[ale] AT&T blocking 25

Brian Schenken brian.schenken at gmail.com
Wed Apr 16 14:38:26 EDT 2008


I think "residential" service can opt-out too.  It certainly should be able
to.  It's sold as a preventative measure, you certainly shouldn't have to
pay extra to have certain ports open.

Some people run mail services for their families... websites... even old
timey telnet BBS's.  I understand blocking ports to generally keep botnets
and open relays off your network.  And I agree - as long as those of us who
don't require said measures aren't forced into them. It should be the case
that savvy people make better of their resources - not guiltily accept a
penalty for being an advanced user...


2008/4/16 Michael H. Warfield <mhw at wittsend.com>:

>
> On Wed, 2008-04-16 at 13:16 -0400, Christopher Fowler wrote:
> > We are back up in our office on AT&T and they are blocking 25.  I
> > thought maybe specifying their server as a smart relay would work but it
> > does not.
>
>         If it's a business grade service, just ask them to unblock it.
>  Just
> switched over one of my clients and there's no blocking what so ever.
>
>        If you're running your office on a residential service, shrug, bone
> up
> on IPv6 and find someone who will forward.
>
> > I have a sendmail server in our datacenter that requires authentication.
> > I would like it to be my smart relay for our office.
>
> > I've added an iptables rule on that server to route port 26 -> 25.  From
> > evolution I can send mail and I'm authenticating fine.  I need to
> > program one of our servers to use that machine as a smart relay.  Would
> > it be required to auth too?
>
>         Mike
> --
> Michael H. Warfield (AI4NB) | (770) 985-6132 |  mhw at WittsEnd.com
>   /\/\|=mhw=|\/\/          | (678) 463-0932 |
> http://www.wittsend.com/mhw/
>   NIC whois: MHW9          | An optimist believes we live in the best of
> all
>  PGP Key: 0xDF1DD471        | possible worlds.  A pessimist is sure of it!
>
>
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