Posts with the tag network debugging
I got the following error message when trying to open a network interface for capture using Wireshark on Mac OS X (Wireshark 1.5.1 Intel 64 beta and 1.4.6 Intel 64 show this behaviour):
There are no interfaces on which a capture can be done.
To solve the problem open a Terminal and...
To list all ports where server software listens to on a computer running Mac OS X, run this in the terminal:
sudo lsof -i -P | grep -i "listen"
Installation on Ubuntu:
sudo aptitude install ipwatchd-gnotify
if configured correctly (true by default) it will show you graphical warnings for IP conflicts as well as create log entries in
/var/log/syslog (check for log messages containing
Advanced configuration options are described and have to be set in the file
/etc/ipwatchd.conf. This could...
A bit less technical than wireshark (does not show single packages in detail):
You can use tcpdump to debug TCP/IP connections.
How it works
1st console run tcpdump:
philipp@lion:~$ sudo tcpdump -i lo tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on lo, link-type EN10MB (Ethernet), capture size 96 bytes 09:55:05.968006 IP lion > lion: ICMP echo request, id 5745, seq 1,...