openwrt_sockd.md

Similar to the setup of Squid for HTTP proxy: https://gist.github.com/gmeeker/5e9af73fcf213c67cd86794f506520e6

OpenWRT can be used for SOCKS proxy as well using Dante. No custom builds are required, but some configuration files are currently missing.

opkg install sockd

Add /etc/init.d/sockd

#!/bin/sh /etc/rc.common
# Copyright (C) 2019 OpenWrt.org

USE_PROCD=1

START=90
STOP=10

PROG=/usr/sbin/sockd
USER="root"
GROUP="root"
PIDFILE=/var/run/sockd.pid
CONFFILE=/etc/sockd.conf

. /lib/functions.sh


start_service() {
	procd_open_instance
	procd_set_param command "$PROG" -f "$CONFFILE" -p "$PIDFILE"
	procd_set_param user "$USER"
	procd_set_param pidfile "$PIDFILE"
	procd_close_instance
}

chmod 755 /etc/init.d/sockd

ln -s ../init.d/sockd /etc/rc.d/S90sockd

Simple config with authentication (change external interface as needed)

logoutput: stderr
#debug: 1

internal: 0.0.0.0 port = 1080
external: eth1.2

user.privileged    : root
user.notprivileged : nobody

clientmethod: none
#socksmethod: none
socksmethod: username

client pass {
        from: 0.0.0.0/0 port 1-65535 to: 0.0.0.0/0
}

socks block {
        from: 0.0.0.0/0 to: 127.0.0.0/8
}

socks block {
        from: 0.0.0.0/0 to: 192.168.0.0/16
}

socks block {
        from: 0.0.0.0/0 to: 0.0.0.0/0
        command: bind
}

socks pass {
        from: 0.0.0.0/0 to: 0.0.0.0/0
        socksmethod: username
}

socks block {
        from: 0.0.0.0/0 to: 0.0.0.0/0
}

User accounts are used for authentication, but useradd is not installed. Edit /etc/passwd with:

username:x:500:500:nobody:/var:/bin/false

And /etc/shadow with this:

username:x:0:0:99999:7:::

Then

passwd username