Número màxim de connexions:
$ cat /proc/sys/net/ipv4/netfilter/ip_conntrack_max
Veure les connexions:
$ grep -c ^udp /proc/net/ip_conntrack 3693 # Here UDP is using 3693 entries
$ grep -c ^tcp /proc/net/ip_conntrack 115 # and TCP uses only 115 entries
$ cat /var/log/messages
Buscar missatges com:
<4>kernel: ip_conntrack: table full, dropping packet. <4>kernel: NET: 15 messages suppressed. <4>kernel: ip_conntrack: table full, dropping packet. <4>kernel: NET: 12 messages suppressed.