captive-browser-ubuntu-chrome.toml

# browser is the shell (/bin/sh) command executed once the proxy starts.
# When browser exits, the proxy exits. An extra env var PROXY is available.
#
# Here, we use a separate Chrome instance in Incognito mode, so that
# it can run (and be waited for) alongside the default one, and that
# it maintains no state across runs. To configure this browser open a
# normal window in it, settings will be preserved.
browser = """
    google-chrome \
    --user-data-dir="$HOME/.google-chrome-captive" \
    --proxy-server="socks5://$PROXY" \
    --host-resolver-rules="MAP * ~NOTFOUND , EXCLUDE localhost" \
    --no-first-run --new-window --incognito \
    http://example.com
"""

# dhcp-dns is the shell (/bin/sh) command executed to obtain the DHCP
# DNS server address. The first match of an IPv4 regex is used.
# IPv4 only, because let's be real, it's a captive portal.
#
# `wlp3s0` is your network interface (eth0, wlan0 ...)
#
dhcp-dns = "nmcli dev show | grep IP4.DNS"

# socks5-addr is the listen address for the SOCKS5 proxy server.
socks5-addr = "localhost:1666"