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Old 07-22-2005, 03:22 AM   #1
Registered: Jun 2005
Distribution: Fedora Core 3
Posts: 96

Rep: Reputation: 15
Passing by

Just a quick question, This is what I got:
router - mapped to send requests for port 53 adn 25 to DNS machine
DNS and Email server in One

If i want email to go to the mail server i have to open up port 25 right.... ok...

what if this is what I have:
router - mapped to send port 53 to DNS, but do I map port 25 to mail server, not map it, or map it to the DNS?
Email Server

Do I have to open port 25 on the DNS or will it automatically send requests for port 25 to the mail server?

Old 07-22-2005, 04:12 AM   #2
Registered: Mar 2004
Location: Netherlands
Distribution: Debian
Posts: 729

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Don't use ports for more than one function, you can choose so many.
Old 07-22-2005, 04:33 AM   #3
Registered: Jun 2005
Distribution: Fedora Core 3
Posts: 96

Original Poster
Rep: Reputation: 15
thats not the question I asked, I didnt ask whether or not to use one port for more than one function as im not... port 53 is for DNS and 25 is for smtp..... can someone please answer my original question...

Thank you

Old 07-22-2005, 05:06 AM   #4
Senior Member
Registered: Oct 2004
Posts: 1,192

Rep: Reputation: 101Reputation: 101
Map port 53 on your router to port 53 on your computer for both tcp and udp. Map port 25 on your router to port 25 on your computer for tcp only.

your Dns software is nothing to do with your smtp software, keep them separate. Other smtp server's need to lookup where your smtp server is at, and they do that by querying your DNS server, they can then send your email to your smtp server, that is as about linked as the two pieces of software get.


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