RE: Firewall Ports

  • From: "Mulnick, Al" <Al.Mulnick@xxxxxxxxxx>
  • To: "'[ExchangeList]'" <exchangelist@xxxxxxxxxxxxx>
  • Date: Mon, 1 Dec 2003 13:56:05 -0500


That depends on where you intend to get your DNS resolution from, but
otherwise TCP 25 outbound from your host to any and a second rule of any to
your host on TCP 25 should be good.  If you decide that you need to have
external name resolution (which you likely do from your ISP) you'll need to
also set host to ISP_DNS TCP/UDP 53.  


-----Original Message-----
From: Koie [mailto:koie@xxxxxxxxxxx] 
Sent: Monday, December 01, 2003 1:37 PM
To: [ExchangeList]
Subject: [exchangelist] Firewall Ports

Which ports need to be opened/fowarded on a hardware fireall to an exchange
server to allow it to recieve/send mail? Would it be 25 and 113?


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