nanog mailing list archives

Re: TCP and UDP Port 0 - Should an ISP or ITP Block it?

From: Nick Hilliard <nick () foobar org>
Date: Wed, 26 Aug 2020 14:00:21 +0100

K. Scott Helms wrote on 26/08/2020 13:55:

To be clear, UDP port 0 is not and probably shouldn't be blocked
because some network gear and reporting tools may mistake a fragmented
UDP PDU for port 0.  That's an implementation error, but one that may
be common enough to create issues for users.

do you have data on this?

Nick

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? Job Snijders (Aug 25)
    - Re: TCP and UDP Port 0 - Should an ISP or ITP Block it? K. Scott Helms (Aug 25)
    - Re: TCP and UDP Port 0 - Should an ISP or ITP Block it? Mike Hammett (Aug 25)
    - 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? Jon Lewis (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? 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? William Herrin (Aug 25)
  - RE: TCP and UDP Port 0 - Should an ISP or ITP Block it? adamv0025 (Aug 25)
- Re: TCP and UDP Port 0 - Should an ISP or ITP Block it? Dobbins, Roland (Aug 25)

(Thread continues...)