Re: TAL-IPC protocol with pf

[jason@dixongroup.net]

> Hello Group,
> Boy have I got one for you!  So my broker dealer upgrades his software
> that he uses to get pricing and he can't get any information.  I'm on
> the phone with their tech support and she says that I need to allow port
> 1838 outbound on my firewall.  Fair enough, I try that and things still
> don't work.  So I verify with the tech support rep that it runs over
> tcp... **BIG PAUSE** she replies, well actually it works over TAL-IPC
> which is a proprietary protocol that we've developed.  Oh... ok... so
> tcp wasn't good enough for you?  Anyway, the problem as it stands is
> that I still need to make this work.  I'm running OpenBSD 3.5 and here
> is a snippet of my ruleset.

I seriously doubt that they've rewritten their own transport-layer
protocol.  I imagine it's just another application-layer protocol on top
of TCP.  What type of traffic capture have you performed?  What _really_
leads you to believe that a broken application upgrade has anything to do
with the firewall.

--
Jason Dixon, RHCE
DixonGroup Consulting
http://www.dixongroup.net