Raconn

raconn takes hostnames and ips has arguments and will spawn threads to concurrenctly connects to all them, keeping the first successful connection and then pipe bytes through stdin/stdout.

It is written in C using cosmopolitan libc, some of the reason listed here:

• Run on all major oses with one binary
• Static binary
• Easy 'C' development thanks to sane api defaults
• Debug enviroment included

Debug

raconn --ftrace and ssh -vvv if using with ssh.

Example usage

1. You have a server with two ifaces one used for failover if you specify both ip to raconn, even in a failover situation your ssh command will succeed by connecting through the second iface and ip.

# ssh ip4failover
Host ip4failover
  ProxyCommand raconn %p 233.252.3.1 233.252.4.1
  Port 22
  User admin

2. You have a machine that is accessible on your local network and from the outside you only known the machine MAC address and its domain name which resolve to a WAN ip. Locally your are connected through both wifi and ethernet.

# ssh machine
Host machine.company
  ProxyCommand raconn %p machine.company.net 00:00:07:cf:10:0a
  Port 22
  User admin

3. You're trying to figuring out something and raconn is getting in the way.

# ssh -oProxyCommand=none machine
Host machine
  ProxyCommand raconn %p 2a00:1450:4007:81a::200e fe80::9e4f:642a:15c2:aad7
  Hostname 192.168.1.2 # this still works but is ignored when using ProxyCommand
  Port 22
  User admin

Todo

• mDns support