PF filter rule for LAN to LAN ssh traffic

James B. Byrne byrnejb at
Wed Jan 23 23:20:35 UTC 2019

What is the PF filter rule to permit ssh between hosts on the LAN side
of a gateway firewall?  When I ssh to a host the intitial connection
works fine.  But, after a few seconds the session becomes
non-responsive and is eventually dropped with this message

Fssh_packet_write_wait: Connection to port 22: Broken pipe

I tried various formulations of this:

pass          in  log   on $int_if \
                  from  $int_if:network \
                  to    $int_if:network keep state

pass          out log   on $int_if \
                  from  $int_if:network \
                  to    $int_if:network keep state

None of which worked.

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James B. Byrne                mailto:ByrneJB at
Harte & Lyne Limited
9 Brockley Drive              vox: +1 905 561 1241
Hamilton, Ontario             fax: +1 905 561 0757
Canada  L8E 3C3

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