nanog mailing list archives
Re: New and interesting network abuse.
From: Suresh Ramasubramanian <ops.lists () gmail com>
Date: Tue, 11 Jan 2005 13:12:40 +0530
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.
Current thread:
- New and interesting network abuse. Ejay Hire (Jan 10)
- Re: New and interesting network abuse. Suresh Ramasubramanian (Jan 10)
- Re: New and interesting network abuse. Adrian Chadd (Jan 11)