liaodalin19903's profile - activity

thank you, this works.

I followed the official documentation.

My remote-server is CentOS 7.9, and I have installed the wireshark in it.

I use the below command to open my local wireshark software to capture the remote-server's interface packet:

ssh root@remote-server-name 'dumpcap -w - -f "not port 22"' | wireshark -k -i -

but I get error information:

Capturing on 'nflog'
dumpcap: Invalid capture filter "not port 22" for interface nflog!

That string isn't a valid capture filter (NFLOG link-layer type filtering not implemented).
See the User's Guide for a description of the capture filter syntax.

and my local wireshark software displayed an error dialog with

End of file pipe magic during open.

I use the below command to special the interface:

ssh root@remote-server-name -i .ssh/id_rsa 'dumpcap -w - -f "not port 22"' | wireshark -k -i em1

but the wireshark says there is no such device, with an error dialog

The capture session could not be initiated
on interface 'em1' (No such device exists).

Please check that you have the proper
interface or pipe specified.

in my server there exist the em1 indeed.

[root@att ~]# ip a | grep em1
2: em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
inet remote-ip/29 brd remote-ip scope global noprefixroute em1

EDIT-01

I print the interfaces:

$ ssh root@att -i .ssh/id_rsa 'dumpcap -D'
1. bridge0
2. docker0
3. nflog
4. nfqueue
5. em1
6. usbmon1
7. em2
8. veth8b8f97a
9. vethfe9fbcf
10. br-eb92c719d431
11. veth5587e98
12. any
13. lo (Loopback)

@GuyHarris Check my edit

Problem trying to capture on a remote machine using ssh to run dumpcap on the remote machine I followed the official doc

MacOS wireshark Remote Capture issue. Hi, friends: I asked a question about wireshark Remote Capture in there: https:/

@grahamb I have updated my post with detail, please reopen it. thank you.

MacOS wireshark Remote Capture issue. Hi, friends: I asked a question about wireshark Remote Capture in there: https:/

MacOS wireshark Remote Capture issue. Hi, friends: I asked a question about wireshark Remote Capture in there: https:/

I have several questions about wireshark packet.

1. why when I request a website, there will get two TCP connection? you see the first two packets60907 -> 80 and 60908->80

2.what's the tcp.analysis ? and tcp.analysis.flags?

3.is it possible to sort the TCP connection packets by each connect? I mean, if there have two TCP connections, you see the 1-6 packet. is it possible to list like: 1 3 5 2 4 6

@grahamb I have three questions in my post, why close this post?

what's the `tcp.analysis` ? and `tcp.analysis.flags`? I have several questions about wireshark packet. why when I

what's the `tcp.analysis` ? and `tcp.analysis.flags`? I have several questions about wireshark packet. why when I