nanog mailing list archives
Re: ISP port blocking practice
From: "Ricky Beam" <jfbeam () gmail com>
Date: Thu, 22 Oct 2009 17:37:03 -0400
On Thu, 22 Oct 2009 13:22:17 -0400, Zhiyun Qian <zhiyunq () umich edu> wrote:
1). For any outgoing traffic, if the destination port is 25, then drop the packets. 2). For any incoming traffic, if the source port is 25, then drop the packets.
Inspecting outgoing traffic is generally easier to do as there's less of it. (in a consumer context, which is the only place such filtering makes any sense.)
--Ricky
Current thread:
- ISP port blocking practice Zhiyun Qian (Oct 22)
- Re: ISP port blocking practice Antonio Querubin (Oct 22)
- Re: ISP port blocking practice Valdis . Kletnieks (Oct 22)
- Re: ISP port blocking practice Ricky Beam (Oct 22)
- Re: ISP port blocking practice Justin Shore (Oct 22)
- Re: ISP port blocking practice Lyndon Nerenberg (VE6BBM/VE7TFX) (Oct 22)
- Re: ISP port blocking practice Sean Donelan (Oct 22)
- Re: ISP port blocking practice Joe Maimon (Oct 22)
- Re: ISP port blocking practice Steve Bertrand (Oct 22)
- Re: ISP port blocking practice Lyndon Nerenberg (VE6BBM/VE7TFX) (Oct 23)
- Re: ISP port blocking practice Chris Boyd (Oct 23)
- Re: ISP port blocking practice Lyndon Nerenberg (VE6BBM/VE7TFX) (Oct 22)
- Re: ISP port blocking practice Justin Shore (Oct 22)
- Re: ISP port blocking practice Joe Maimon (Oct 22)
- Re: ISP port blocking practice Justin Shore (Oct 22)