Re: ISA Server Alerts: SMTP

At 12:25 PM 10/29/2002, you wrote: 
http://www.ISAserver.org


Unfortunately, I haven't found a reference to those commands yet.
You can make many friends around the world if you succeed...


Hey Jim- thanks for the shout-outs...


Thank you, Jim!  (NOOP command length was only 6. I so would not have
known it can be up to 20, though).

I've actually changed mine to 38- I originally tested with 20 just fine, but every once in a while I would get an Exchange 5.5 box (don't know why) that would pump the trailing 0x20's to 38 bytes. At 38, I've not seen any problems at all.

Yes, we are using Exchange.  Do I have to add "XEXCH" ("XEXCH50"?) to
the SMTP filter?  If so, what should be its maximum length?

ISA Also sends "unknown SMTP command" e-mails for the following 4
commands:
   X-LINK2STATE DROP
   X-LINK2STATE LAST
   X-EXPS GSSAPI
   UIT

Is it safe to add them to the SMTP filter in ISA too?

Unless you are doing direct server-to-server link state table updates over ESMTP via the Internet (as opposed to a VPN) which I strongly doubt you are, then you don't need those commands. They are for bridge head servers to sync up with themselves. The X-LINK2STATE commands are actually ESMTP, no your standard SMTP. You are seeing other people's Exchange2k boxes trying to talk to yours- don't let them!

Leave those guys turned off...

T




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