NormanSPremium,MVM
join:2001-02-14
San Jose, CA
kudos:4 Reviews:
 ·SONIC.NET
·Pacific Bell - SBC
| reply to robertfl
Re: [ALL] Wash Post criticizes Cox over email security said by robertfl:ISP's can help stop the spam. If they want to and doing things like blocking port 25 isn't the bloody answer. Maybe not, but...
Comcast uses selective port 25 blocking. They block customers identified as having abusive port 25 traffic. I see fewer Comcast zombie connections to my mail server than Verizon zombie connections. Verizon has half as many customers as Comcast, but half again as many zombie connections. Verizon does not block port 25 at all.
Back when it was still SBC, I got more zombie connections from them than from Comcast; though Comcast had more customers. Then they implemented full port 25 blocking. SBC zombie connections attempts dropped significantly subsequently. Today AT&T (the renamed SBC) connection attempts are significantly lower than Comcast zombie connection attempts (by a factor of 10), even though AT&T now has more customers.
No. I guess port 25 blocking isn't all that effective after all........
--
Norman
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum |
