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Combined suggestions and got even more info
I don't know what I'm doing at all, but I decided to combine two of the suggestions already posted by johnqsmith, tice, and doctype to come up with:
sudo lsof -nP | grep TCP and sudo lsof -nP | grep UDP The first one gave me the most information that I could somewhat understand. But in either case, they both gave me more information than any of the other suggestions by themselves. Using sudo lsof -nP | grep TCP, I got: mDNSRespo 33 root 11u IPv4 0x0333eca0 0t0 TCP *:* (CLOSED) netinfod 34 root 7u IPv4 0x02358e8c 0t0 TCP localhost:netinfo-local (LISTEN) netinfod 34 root 8u IPv4 0x0333f69c 0t0 TCP localhost:netinfo-local->localhost:956 (ESTABLISHED) netinfod 34 root 10u IPv4 0x023573ec 0t0 TCP localhost:netinfo-local->localhost:1021 (ESTABLISHED) Directory 45 root 6u IPv4 0x02357740 0t0 TCP localhost:1021->localhost:netinfo-local (ESTABLISHED) Directory 45 root 11u IPv4 0x02f473ec 0t0 TCP *:* (CLOSED) Directory 45 root 33u IPv4 0x03340a94 0t0 TCP *:* (CLOSED) cupsd 367 root 0u IPv4 0x02d587e4 0t0 TCP localhost:ipp (LISTEN) Safari 2519 admin 25u IPv4 0x02e56d44 0t0 TCP 192.168.2.20:52459->scds77.ord.llnw.net:http (CLOSED) lookupd 3770 root 6u IPv4 0x02e56348 0t0 TCP localhost:956->localhost:netinfo-local (ESTABLISHED) And using sudo lsof -i UDP, I got: mDNSRespo 33 root 7u IPv4 0x01fb1ad0 0t0 UDP *:mdns mDNSRespo 33 root 8u IPv6 0x01fb1a00 0t0 UDP *:mdns mDNSRespo 33 root 9u IPv4 0x01fb0340 0t0 UDP 10.0.1.2:52066 mDNSRespo 33 root 12u IPv4 0x01fb0000 0t0 UDP *:mdns netinfod 34 root 6u IPv4 0x01fb1e10 0t0 UDP localhost:netinfo-local syslogd 35 root 17u IPv4 0x01fb1d40 0t0 UDP *:* Directory 45 root 10u IPv4 0x01fb0750 0t0 UDP *:* Directory 45 root 31u IPv4 0x01fb1860 0t0 UDP *:* ntpd 193 root 5u IPv4 0x01fb1ba0 0t0 UDP *:ntp ntpd 193 root 6u IPv4 0x01fb1790 0t0 UDP localhost:ntp ntpd 193 root 7u IPv4 0x01fb1c70 0t0 UDP 192.168.2.20:ntp automount 228 root 8u IPv4 0x01fb0b60 0t0 UDP localhost:1023 automount 234 root 8u IPv4 0x01fb12b0 0t0 UDP localhost:1022 cupsd 367 root 6u IPv4 0x01fb1110 0t0 UDP *:ipp While I don't know what all that means, what I can do is run these commands randomly and keep a log of the results. So I'd then have something to compare with if I'm concerned that something is not going right. I think what might work is to log into my "clean admin" account, run both commands, and log what came up. Then I'd have a baseline to work with that isn't so highly affected by my personal user activities. Does anyone see any problems with this? ---
looks like you've been pwn'ed!
Just kidding.
I put the two in a shell script like this:
And I made it executable by owner, with owner root.
That will remind me to run it with sudo, for more complete results.
For a few records to compare, you could put something like that into a daily or hourly cron job & direct the output into a log file. |
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