Hi Viktor, Thanks for your response!
On Sat, 10 Oct 2020 19:31:09 -0400 Viktor Dukhovni <postfix-us...@dukhovni.org> wrote: > On Sat, Oct 10, 2020 at 04:04:30PM -0500, Ranjan Maitra wrote: > > > I have postfix running on both my home and office machines. I am able > > to send e-mail from my office machine (that uses my employer's > > mailhub, etc), but not from my home machine when using my office > > e-mail address as the sender's address. However, I am able to connect > > via ssh+vpn with 2FA to my office machine. My question is: can I set > > my home machine's postfix up such that I can send e-mail through the > > ssh tunnel to my office machine (sorry for my non-technical > > description). How do I do this, if possible? > > Your question is not sufficiently detailed/precise for an answer to > be possible. You need to provide more details about the SSH VPN. I am not sure I know all the answers to your questions, so some suggestions on how to figure these out would be very helpful (I am on Fedora 32 linux). > - Does it allow port forwarding? Or just terminal and perhaps > X11 sessions? I believe that is allows at least some port forwarding, but I do not know what all it does. My ssh is to a non-standard port, however. > - What ports if any can you forward? > - Any other relevant details... How do I figure this out? cat /etc/services | grep ssh ssh 22/tcp # The Secure Shell (SSH) Protocol ssh 22/udp # The Secure Shell (SSH) Protocol x11-ssh-offset 6010/tcp # SSH X11 forwarding offset ssh 22/sctp # SSH sshell 614/tcp # SSLshell sshell 614/udp # SSLshell netconf-ssh 830/tcp # NETCONF over SSH netconf-ssh 830/udp # NETCONF over SSH sdo-ssh 3897/tcp # Simple Distributed Objects over SSH sdo-ssh 3897/udp # Simple Distributed Objects over SSH netconf-ch-ssh 4334/tcp # NETCONF Call Home (SSH) snmpssh 5161/tcp # SNMP over SSH Transport Model snmpssh-trap 5162/tcp # SNMP Notification over SSH Transport Model tl1-ssh 6252/tcp # TL1 over SSH tl1-ssh 6252/udp # TL1 over SSH ssh-mgmt 17235/tcp # SSH Tectia Manager ssh-mgmt 17235/udp # SSH Tectia Manager > Also: > > - Do you ever send email to office recipients from your non-office > email address? How do you want these to be routed? I use postfix only for my office e-mail address so I do not believe this to be an issue. > > - If you do use your office address as a sender address, but a > message is not deliverable, how should the bounce be routed? I don't know if this is the answer, but I guess that the bounce should be routed back to my office e-mail address? I am happy to provide more information. Many thanks again and best wishes, Ranjan > > -- > Viktor. > -- Important Notice: This mailbox is ignored: e-mails are set to be deleted on receipt. Please respond to the mailing list if appropriate. For those needing to send personal or professional e-mail, please use appropriate addresses.
