I got this error , I dont what is issue ?
sudo vpnc vpnc: Error binding to source port. Try '--local-port 0' Failed to bind to 0.0.0.0:4500: Address already in use
vpnc is sometimes a bit buggy. first, always check whether an instance of vpnc-connect or vpnc is running by doing:
if there is, kill it with kill and the process id you get on the second column.
i personally always use vpnc-connect instead of a direct call to vpnc (anyway afaik on most system, it's a symlink to vpnc).
could you post your config file? Located under /etc/vpnc/default.conf and /etc/vpnc.conf (remember that you cannot read them as normal user)
Sounds like something else is already using port 4500 try using netstat to find out what
If you want to see Routing Tables,all open ports,all listen ports
-n means return numeric output (ie, IP address instead of hostname)
-r means print the routing table
find all open ports
find listening ports
This just happened to me;
in my case reason was another vpn client installed (Shrew Soft Ike) and auto-starting at start-up.
Try to catch if some other vpn client is running (in my case, ps -e | grep ike), kill it and configure it to start only when required.