Re: Port 25 blocking

[Clyde Hoadley <hoadleyc () MSCD EDU>]

I failed to answer the second question.  We did the
blocking to help keep us off of black lists and to help
reduce the spread of viruses that have their own smtp
engine.  We have blocked incoming connection (except to
designated servers) for several years now.

--
Clyde Hoadley, CISSP
Security & Disaster Recovery Coordinator
Division of Information Technology
Metropolitan State College of Denver
hoadleyc () mscd edu
http://clem.mscd.edu/~hoadleyc/
(303) 556-5074

Clyde Hoadley wrote:

> Metropolitan State College of Denver has been blocking outgoing
> TCP connections to port 25 (except for designated mail services)
> for about 4 months now.  I also wanted to block POP and IMAP
> but was over ruled.  We've only received two complaints and those
> were easily appeased.

>>Tim Boshart wrote:
>>
>> Our department has started to discuss blocking port 25 at our firewall
>> for all machines except for our mail servers. How many places are doing
>> this? Why did you implement this?

**********
Participation and subscription information for this EDUCAUSE Discussion Group discussion list can be found at 
http://www.educause.edu/cg/.