nanog mailing list archives
Re: TCP and UDP Port 0 - Should an ISP or ITP Block it?
From: John Kristoff <jtk () depaul edu>
Date: Tue, 25 Aug 2020 07:48:27 -0500
On Tue, 25 Aug 2020 12:40:43 +0000 Pim van Stam <pim () vanstam-ict nl> wrote:
Ohter opinions on this?
IETF RFC 768 - User Datagram Protocol weighs in: "Source Port is an optional field, when meaningful, it indicates the port of the sending process, and may be assumed to be the port to which a reply should be addressed in the absence of any other information. If not used, a value of zero is inserted." In practice however, most applications I've seen that do not expect a response still set a non-zero value (e.g. flow-export, syslog). John
Current thread:
- 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? K. Scott Helms (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)
- 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)
- Re: TCP and UDP Port 0 - Should an ISP or ITP Block it? Job Snijders (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)
- 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? 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)