nanog mailing list archives
Re: TCP and UDP Port 0 - Should an ISP or ITP Block it?
From: Töma Gavrichenkov <ximaera () gmail com>
Date: Tue, 25 Aug 2020 15:18:35 +0300
Peace, On Tue, Aug 25, 2020, 3:14 PM Jon Lewis <jlewis () lewis org> wrote:
When an application sends more data via UDP than can be fit in a single packet, only the first packet has a UDP header [where the port info is stored]. The rest of the fragments have no UDP header, which most things will report as UDP src/dst port = 0.
Oh yes, if you don't reassemble fragments on your equipment then please please do not filter anything. -- Töma
Current thread:
- Re: TCP and UDP Port 0 - Should an ISP or ITP Block it?, (continued)
- Re: TCP and UDP Port 0 - Should an ISP or ITP Block it? Pim van Stam (Aug 25)
- Re: TCP and UDP Port 0 - Should an ISP or ITP Block it? Töma Gavrichenkov (Aug 25)
- Re: TCP and UDP Port 0 - Should an ISP or ITP Block it? Job Snijders (Aug 25)
- Re: TCP and UDP Port 0 - Should an ISP or ITP Block it? K. Scott Helms (Aug 25)
- Message not available
- Re: TCP and UDP Port 0 - Should an ISP or ITP Block it? John Kristoff (Aug 25)
- Re: TCP and UDP Port 0 - Should an ISP or ITP Block it? Tom Beecher (Aug 25)
- Message not available
- Re: TCP and UDP Port 0 - Should an ISP or ITP Block it? K. Scott Helms (Aug 26)
- Re: TCP and UDP Port 0 - Should an ISP or ITP Block it? Nick Hilliard (Aug 26)
- Re: TCP and UDP Port 0 - Should an ISP or ITP Block it? K. Scott Helms (Aug 26)
- Re: TCP and UDP Port 0 - Should an ISP or ITP Block it? Töma Gavrichenkov (Aug 25)
- Re: TCP and UDP Port 0 - Should an ISP or ITP Block it? Douglas Fischer (Aug 25)
- Re: TCP and UDP Port 0 - Should an ISP or ITP Block it? Mel Beckman (Aug 25)
- Re: TCP and UDP Port 0 - Should an ISP or ITP Block it? Matthew Petach (Aug 25)
- RE: TCP and UDP Port 0 - Should an ISP or ITP Block it? adamv0025 (Aug 25)