firewalld – enable logging

2016-05-16 1 min read Fedora
firewalld by default does not allow packets that are dropped. In some cases, you need to find out if some packet is being dropped or not. For doing so you may want to enable logging of dropped packets with the following command: sudo firewall-cmd --set-log-denied=all This will enable logging all the packets and help you figure out if firewalld is dropping the packet.

log analysis with perl and wireshark decode.

2010-04-11 1 min read Linux
Here is something that I had to do in couple of hours to check the logs. The problem was the log file was printing the Received and Sent message in the hex format. I had to verify if the messages were correct. So here is how to do it. open(FP, &#8221;<$ARGV[0]&#8221;)|| die &#8221;File $ARGV[0] does not exist&#8221;; while ($line = ) { if ($line =~ /(Received :)|(Sending :)/) { Continue reading