On 05/30, Les Mikesell wrote: > On Fri, May 30, 2014 at 10:14 AM, Eric Falbe <ericf706 at gmail.com> wrote: > > Hi All, > > > > I was wondering if anyone knew of a way to notify or log when a specific remote port is openened? I have an old LDAP server that I am looking to get rid of, but there is still a few queries reaching it. > > > > The sytem authentication is setup correctly (as is Postfix), so I am thinking there must be some script or program that is setup to query the older LDAP server. > > > > I tried using lsof -i|grep 389, but I am not quick enough to get results before the socket is closed. Is there any program or script I could write to detect when this socket gets opened, and what PID and/or program owns it? > > > > I'd run tcpdump or wireshark with a 'port 389' filter on the old ldap > server to capture the source IPs of the queries if you don't know the > host(s) doing it. And if you know the host(s) but not the program(s) > configured to do it, you might try a 'grep -R 'pattern' /etc > where the pattern is the name or ip of the ldap server. > > -- > Les Mikesell > lesmikesell at gmail.com > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos That's what I am currently doing, (grep -R "old_server") and letting it chug along. I tried the iptables rule, but I still could not find the connection is lsof output, so the connection must close before the log proccessing takes place. Thanks for the suggestions. Eric Falbe