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Linux interface stops receiving packets as seen by tcpdump
Fresh5 days ago
Mar 15, 20262166 viewsConfidence Score0%
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Problem
I have a linux box with two interfaces: eth0 is a builtin and eth1 is a USB-LAN. There is an IP configured on eth1. eth0 is up but no IP is configured. This interface is used for sniffing with tcpdump. The problem is that eth0 frequently stops receiving packets -- my tcpdump captures are empty, and…
Error Output
ifconfig eth0 down; ifconfig eth0 up
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Fix for: Linux interface stops receiving packets as seen by tcpdump
Low Risk
This is probably down to your switch. Sniffing a network in parallel like this either requires a hub or a switch that has the capability to have a port placed in 'monitor mode'. In this mode all traffic to other ports gets duplicated to the monitori…
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