11 Jan
2005
11 Jan
'05
2:42 a.m.
Thread that I just started yesterday about port 25 blocking and if more ISPs werent doing this bidirectionally. Which is what your local ISP, and other ISPs that have dialup pools, must do. --srs On Tue, 11 Jan 2005 01:33:00 -0600, Ejay Hire <ejay.hire@isdn.net> wrote:
My apologies if this strays off topic, but I wanted to share my recent experience.
We had a collocation customer come in and request a t1 of pots lines for their servers, then complaints that their "security" software wasn't working because of our RPF checks. As it turns out they were dialing up to a local isp, and sending bulk email using our bandwidth, but the dial-up's ip.... And receiving the TCP ack on the dial up.