Comcast blocking port 25? (not what you think)
ken at flyingtoasters.net
Mon May 10 14:42:01 EDT 2004
What you can do -- which is what we did -- is set up SMTP to occur on an
arbitrarily high port (that won't be blocked), and tie that port to SMTP
on the server. NOTE: I'm talking about a situation where complete
control is had on a server, and outbound port 25 is blocked for a
client. Not the opposite case, wherein some poor schmo with a box on a
cable modem suddenly has is _inbound_ port 25 blocked (though that's
happened to me as well).
>On Mon, 10 May 2004, Steven W. Orr stated in their Email:
>Steve> From: Steven W. Orr <steveo at syslang.net>
>Steve> To: Travis Roy <travis at scootz.net>
>Steve> Cc: GNHLUG <discuss at gnhlug.org>
>Steve> Date: Mon, 10 May 2004 10:35:47 -0400 (EDT)
>Steve> Subject: Re: Comcast blocking port 25? (not what you think)
>Steve> On Monday, May 10th 2004 at 06:47 -0400, quoth Travis Roy:
>Steve> =>This isn't about Comcast blocking port 25 to prevent you from running a
>Steve> =>Recently my parents (that use Comcast) can no longer connect to port 25
>Steve> =>of my server.. one that is legit, has correct reverse and MX records.
>Steve> =>Has anybody else seen this?
>Steve> =>Can anybody suggest a workaround.
>Steve> This is no help for your problem, but I'll tell you what happened to me.
>Steve> I'm in Framingham and I have a choice (currently) between RCN and comcast.
>Steve> I'm with RCN but a while ago they shut off incoming port 80. Later on they
>Steve> shut off outgoing port 25. For the princely sum of only $240/year, I get
>Steve> the honor and priviledge of having those ports opened up. And I'm
>Steve> guaranteed that my IP address won't change. Ever.
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