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Linux box drops the incoming packets

 
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# 1  
Old 07-02-2010
Linux box drops the incoming packets
Hi all,
I am new to Linux kernel.
we have a c file that counts the no. of sends and received packets in each interface, and indicate the user about the error/drop ration of incoming and outgoing packets.

in our Linux box [red hat - kernel 2.6.9.67], the incoming packets are dropped at random interval.

we have our custom net-filter modules, ipip module, and a netconsole log files that has the printk messages.

how to find the cause for the dropped packets.

is the tcpdump tool is helpful to find the details of dropped packets?
how to start to find the cause of the drop packets
# 2  
Old 07-02-2010
do u have firewall enabled ? which also may be the cause for rejection of packets.
 
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