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No-ip.com actually has services for things like this. I actually signed up |
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for it recently (quite cheap for the service, you pay annually) because I |
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switched from Comcast to Knology broadband, and Knology blocks all incoming |
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traffic going to residential ips on port 25. |
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|
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With no-ip.com's Mail Reflector service, I point my MX record to mail1 and |
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mail2.no-ip.com, and they redirect all this mail to port 26 on my server |
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(this service is $40/year). You might be able to use this to accomplish what |
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you are trying to do. They also have a backup MX service as well. |
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|
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http://www.no-ip.com/services.php?mail=1 |
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|
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--Adrian |
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|
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|
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|
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-----Original Message----- |
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From: Martin Hajduch [mailto:martin.hajduch@×××××××××××.com] |
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Sent: Friday, October 15, 2004 12:54 PM |
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To: gentoo-server@l.g.o |
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Subject: Re: [gentoo-server] (postfix) backup mx to host:port other then |
| 22 |
:25 |
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|
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|
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|
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>I want to backup mx a server that is *not* accessible via default |
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>port 25. |
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>Is there a way to configure the backup mx in that way it sends data to the |
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>master server port != 25? |
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> |
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> |
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port is not part of MX dns record, it is always 25 |
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therefore no, you cannot have a backup MX pointing to another port |
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|
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of course, you can configure your smtp server to listen on any port you |
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wish, |
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but it won't help you with respect to the outside world |
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|
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the only possible solution would be to have two ip addresses on one |
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interface, run backup instance of |
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postfix on another port and redirect secondary ip address port 25 to the |
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port of the backup postfix instance |
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but this assumes having two (external) ip addresses available |
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|
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regards, |
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martin |
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|
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|
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Note: The information contained in this email and in any attachments is |
| 50 |
intended only for the person or entity to which it is addressed and may |
| 51 |
contain confidential and/or privileged material. Any review, |
| 52 |
retransmission, dissemination or other use of, or taking of any action in |
| 53 |
reliance upon, this information by persons or entities other than the |
| 54 |
intended recipient is prohibited. The recipient should check this email and |
| 55 |
any attachments for the presence of viruses. Sender accepts no liability |
| 56 |
for any damages caused by any virus transmitted by this email. If you have |
| 57 |
received this email in error, please notify us immediately by replying to |
| 58 |
the message and delete the email from your computer. This e-mail is and any |
| 59 |
response to it will be unencrypted and, therefore, potentially unsecure. |
| 60 |
Thank you. NOVA Information Systems, Inc. |
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