I am running Kamailio in CentOS. I ran tcpdump and noticed that we are getting attacked from IP 188.138.32.72. I have already blocked it on IPtables, but he keeps on attacking the server. If I look at "/var/log/secure" there are no SIP messages. My question is where is the log file for Kamailio and how can I prevent this type of attacks in the future. Thanks,