Linux Net
netstat
netstat -a
┌─[]─[~] └──? $netstat -a Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:ssh 0.0.0.0:* LISTEN tcp 0 36 nedrain:ssh 36.62.46.62:45402 ESTABLISHED tcp 0 0 nedrain:38802 100.100.30.26:http ESTABLISHED udp 0 0 0.0.0.0:bootpc 0.0.0.0:* udp 0 0 nedrain:ntp 0.0.0.0:* udp 0 0 localhost:ntp 0.0.0.0:* udp 0 0 0.0.0.0:ntp 0.0.0.0:* udp 0 0 0.0.0.0:48935 0.0.0.0:* udp6 0 0 [::]:ntp [::]:* udp6 0 0 [::]:fmp [::]:* Active UNIX domain sockets (servers and established) Proto RefCnt Flags Type State I-Node Path unix 2 [ ] DGRAM 9764 /run/systemd/shutdownd unix 2 [ ACC ] STREAM LISTENING 47257 /usr/local/aegis/Aegis-<Guid(5A2C30A2-A87D-490A-9281-6765EDAD7CBA)> unix 2 [ ACC ] STREAM LISTENING 9581 /run/systemd/private unix 2 [ ACC ] SEQPACKET LISTENING 9615 /run/udev/control unix 2 [ ACC ] STREAM LISTENING 11151 /var/run/dbus/system_bus_socket unix 2 [ ] DGRAM 6873 /run/systemd/notify unix 2 [ ] DGRAM 6875 /run/systemd/cgroups-agent unix 2 [ ACC ] STREAM LISTENING 6887 /run/systemd/journal/stdout
netstat -an You can find more
┌─[]─[~] └──? $netstat -an Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN tcp 0 0 172.19.4.50:55528 122.228.250.176:443 TIME_WAIT tcp 0 0 172.19.4.50:34850 122.228.250.253:443 TIME_WAIT tcp 0 0 172.19.4.50:55524 122.228.250.176:443 TIME_WAIT tcp 0 0 172.19.4.50:47276 122.228.250.177:443 TIME_WAIT tcp 0 0 172.19.4.50:55514 122.228.250.176:443 TIME_WAIT tcp 0 0 172.19.4.50:55504 122.228.250.176:443 TIME_WAIT tcp 0 0 172.19.4.50:47280 122.228.250.177:443 TIME_WAIT tcp 0 36 172.19.4.50:22 36.62.46.62:42658 ESTABLISHED tcp 0 0 172.19.4.50:22 36.62.46.62:45402 ESTABLISHED tcp 0 0 172.19.4.50:34842 122.228.250.253:443 TIME_WAIT tcp 0 0 172.19.4.50:55520 122.228.250.176:443 TIME_WAIT tcp 0 0 172.19.4.50:55506 122.228.250.176:443 TIME_WAIT tcp 0 0 172.19.4.50:38802 100.100.30.26:80 ESTABLISHED tcp 0 0 172.19.4.50:55508 122.228.250.176:443 TIME_WAIT tcp 0 0 172.19.4.50:47290 122.228.250.177:443 TIME_WAIT tcp 0 0 172.19.4.50:55522 122.228.250.176:443 TIME_WAIT udp 0 0 0.0.0.0:68 0.0.0.0:* udp 0 0 172.19.4.50:123 0.0.0.0:* udp 0 0 127.0.0.1:123 0.0.0.0:* udp 0 0 0.0.0.0:123 0.0.0.0:* udp 0 0 0.0.0.0:48935 0.0.0.0:* udp6 0 0 :::123 :::* udp6 0 0 :::4745 :::* Active UNIX domain sockets (servers and established) Proto RefCnt Flags Type State I-Node Path unix 2 [ ] DGRAM 9764 /run/systemd/shutdownd unix 2 [ ACC ] STREAM LISTENING 47257 /usr/local/aegis/Aegis-<Guid(5A2C30A2-A87D-490A-9281-6765EDAD7CBA)> unix 2 [ ACC ] STREAM