Miscellany

server:~# iptables -L -v
Chain INPUT (policy ACCEPT 13166 packets, 1372K bytes)
 pkts bytes target     prot opt in     out     source               destination
    2   332            tcp  --  any    any     anywhere             anywhere            tcp dpt:ssh recent: SET name: SSH side: source
    2   332 SSH_WHITELIST  tcp  --  any    any     anywhere             anywhere            tcp dpt:ssh
    0     0 ULOG       tcp  --  any    any     anywhere             anywhere            tcp dpt:ssh recent: CHECK seconds: 60 hit_count: 4 TTL-Match name: SSH side: source ULOG copy_range 0 nlgroup 1 prefix `SSH_brute_force' queue_threshold 1
    0     0 DROP       tcp  --  any    any     anywhere             anywhere            tcp dpt:ssh recent: CHECK seconds: 60 hit_count: 4 TTL-Match name: SSH side: source

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain OUTPUT (policy ACCEPT 15452 packets, 5071K bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain SSH_WHITELIST (1 references)
 pkts bytes target     prot opt in     out     source               destination
    0     0 ACCEPT     0    --  any    any     jan.bude.lan         anywhere            recent: REMOVE name: SSH side: source
server:~# cat /proc/net/ipt_recent/SSH
src=140.211.166.4 ttl: 52 last_seen: 5801735 oldest_pkt: 2 5787039, 5801735