In addition to the HTTP proxy, Net::SSH also supports SOCKS proxies (both versions 4 and 5). Their usage is almost identical to the HTTP version (except SOCKS4 does not use passwords, just user names):

[!figure lang=ruby,number=true,caption=Using SOCKS proxies 
require 'net/ssh'
require 'net/ssh/proxy/socks4'
require 'net/ssh/proxy/socks5'

proxy_host = 'my.proxy.com'
proxy_port = 1080
proxy_user = 'my-name'
proxy_password = 'my-password'

socks4 = Net::SSH::Proxy::SOCKS4.new( proxy_host, proxy_port,
            :user => proxy_user )

socks5 = Net::SSH::Proxy::SOCKS5.new( proxy_host, proxy_port,
            :user => proxy_user,
            :password => proxy_password)

Net::SSH.start( 'host', :proxy => socks4 ) do |session|
  ...
end
!]