Article View: comp.sys.next.sysadmin
Article #410what are all those UDP listeners doing?
From: Derek Beatty
Date: Fri, 07 Aug 1992 19:47
Date: Fri, 07 Aug 1992 19:47
21 lines
1645 bytes
1645 bytes
At the moment, netstat reports udp listeners on numbered ports 663, 664, 707, 1023, 1349, 2657, and 2935. Not to mention TCP listeners on 665, 666, and 2453. From RFC1340, I can figure out that 1349 must be where Simson Garfinkel's SBook program is checking for license violations. (At least one person is willing to do things right.) That leaves 2 unprivileged UDP, 1 unpriviledged TCP, 4 privileged UDP, and 2 privileged TCP ports, all unaccounted for. The unprivileged ports I don't mind so much--any random program might have bound to them. In fact, my guess is that 2453 might be the Mach netmessage server. It's the 6 renegade ports in the IANA-controlled range that bother me. Does anyone know who's binding to them, what they're doing, and why they're usurping "well-known" port numbers to do it? If it's because IANA only recently started managing 256-1023, is this fixed in 3.0? If not, is NeXT at least in the process of registering them? -- Derek_Beatty@cmu.edu grad student (No NeXTMail; MIME Ok.) 1 412 268 7898 Computer Science, Carnegie Mellon Univ., 5000 Forbes Ave, Pgh., PA 15213 USA
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Path: arc1-ca.pugleaf.net!sparky!uunet!dtix!darwin.sura.net!jvnc.net!rutgers!rochester!cantaloupe.srv.cs.cmu.edu!crabapple.srv.cs.cmu.edu!beatty From: beatty+@COSMOS.VLSI.CS.CMU.EDU (Derek Beatty) Newsgroups: comp.sys.next.sysadmin Subject: what are all those UDP listeners doing? Message-ID: <1992Aug07.194732.196881@cs.cmu.edu> Date: 7 Aug 92 19:47:32 GMT Organization: School of Computer Science, Carnegie Mellon Lines: 21 Nntp-Posting-Host: cosmos.vlsi.cs.cmu.edu Originator: beatty@COSMOS.VLSI.CS.CMU.EDU