I have just run netstat on my raspberry pi and found out there more than 100 (!) open connections. Is this something I should be worried about? How do I stop my rasp pi from opening so many connections?
I have arch linux installed on it.
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Execute the following command to see which PID (Process ID) / Program opened the connection: sudo netstat -a --program Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 *:9090 *:* LISTEN 1016/xbmc.bin tcp 0 0 *:sunrpc *:* LISTEN 825/rpcbind tcp 0 0 *:http *:* LISTEN 1016/xbmc.bin tcp 0 0 *:ftp *:* LISTEN 741/vsftpd tcp 0 0 *:ssh *:* LISTEN 727/sshd tcp 0 0 *:36666 *:* LISTEN 1016/xbmc.bin tcp 0 0 *:36667 *:* LISTEN 1016/xbmc.bin tcp 0 0 37L4247F26-13:ssh jpm-lt:54418 ESTABLISHED 3477/sshd: pi [priv tcp6 0 0 [::]:sunrpc [::]:* LISTEN 825/rpcbind tcp6 0 0 [::]:ssh [::]:* LISTEN 727/sshd udp 0 0 *:45593 *:* 442/dhclient udp 0 0 *:9777 *:* 1016/xbmc.bin udp 0 0 *:bootpc *:* 442/dhclient udp 0 0 *:sunrpc *:* 825/rpcbind udp 0 0 37L4247F26-13:ntp *:* 736/ntpd udp 0 0 raspbmc:ntp *:* 736/ntpd udp 0 0 *:ntp *:* 736/ntpd udp 0 0 *:987 *:* 825/rpcbind udp 0 0 *:43753 *:* 731/avahi-daemon: r udp 0 0 *:mdns *:* 731/avahi-daemon: r udp6 0 0 [::]:26705 [::]:* 442/dhclient udp6 0 0 [::]:sunrpc [::]:* 825/rpcbind udp6 0 0 raspbmc:ntp [::]:* 736/ntpd udp6 0 0 fe80::ba27:ebff:fea:ntp [::]:* 736/ntpd udp6 0 0 [::]:ntp [::]:* 736/ntpd udp6 0 0 [::]:35477 [::]:* 731/avahi-daemon: r |
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sudo netstat -a --programto see which PID / program opened the connection. – HeatfanJohn Oct 13 '12 at 0:17