Date: Tue, 15 Sep 2015 09:06:58 +0200 From: "O. Hartmann" <ohartman@zedat.fu-berlin.de> To: freebsd-net@freebsd.org Subject: HELP! Mysterious socket 843/tcp listening on CURRENT system Message-ID: <20150915090658.1e0b9074@freyja.zeit4.iv.bundesimmobilien.de>
next in thread | raw e-mail | index | archive | help
Hopefully, I'm right on this list. if not, please forward. Running CURRENT as of FreeBSD 11.0-CURRENT #3 r287780: Mon Sep 14 13:34:16 CEST 2015 amd64, I check via nmap for open sockets since I had trouble protecting a server with IPFW and NAT. I see a service (nmap) Host is up (0.041s latency). Not shown: 998 filtered ports PORT STATE SERVICE 843/tcp open unknown and via sockstat -l -p 843, I get this: ? ? ? ? tcp4 *:843 *:* I double checked all services on the server and i can not figure out what daemon or service is using this port. The port is exposed throught NAT (I use in-kernel NAT on that system). This service is accessible via telnet host-ip 843: Trying 85.179.165.184... Connected to xxx.xxx.xxx.xxx. Escape character is '^]'. Well, I feel pants-down right now since it seems very hard to find out what service is keeping this socket open for communications to the outside world. Anyone any suggestions? Thanks in advance, Oliver
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20150915090658.1e0b9074>