> -----Original Message----- > From: centos-bounces at centos.org > [mailto:centos-bounces at centos.org] On Behalf Of D. Ivago > Sent: Thursday, 27 April 2006 9:54 p.m. > To: centos at centos.org > Subject: [CentOS] smux service (port 199) > > Hi, > > when I run a nmap localhost I see that port 199 is open for > the smux service but when I check the services gui in > runlevel 3 or 5 I don't find it. It's also not in /etc/init.d/ > > At the moment almost everything is inactive except for some > well known services like httpd crond etc. but mux is still there. > > Does anyone know how to colse this service? It's part of SNMP (multiplexer for sub-agents to connect to the master agent I believ). If you are on Centos3, you're out of luck - that version of net-snmp cannot turn it off (you'll have to use iptables or the like to block it). If you're on Centos4, you can add the following line to snmpd.conf: smuxsocket 127.0.0.1 And restart snmpd. This doesn't close the port, but means that snmpd only listens to it on localhost so it is inaccessible from other hosts on the network. Nmap on "localhost" will still show it up as open, but from anywhere else on the network it won't. Craig Miskell ======================================================================= Attention: The information contained in this message and/or attachments from AgResearch Limited is intended only for the persons or entities to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipients is prohibited by AgResearch Limited. If you have received this message in error, please notify the sender immediately. =======================================================================