Hackable Socks 5 forward proxy (Router/Proxy forwarding)

Use this to manage your proxy servers - decide which proxy to use for which ip/domain name. For maximum flexibility this is done by "Configuration as Code" in a python proxy function. Work is based on this socks5 python toy server. Additionally you may also route traffic through a specified network interface/bypass the routing table from python code by implementing a router function. The last nice feature allows you to limit traffic to certain domains, e.g. netflix.com, or traffic generated by certain applications like youtube-dl.

create socks5 proxy to host using ssh

ssh -N -D ${portnumber} ${hostname}

File documentation

• requesthandler: socks5 proxy request handler, general class used to implement a proxy server.
• proxyforwarderserver: contains proxy function to proxy requests to other proxy servers dynamically.
• simpleserver: empty proxy function to resolve request from this machine and not chain to other proxies.
• applicationbandwidthlimiter: limit network traffic of curl/chrome/firefox. In addition implement a static routing table.
• bandwidthmonitor and valve are used to limit network traffic.
• domain to get ip address of domain
• process get process name from connection information
• sit_vpn_proxy_forwarder forwards connections to sit proxy if necessary
• sit_vpn_docker_proxy_forwarder forwards to proxy in docker to use vpn connection
• sit_local_proxy_forwarder.py same as vit_vpn_proxy_forwarder?

Proxychains-ng

To force the use of this proxy for all/some applications you may use proxychains-ng. My proxychains configuration file in ~/.proxychains/proxychains.conf looks like this:

# resolve dns via proxy
proxy_dns

# no output, add this if your proxy works fine to not mess up stdout/sterr of the running program
#quiet_mode

[ProxyList]
socks5 127.0.0.1 1080

Proxychains-ng for all applications

.zprofile or .profile file in home directory to always use proxychains through our socks5 proxy:

# default config file
#export PROXYCHAINS_CONF_FILE=/home/${username}/.proxychains/proxychains.conf
export LD_PRELOAD=/usr/lib/libproxychains4.so

Proxychains-ng as sudo

alias·sudoproxy="sudo·proxychains·-f·/home/${username}/.proxychains/proxychains.conf"

Proxychains-ng doesn't work for go applications

Use graftcp, may also fully replace proxychains-ng?

Proxychains-ng doesn't work for chrome/firefox

Set proxy manually in chrome/firefox settings.