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ip_conntrack: table full, dropping packet
How to increase ip_conntrack ?
If you got the following message ‘ip_conntrack: table full, dropping packet’ ,then you are under a very heavy load and also handling a high volume of network connections ,Generally, the ip_conntrack_max is set to the total MB of RAM installed multiplied by 16.However, this server had 4GB of RAM, but ip_conntrack_max was set to 65536 (4 X 1024 X16):
# cat /proc/sys/net/ipv4/ip_conntrack_max 65536If you want to check your server’s current tracked connections, just run the following:
# cat /proc/sys/net/ipv4/netfilter/ip_conntrack_countIf you want to adjust it (as I did), just run the following as root:
# echo 131072 > /proc/sys/net/ipv4/ip_conntrack_maxInstalling mod_evasive on Apache 2.X How to boot guest machine in single mode or other run levels
ip_conntrack: table full, dropping packet
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