masalah dns local sebagaimana dibawah ini :

[root@localdns syariful]# tail -F /var/log/messages
Sep 13 14:36:55 localdns kernel: printk: 128 messages suppressed.
Sep 13 14:36:55 localdns kernel: ip_conntrack: table full, dropping packet.
Sep 13 14:37:00 localdns kernel: printk: 136 messages suppressed.
Sep 13 14:37:00 localdns kernel: ip_conntrack: table full, dropping packet.
Sep 13 14:37:05 localdns kernel: printk: 137 messages suppressed.
Sep 13 14:37:05 localdns kernel: ip_conntrack: table full, dropping packet.
Sep 13 14:37:10 localdns kernel: printk: 131 messages suppressed.
Sep 13 14:37:10 localdns kernel: ip_conntrack: table full, dropping packet.
Sep 13 14:37:15 localdns kernel: printk: 123 messages suppressed.
Sep 13 14:37:15 localdns kernel: ip_conntrack: table full, dropping packet.
Sep 13 14:37:20 localdns kernel: printk: 123 messages suppressed.
Sep 13 14:37:20 localdns kernel: ip_conntrack: table full, dropping packet.

ok,untuk menyelesaikannya cukup lakukan langkah berikut :

# echo 131072 > /proc/sys/net/ipv4/ip_conntrack_max

untuk melihat jumlah awal nilai sebelum diubah dan sesudah diubah :

# cat /proc/sys/net/ipv4/netfilter/ip_conntrack_count