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Display any tcp connections to apache

Terminal - Display any tcp connections to apache
for i in `ps aux | grep httpd | awk '{print $2}'`; do lsof -n -p $i | grep ESTABLISHED; done;
2009-02-05 17:50:52
User: Shadow
Functions: awk grep
6
Display any tcp connections to apache

Sometimes apache will get stuck in an established state where you can't get a list of the connecting IP's from mod_status... not a good thing when you need to ban an abusive ip.

Alternatives

There are 4 alternatives - vote for the best!

Terminal - Alternatives
lsof -nP -c COMMAND | egrep -o '(TCP|UDP).*$' | sort -u
2011-01-25 12:04:13
User: forcefsck
Functions: egrep sort
Tags: egrep lsof udp tcp
0

Where COMMAND is the process(es) name. I prefer to get all states but you may add ESTABLISHED in the grep regex.

lsof -c apache2 | egrep -o 'TCP.*ESTABLISHED.*$'

-nP flags are optional and UDP is irrelevant for established connections

Similar but using the process id:

lsof -nP -p PID | egrep -o '(TCP|UDP).*$'

Know a better way?

If you can do better, submit your command here.

What others think

I can't seem to get this one working, using Ubuntu 8.04 here's the output: I even tried it with sudo...

eseven73@server:~$ for i in `ps aux | grep httpd | awk '{print $2}'`; do lsof -n -p $i | grep ESTABLISHED; done;

eseven73@server:~$ for i in `ps aux | grep httpd | awk '{print $2}'`; do lsof -n -p $i | grep ESTABLISHED; done;

eseven73@server:~$ sudo !!

sudo for i in `ps aux | grep httpd | awk '{print $2}'`; do lsof -n -p $i | grep ESTABLISHED; done;

bash: syntax error near unexpected token `do'

Comment by eseven73 326 weeks and 3 days ago

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