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Bug#783958: linux-image-3.16.0-4-amd64: iptables fails to work with jessie's kernel



Package: linux-image-3.16.0-4-amd64
Version: 3.16.7-ckt9-3~deb8u1
Severity: important

A simple test with iptables against Jessie's default kernel fails to work, but using a custom kernel not from repositories and iptables works. A simple test is done allowing one match rule, and it can immediately be seen there is a problem with either iptables or Jessie's default kernel of 3.16.0-4-amd64.

eg,
iptables -I INPUT -p tcp --dport 22 -j ACCEPT
iptables -P INPUT DROP

traffic to port 22 later works if I apply iptables -P INPUT ACCEPT
Using a non-stock kernel, the above example works exactly as expected. Since iptables can work with another kernel then I suppose there is something wrong with linux-image-3.16.0-4-amd64 preventing iptables from working.

please have a look
thanks


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