Am 15.01.2013 14:10, schrieb Alexander Farber: > Thanks for replying - > > On Tue, Jan 15, 2013 at 1:55 PM, Wietse Venema <wie...@porcupine.org> wrote: >> Alexander Farber: >>> And have opened port 25 in the firewall: >>> >>> But now when I send a mail to s...@videoskat.de >>> there is nothing to see in postfix logs: >> >> Nothing happens unless a connection is made. Does tcpdump >> show any connections coming to your system at TCP port 25? > > sorry for the stupid question, but how to use > tcpdump to check for incoming connections?
tcpdump shows you the complete network-traffic why not simply start it and lokk what it does? > I've come up only with these commands sofar: > > # netstat -an |grep -w 25 > tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN how do you imagine connections from outside if you configure a daemon only listen on loopback device? P.S.: why cross posting on CentOS-list?
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