You need a separate IP...so put two IPs on the box and NAT 25 to 25 on one, and 587 to 25 on the other. IMail will listen on all IPs on the box.
Darin. ----- Original Message ----- From: "Don Brown" <[EMAIL PROTECTED]> To: "Matt" <[EMAIL PROTECTED]> Cc: <[email protected]> Sent: Sunday, January 23, 2005 5:22 PM Subject: Re: [IMail Forum] Supporting Users with port 25 blocked... How is it typically done in the Cisco IOS - for a certain public ip for port 587 to be redirected to the same certain ip but port 25? Thanks, Sunday, January 23, 2005, 12:38:04 PM, Matt <[EMAIL PROTECTED]> wrote: M> Unless you have a reason why you would want to use another piece of M> software for validating addresses (very necessary these days), you are M> probably going to want something that is software and does port M> forwarding, but not another MTA of some sort. I don't know of any port M> forwarding software that isn't some form of a firewall or proxy. Maybe M> someone else knows better about what is available. M> I believe that you could get away with a really cheap standard Linksys M> router if you weren't looking to spend a lot of cash, the config would M> be somewhat of a kludge to have work properly, but I'm pretty sure it M> can be done.. Lots of routers do port forwarding, so you don't M> necessarily need a Cisco to pull this off if you wanted a more M> straightforward solution. IMO, every Internet server should be behind a M> port blocking router, otherwise you may very well end up hacked through M> some open port exploit, so a router has many advantages besides this one M> thing. M> Matt M> Gary Brumm wrote: >> SBC just blocked port 25 for their dynamically assigned DSL users. I >> can have those users switch to SBC's SMTP servers but I have >> been meaning to open up port 587 for my users that travel. I was >> wondering what software solutions you guys have been using (like the >> ones suggested below) and if there are any problems associated with >> doing it via software on the IMail machine as opposed to doing it with >> a hardware firewall. If it is a software solution it must run as a >> service. >> >> Thanks, >> >> Gary >> >> >> At 09:38 AM 8/27/2004, you wrote: >> >>> [EMAIL PROTECTED] wrote: >>> >>>> Jim, >>>> If your firewall supports it, I'd suggest port remapping on the >>>> firewall. >>>> Have any port translated to IMail on port 25. >>>> You could achieve the same solution using a port redirector software >>>> on your IMail box. >>>> There is a bunch of Port Forwarder/Redirector Softwares available, e.g. >>>> PortTunnel by http://www.steelbytes.com/ >>>> or >>>> Fpipe by >>>> http://www.foundstone.com/index.htm?subnav=resources/navigation.htm&subcontent=/resources/freetools.htm >>>> >>> >>> >>> I gave FPipe a shot, and while it does work, IMail sees the >>> redirected traffic as coming from itself, which will defeat my >>> relaying setting. While that may not be a problem at the moment, some >>> time in that not-so-distant future, some spammer may become clever >>> enough to start relaying traffic through port 587, and I will become >>> an open relay. >>> >>> Is there a redirector that does preserve the source IP, or is that >>> even possible? >>> >>> -- >>> A. Clausen >>> [EMAIL PROTECTED] >>> >>> >>> To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html >>> List Archive: >>> http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ >>> Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ >> >> >> ComsecNet >> Dedicated Data Services >> Stockton, CA >> Phone:(209) 463-2809 >> Fax: (209) 938-0481 >> Email: [EMAIL PROTECTED] >> Web: www.comsec.net >> >> This message is intended for the use of the individual or entity to >> which it is addressed and may contain information that is privileged, >> confidential, and exempt from disclosure under applicable law. If the >> reader of this message is not the intended recipient or an employee or >> agent responsible for delivering to the intended recipient, you are >> hereby notified that any dissemination, distribution or copying of >> this communication is strictly prohibited. If you have received this >> communication in error please destroy this message and notify the >> sender by reply email. >> >> >> >> >> >> To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html >> List Archive: >> http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ >> Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ >> >> M> To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html M> List Archive: M> http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ M> Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ ---- Don Brown - Dallas, Texas USA Internet Concepts, Inc. [EMAIL PROTECTED] http://www.inetconcepts.net (972) 788-2364 Fax: (972) 788-5049 ---- To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
