どんなプロセスがどこのサーバーと接続しているかを調べるには,lsofコマンドを使うのが便利です.
現在のネットワーク接続状況を表示する.lsof -i
-iオプションで,ネットワークの接続状況を表示します.
xxxxxxxx$ lsof -i
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
UserEvent 239 xxxxxxxx 4u IPv4 0x1c0123f9b9bcc3b9 0t0 UDP *:*
sharingd 275 xxxxxxxx 12u IPv4 0x1c0123f9b9bceb91 0t0 UDP *:*
WiFiAgent 349 xxxxxxxx 16u IPv4 0x1c0123f9b9bcbf09 0t0 UDP *:*
Dropbox 361 xxxxxxxx 31u IPv4 0x1c0123f9d3a061c1 0t0 TCP 192.168.1.2:51318->snt-re3-6b.sjc.dropbox.com:http (ESTABLISHED)
Dropbox 361 xxxxxxxx 36u IPv4 0x1c0123f9b9bcdb29 0t0 UDP *:17500
Dropbox 361 xxxxxxxx 39u IPv4 0x1c0123f9c06fac31 0t0 TCP *:17500 (LISTEN)
plugin_ho 747 xxxxxxxx 27u IPv4 0x1c0123f9ba108dd1 0t0 TCP 192.168.1.2:50189->209-20-75-76.slicehost.net:http (CLOSE_WAIT)
Google 897 xxxxxxxx 70u IPv4 0x1c0123f9d3ba2dd1 0t0 TCP 192.168.1.2:55146->tb-in-f189.1e100.net:https (ESTABLISHED)
Google 897 xxxxxxxx 94u IPv4 0x1c0123f9d3ba7dd1 0t0 TCP 192.168.1.2:55447->nrt13s01-in-f21.1e100.net:https (ESTABLISHED)
Google 897 xxxxxxxx 125u IPv4 0x1c0123f9d3ba1c31 0t0 TCP 192.168.1.2:54327->tg-in-f188.1e100.net:5228 (ESTABLISHED)
firefox 909 xxxxxxxx 58u IPv4 0x1c0123f9d3a64021 0t0 TCP 192.168.1.2:55429->nrt13s01-in-f17.1e100.net:https (ESTABLISHED)
firefox 909 xxxxxxxx 74u IPv4 0x1c0123f9bbcffdd1 0t0 TCP 192.168.1.2:55436->ec2-54-64-43-213.ap-northeast-1.compute.amazonaws.com:http (ESTABLISHED)
iTunes 999 xxxxxxxx 41u IPv4 0x1c0123f9c0305a91 0t0 TCP *:daap (LISTEN)
iTunes 999 xxxxxxxx 42u IPv6 0x1c0123f9ba103251 0t0 TCP *:daap (LISTEN)
iTunes 999 xxxxxxxx 55u IPv4 0x1c0123f9d3a0d501 0t0 TCP 192.168.1.2:53804->s3-external-1.amazonaws.com:https (CLOSE_WAIT)
iTunes 999 xxxxxxxx 56u IPv4 0x1c0123f9d3a0d501 0t0 TCP 192.168.1.2:53804->s3-external-1.amazonaws.com:https (CLOSE_WAIT)
iTunes 999 xxxxxxxx 60u IPv4 0x1c0123f9d3a08dd1 0t0 TCP 192.168.1.2:53355->s3-external-1.amazonaws.com:https (CLOSED)
iTunes 999 xxxxxxxx 61u IPv4 0x1c0123f9d3a08dd1 0t0 TCP 192.168.1.2:53355->s3-external-1.amazonaws.com:https (CLOSED)
iTunes 999 xxxxxxxx 63u IPv4 0x1c0123f9d3a0ba91 0t0 TCP 192.168.1.2:53535->s3-external-1.amazonaws.com:https (CLOSED)
iTunes 999 xxxxxxxx 70u IPv4 0x1c0123f9d3a0ba91 0t0 TCP 192.168.1.2:53535->s3-external-1.amazonaws.com:https (CLOSED)
Safari 1103 xxxxxxxx 44u IPv4 0x1c0123f9d3a07c31 0t0 TCP 192.168.1.2:55418->nrt13s01-in-f5.1e100.net:https (ESTABLISHED)
Safari 1103 xxxxxxxx 46u IPv4 0x1c0123f9d3a07c31 0t0 TCP 192.168.1.2:55418->nrt13s01-in-f5.1e100.net:https (ESTABLISHED)
Safari 1103 xxxxxxxx 47u IPv4 0x1c0123f9d3a17501 0t0 TCP 192.168.1.2:55419->nrt13s01-in-f7.1e100.net:https (ESTABLISHED)
Safari 1103 xxxxxxxx 48u IPv4 0x1c0123f9d3a17501 0t0 TCP 192.168.1.2:55419->nrt13s01-in-f7.1e100.net:https (ESTABLISHED)
2秒おきに更新する.lsof -r 2 -a -i
オプションの詳細はこちら.
このコマンドはいろいろと便利です.