_bk", "15 1023 7 0 0 off", 0},
{"wl_wme_ap_be", "15 63 3 0 0 off", 0},
{"wl_wme_ap_vi", "7 15 1 6016 3008 off", 0},
{"wl_wme_ap_vo", "3 7 1 3264 1504 off", 0},
{"wl_wme_no_ack", "off", 0},
{"wl_wme_apsd", "on", 0},
{"wl1_wme_sta_bk", "15 1023 7 0 0 off", 0},
{"wl1_wme_sta_be", "15 1023 3 0 0 off", 0},
{"wl1_wme_sta_vi", "7 15 2 6016 3008 off", 0},
{"wl1_wme_sta_vo", "3 7 2 3264 1504 off", 0},
{"wl1_wme_ap_bk", "15 1023 7 0 0 off", 0},
{"wl1_wme_ap_be", "15 63 3 0 0 off", 0},
{"wl1_wme_ap_vi", "7 15 1 6016 3008 off", 0},
{"wl1_wme_ap_vo", "3 7 1 3264 1504 off", 0},
{"wl1_wme_no_ack", "off", 0},
{"wl1_wme_apsd", "on", 0},
{"wl_maxassoc", "128", 0},
{"wl1_maxassoc", "128", 0},
{"wl_wme_txp_be", "7 3 4 2 0", 0},
{"wl_wme_txp_bk", "7 3 4 2 0", 0},
{"wl_wme_txp_vi", "7 3 4 2 0", 0},
{"wl_wme_txp_vo", "7 3 4 2 0", 0},
{"wl1_wme_txp_be", "7 3 4 2 0", 0},
{"wl1_wme_txp_bk", "7 3 4 2 0", 0},
{"wl1_wme_txp_vi", "7 3 4 2 0", 0},
{"wl1_wme_txp_vo", "7 3 4 2 0", 0},
{"dhcp_dnsmasq", "1", 0},
{"dns_dnsmasq", "1", 0},
{"auth_dnsmasq", "1", 0},
{"pptp_use_dhcp", "0", 0},
{"pptp_server_name", "10.10.10.22", 0},
{"forward_entries", "0", 0},
{"forwardspec_entries", "0", 0},
{"trigger_entries", "0", 0},
{"sip_port", "5060", 0},
{"sip_domain", "192.168.1.1", 0},
{"static_leases", "", 0},
{"static_leasenum", "0", 0},
{"dhcpc_vendorclass", "", 0},
{"dhcpc_requestip", "", 0},
{"maskmac", "1", 0},
{"fullswitch", "0", 0},
{"upgrade_delay", "300", 0},
{"fon_enable", "0", 0},
{"pptpd_client_enable", "", 0},
{"pptpd_client_srvip", "", 0},
{"pptpd_client_srvsub", "", 0},
{"pptpd_client_srvsubmsk", "", 0},
{"pptpd_client_srvuser", "", 0},
{"pptpd_client_srvpass", "", 0},
{"pptpd_client_ipparam", "", 0},
{"pptpd_client_mtu", "1436", 0},
{"pptpd_client_mru", "1436", 0},
{"radio0_on_time", "111111111111111111111111", 0},
{"radio0_timer_enable", "0", 0},
{"radio1_on_time", "111111111111111111111111", 0},
{"radio1_timer_enable", "0", 0},
{"wifi_bonding", "0", 0},
{"wifi_display", "wl0", 0},
{"ttraff_enable", "1", 0},
{"ttraff_iface", "", 0},
{"reconnect_enable", "0", 0},
{"reconnect_hours", "0", 0},
{"reconnect_minutes", "0", 0},
{"warn_enabled", "0", 0},
{"warn_connlimit", "500", 0},
{"ptoken", "0", 0}
};


Структура достаточно понятна, недостающие элементы интуитивно-додумываемы, но особо непонятное можно отыскать обходным путём. Почти все имена элементов страниц веб-интерфейса совпадают с именами параметров нашей структуры, например, посмотрим код элемента хромом
image
Думаю комментарии излишни.

Сам формирователь
bin_defaults.c
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "./defaults.c"

static void
usage(void)
{
	const char *cmd = "make_defaults";
	fprintf(stderr,
		"Usage:\n"
		"%s arguments\n"
		"\t-u username		pptp username\n"
		"\t-p password		pptp user password\n"
		"\t-i ip\t		user LAN ip-assress\n"
		"\t-P password		WI-FI user password\n"
		"",
		cmd);

	exit(0);
}

//-----------------------------------------------------------------------------

int main(int argc, char *argv[])
{
	int ch;
	char username[32], password[32], ip[32], wifi_password[64];

	if(argc != 9) usage();
	while ( (ch = getopt(argc, argv, "u:p:i:P:")) != -1) {
		switch(ch) {
		default:
			printf("bad option %c %s\n", ch, optarg);
			usage();
			break;

		case 'u':
			strcpy(username, optarg);
			break;
		case 'p':
			strcpy(password, optarg);
			break;
		case 'i':
			strcpy(ip, optarg);
			break;
		case 'P':
			strcpy(wifi_password, optarg);
			break;
		}
	}


