[CentOS] Bypassing firewall alternatives

Wei Yu wrote:
> I am experiencing a problem of bypassing firewalls.
> I know that "ssh -R" can forward ports from remote server to local 
> ports. But it requires an account of the remote server, which seems to 
> be a security hole.
> I am looking for other programs which can do so, any suggestions?


I don't know any way you could forward a port from a remote host to 
anywhere without authenticating on said remote host.    

I'm not quite sure why you consider the existance of an account to be a 
security hole ?  you could configure an account that won't allow an 
interactive login (shell set to /bin/false), and JUST do port 
forwarding, using -N on the ssh command.