Hello, Last Friday I installed a RedHat 7.2 with ext3 file system, custom 2.4.18 firewall and ipytables-1.2.5. The server is a squid cache. When I try to use it as a HTTP proxy I get a lot of SYN flood in my log file.
$ipt --new-chain syn-flood $ipt --append syn-flood --match limit --limit 1/s --limit-burst 4 --jump RETURN $ipt --append syn-flood --jump LOG --log-prefix "$fw SYNFLOOD:" $ipt --append syn-flood --jump DROP ...... $ipt --append INPUT -i eth0 --protocol tcp --syn --jump syn-flood $ipt --append INPUT -ieth0 --protocol tcp --syn --jump syn-flood I have RedHat 7.1 with ext2 with 3 interface cards and with the same rule and works perfect. I changed Inter pro100 NIC to 3c905C-TX without success. What can be the cause of the problem? Best regards. Erdal MUTLU
