Which process is accessing which IPs?

Question

After installing Conky and listing all my inbound and outbound connections I start to wonder what's actually happening and what and why things are happening.

screenshot

I'm getting a bit suspicious. How can I know which process is accessing which of these addresses?

Wireshark is a better graphical tool for this sort of information then Conky. — Panther, May 08 '15 at 17:05
@bodhi.zazen - would be nice if you could share a page with know-how related to my question (configuration especially). Wireshark is a huge tool which can do much more than only "sort information". And I use conky mostly for different purposes. In that case it was just a cool feature — Qohelet, May 08 '15 at 17:14
What sort of information do you want ? How to wireshark ? How to interpret network traffic ? How to configure conky ? How to lsof ? netstat ? — Panther, May 08 '15 at 17:18
@bodhi.zazen: To configure wireshark so it solves my problem — Qohelet, May 11 '15 at 06:23

guntbert · Accepted Answer · 2024-06-30T15:38:20.220

If you only want to see those connections that arouse your suspicion you can really use lsof.

sudo lsof -i | egrep -i "cloudfront|poneytelecom|dark"

lsof -i restricts the output to internet connections.
Use egrep (instead of grep) to be able to supply alternatives in the search string (separated by |), -i tells egrep to ignore case (DARK vs. dark).

If you have IP-addresses instead of hostnames use

sudo lsof -ni | egrep -i "10\.0\.8|193\.170"

score 2 · Answer 2 · answered May 08 '15 at 20:16

2

My favorite tool dealing with processes and network usage is nethogs (install it with sudo apt-get install nethogs).

This tool displays every process and the bandwidth it consumes, it doesn't show the IP-addresses where the processes are connecting though. You may have to start it with the interface name, e.g. sudo nethogs wlan0.

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answered May 08 '15 at 20:16

guntbert

13,485

Even thought it doesn't answer my question to which host the program is connecting I find this answer really useful. I would give it an upvote if I could... – Qohelet May 11 '15 at 06:23

score 1 · Answer 3 · answered May 08 '15 at 17:30

1

You can run lsof -n|grep TCP to know which programs are connecting to which IPs.

answered May 08 '15 at 17:30

dobey

41,690

that only captures some traffic – Panther May 08 '15 at 17:39
Sure, it only shows TCP. You can drop the |grep TCP and it will show everything, including all file access and such. – dobey May 08 '15 at 19:28

Which process is accessing which IPs?

3 Answers3