[lug] attbi: misconfigured BROADCAST addr, etc?

[John Hernandez]

To deny relay (after you connect and request a relay) is now default 
MTA policy, agreed.

But AT&T is using a firewall (above the application layer, independent 
of sendmail) to block TCP connection requests to port 25 from outside 
their network.  This is what I though was unorthodox, but basically 
yields the same results.

Dhruva B. Reddy wrote:

> On Mon, Dec 10, 2001 at 10:22:19AM -0700, quoth John Hernandez:
> 
>>Neal McBurnett wrote:
>><snip> 
>>
>>Port 25 (smtp) being closed to the outside, OTOH, seems reasonable (if 
>>a bit unorthodox).  The only reason you would need connectivity to this 
>>
>   ^^^^^^^^^^^^^^^^
> 
> I don't know about this.  I found out the hard way that the way sendmail
> comes out of the box, it does not allow relaying from outside.  I think
> this started with the next to last major release.
> 
> Dhruva
> 
> _______________________________________________
> Web Page:  http://lug.boulder.co.us
> Mailing List: http://lists.lug.boulder.co.us/mailman/listinfo/lug
> 


-- 

   - John Hernandez - Network Engineer - 303-497-6392 -
  |  National Oceanic and Atmospheric Administration   |
  |  Mailstop R/OM12. 325 Broadway, Boulder, CO 80305  |
   ----------------------------------------------------