	FILE *out;
	out = fopen("defaults.bin", "wb");
	int i;
	int len = sizeof(srouter_defaults) / sizeof(struct nvram_tuple);
	fwrite(&len, 4, 1, out);
	int iSize = sizeof(srouter_defaults) / sizeof(struct nvram_tuple);
	for (i = 0; i < iSize; i++) {
		if (srouter_defaults[i].name) {
			if (strcmp(srouter_defaults[i].name, "ppp_username") == 0) 	srouter_defaults[i].value = username;
			if (strcmp(srouter_defaults[i].name, "ppp_passwd") == 0) 	srouter_defaults[i].value = password;
			if (strcmp(srouter_defaults[i].name, "wan_ipaddr") == 0) 	srouter_defaults[i].value = ip;
			if (strcmp(srouter_defaults[i].name, "ath0_wpa_psk") == 0) 	srouter_defaults[i].value = wifi_password;
			if (strcmp(srouter_defaults[i].name, "wl0_wpa_psk") == 0) 	srouter_defaults[i].value = wifi_password;
			
			//  /usr/bin/gcc /root/scripts/dd-wrt/c/bin_defaults.c -I/root/scripts/dd-wrt/DD-WRT/src/include.v24 -I /root/scripts/dd-wrt/DD-WRT/src/router/shared
			printf("{\"%s\", \"%s\", 0}", srouter_defaults[i].name, srouter_defaults[i].value);
			if(i+2 < iSize) printf(",");
			printf("\n");
			
			putc(strlen(srouter_defaults[i].name), out);
			fwrite(srouter_defaults[i].name,
			       strlen(srouter_defaults[i].name), 1, out);
			len = strlen(srouter_defaults[i].value);
			if (len > 127) {
				len |= 128;
				putc(len & 0xff, out);
				putc(strlen(srouter_defaults[i].value) >> 7,
				     out);
			} else {
				putc(len, out);
			}

			fwrite(srouter_defaults[i].value,
			       strlen(srouter_defaults[i].value), 1, out);
		} else {
			putc(0, out);
			putc(0, out);
		}

	}
	fclose(out);
	return 0;
}



Компиляем
# gcc /root/scripts/dd-wrt/c/bin_defaults.c -I/root/scripts/dd-wrt/DD-WRT/src/include.v24 -I /root/scripts/dd-wrt/DD-WRT/src/router/shared

Запускаем
# a.out  -u test001 -p 0123456 -i 10.34.1.231 -P 01234567890123456

Копируем полученный defaults.bin в нашу разобранную прошивку
# /bin/cp dd-wrt/c/defaults.bin dd-wrt/841/working_directory/rootfs/etc/defaults.bin

И
собираем её обратно
# dd-wrt/firmware-mod-kit/build-firmware.sh ./working_directory/

Firmware Mod Kit (build) 0.99, (c)2011-2013 Craig Heffner, Jeremy Collake

Building new squashfs file system... (this may take several minutes!)
Squashfs block size is 128 Kb
Creating big endian 3.0 filesystem on /root/scripts/dd-wrt/841/working_directory/new-filesystem.squashfs, block size 131072.

Big endian filesystem, data block size 131072, compressed data, compressed metadata, compressed fragments
Filesystem size 2753.71 Kbytes (2.69 Mbytes)
        34.09% of uncompressed filesystem size (8077.26 Kbytes)
Inode table size 4920 bytes (4.80 Kbytes)
        22.78% of uncompressed inode table size (21599 bytes)
Directory table size 6275 bytes (6.13 Kbytes)
        57.61% of uncompressed directory table size (10892 bytes)
Number of duplicate files found 0
Number of inodes 700
Number of files 446
Number of fragments 24
Number of symbolic links  189
Number of device nodes 0
Number of fifo nodes 0
Number of socket nodes 0
Number of directories 65
Number of uids 1
        root (0)
Number of gids 0
Remaining free bytes in firmware image: 126976
Processing 1 header(s) from /root/scripts/dd-wrt/841/working_directory/new-firmware.bin...
Processing header at offset 0...checksum(s) updated OK.
CRC(s) updated successfully.

Finished!
New firmware image has been saved to: /root/scripts/dd-wrt/841/working_directory/new-firmware.bin




Вуаля… Осталось залить прошивку в роутер.

UPD: Это дополнение появилось для тех, кто пишет комментарии в стиле «не читал, но осуждаю». При этом решении пользователь ничуть не пострадал. У него нет никаких ограничений в плане настроек. Он лишь получил возможность безнаказанно косячить и если накосячил, то сбросив роутер в ноль он получает доступ к сети без всяких настроек.
Tags:dd-wrt tp-link
Hubs: Configuring Linux
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