ZioPRoTo (Saverio Proto) zioproto at gmail.com Wed May 25 20:59:43 CEST 2011 Previous message: NetworkManager and tinc Next message: kernel: possible SYN flooding on port 655. Sending cookies. Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] beginarticle On a Linux Server running tincd I noticed the following log message in /var/log/messages kernel: possible SYN flooding on port 655. Sending cookies. I found this on the web: If SYN cookies are enabled, then the kernel doesn't track half open connections at all. Instead it knows from the sequence number in the following ACK datagram that the ACK very probably follows a SYN and a SYN-ACK. That way SYN floods are not a problem to it. So I guess there is nothing to worry about, correct ? Saverio endarticle Previous message: NetworkManager and tinc Next message: kernel: possible SYN flooding on port 655....