On Mon, 12 Oct 2020 21:19:38 -0400 Viktor Dukhovni <postfix-us...@dukhovni.org> wrote:
> On Mon, Oct 12, 2020 at 08:09:45PM -0500, Ranjan Maitra wrote: > > > My apologies: were there any suggestions regarding what i should do? > > Find out more about the VPN. Nobody on this list can do that. Does it > support port forwarding (learn that means), and will it allow forwarding > of the internal SMTP server's IP:port to your client machine. Thank you very much, the SMTP port of the host is the standard 25. Is there a commandline way to quickly find out if the port is allowed to be forwarded? Otherwise, of course, I will wait for my IT staff to respond. > In that case all you need to do is set relayhost to the > forwarded SSH port: > > relayhost = [127.0.0.1]:<portnumber> > > but that requires your SSH VPN to support port forwarding from the > remote network to your machine, which it may restrict for security > reasons. You'd then need to run "ssh" with the relevant port > forwarded: > > localport=12345 # Forwarded SMTP service > relayhost=smtp.example.com > login=yourloginname > sshvpnport=22 # Perhaps different in your case > ssh -Nn -o "ExitOnForwardFailure yes" -l $login -p $vpnport \ > -L"$localport:$relayhost:25" sshvpn.example.com > > -- I know my ssh port. The localport, I guess, is for my home machine. Where do I get it from? Also, where do I put the above? I appreciate that I have not provided the most complete information for you to help, and so I thank you for making the time and the effort. Many thanks again, and best wishes, Ranjan
