[sllug-members]: Comcast Blocking Port 25?

[Remo Mattei]

Just test it and port 25 is open on my comcast.

Ciao,
Remo

u235sentinel wrote:
> Personally I vote for "Hanging up on Comcast" but I'm biased :-)
> 
> Of course this idea should work ok unless they do a packet inspection.
> You never know :D
> 
> 
> 
> Clint Savage wrote:
>> I personally have not experienced this problem and I've had Comcast
>> for some time.  However, I can give you some simple solutions that
>> might help you in the short term.
>>
>> There are two ways to solve this problem.  One is simply quitting
>> Comcast, and that might not be your desired option.  The other is to
>> set up some sort of routing around the problem.  Yes its a pain, but
>> actually not that hard.  I used iptables to set up a redirect rule on
>> my mail server; something like this:
>>
>> iptables -t nat -A PREROUTING -i eth0 -s my.client.ip.addr --dport
>> 2525 -j REDIRECT --to-ports 25  - This rule will accept anything on
>> port 2525 and redirect it to port 25.
>>
>> then on my client system, the one that's getting blocked, set up your
>> MUA (Thunderbird, Evolution, whatever) to send over port 2525 for SMTP
>> rather than 25.  If that won't work for you, use iptables to reroute
>> it to port 2525
>>
>> iptables -t nat -A OUTPUT -o eth0 -d my.mail.server.ip --dport 25 -j
>> REDIRECT --to-ports 2525  - This rule will accept anything on port 25
>> and redirect it to port 2525.
>>
>> That's close and with a little tweaking should work for you no problems.
>>
>> Cheers,
>>
>> Clint
>>
>> On 3/19/07, *Jeff Day * <jd at clickworks.com <mailto:jd at clickworks.com>>
>> wrote:
>>
>>     Hi All,
>>
>>     I guess I'll chime in with a question.....anyone have a problem
>> sending
>>     email thru port 25 over Comcast cable? Several weeks ago all outgoing
>>     traffic on port 25 was blocked...through their on-line, chat, support
>>     person says they don't do that.
>>
>>     Any input is welcome.
>>
>>     Thanks,
>>
>>     Jeff
>>     ____________
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