If are seeing a lots of “TCP: drop open request from A.B.C.D” messages and you don’t expect a real load the server, you’ll need to enable syncookies. Edit your /etc/sysctl.conf and append the following lines:
# enable syncookies net.ipv4.tcp_syncookies = 1
Then restart network service.
[root@centurion ~]# /etc/init.d/network restart Shutting down interface eth0: [ OK ] Shutting down loopback interface: [ OK ] Setting network parameters: [ OK ] Bringing up loopback interface: [ OK ] Bringing up interface eth0: [ OK ]
2 comments ↓
After editing /etc/sysctl.conf you must run
sysclt -p
I don’t think restarting the network will help
the command is
/sbin/sysctl -p
to reload conf
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