LISTENING 9581 /run/systemd/private unix 2 [ ACC ] SEQPACKET LISTENING 9615 /run/udev/control unix 2 [ ACC ] STREAM LISTENING 11151 /var/run/dbus/system_bus_socket unix 2 [ ] DGRAM 6873 /run/systemd/notify unix 2 [ ] DGRAM 6875 /run/systemd/cgroups-agent unix 2 [ ACC ] STREAM LISTENING 6887 /run/systemd/journal/stdout unix 5 [ ] DGRAM 6890 /run/systemd/journal/socket unix 11 [ ] DGRAM 6892 /dev/log unix 3 [ ] STREAM CONNECTED 14999 unix 2 [ ] DGRAM 12242 unix 3 [ ] STREAM CONNECTED 10749 unix 2 [ ] DGRAM 51268 unix 2 [ ] DGRAM 12998 unix 3 [ ] STREAM CONNECTED 10750 unix 2 [ ] DGRAM 10740 unix 3 [ ] STREAM CONNECTED 13357 unix 3 [ ] STREAM CONNECTED 11202 unix 3 [ ] STREAM CONNECTED 13358 /var/run/dbus/system_bus_socket unix 3 [ ] STREAM CONNECTED 11675 /var/run/dbus/system_bus_socket unix 3 [ ] STREAM CONNECTED 47255 unix 3 [ ] STREAM CONNECTED 13544 /run/systemd/journal/stdout unix 3 [ ] STREAM CONNECTED 11214 unix 3 [ ] STREAM CONNECTED 10518 /run/systemd/journal/stdout unix 3 [ ] STREAM CONNECTED 11674 unix 3 [ ] STREAM CONNECTED 10394 unix 3 [ ] STREAM CONNECTED 11215 unix 3 [ ] STREAM CONNECTED 12629 unix 3 [ ] STREAM CONNECTED 11203 /run/systemd/journal/stdout unix 3 [ ] DGRAM 10629 unix 3 [ ] STREAM CONNECTED 12630 /run/systemd/journal/stdout unix 2 [ ] DGRAM 10401 unix 3 [ ] DGRAM 10628 unix 3 [ ] STREAM CONNECTED 11764 unix 2 [ ] DGRAM 51826 unix 3 [ ] STREAM CONNECTED 15000 /run/systemd/journal/stdout unix 2 [ ] DGRAM 14235 unix 3 [ ] STREAM CONNECTED 13540 unix 2 [ ] DGRAM 11631 unix 3 [ ] STREAM CONNECTED 11535 unix 3 [ ] STREAM CONNECTED 11536 /run/systemd/journal/stdout unix 3 [ ] STREAM CONNECTED 11765 /run/systemd/journal/stdout unix 2 [ ] DGRAM 11927 unix 2 [ ] DGRAM 13601 unix 2 [ ] DGRAM 11893 unix 3 [ ] STREAM CONNECTED 11958 /var/run/dbus/system_bus_socket unix 3 [ ] STREAM CONNECTED 47254 unix 3 [ ] STREAM CONNECTED 11957 unix 3 [ ] STREAM CONNECTED 47253 unix 3 [ ] STREAM CONNECTED 11216 /var/run/dbus/system_bus_socket unix 3 [ ] STREAM CONNECTED 11162 unix 3 [ ] STREAM CONNECTED 47256 unix 2 [ ] DGRAM 11973
and may do something like this : netstat -an | grep ESTABLISHED | wc -l
netstat -tuln
┌─[]─[~] └──? $netstat -tuln Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN udp 0 0 0.0.0.0:68 0.0.0.0:* udp 0 0 172.19.4.50:123 0.0.0.0:* udp 0 0 127.0.0.1:123 0.0.0.0:* udp 0 0 0.0.0.0:123 0.0.0.0:* udp 0 0 0.0.0.0:48935 0.0.0.0:* udp6 0 0 :::123 :::* udp6 0 0 :::4745 :::*
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