Fix typo in docs

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>
Do not set default value for IFUP_EXTRA_SCRIPT

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>
arptables do not support -m comment

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>
Drop packets with different src IP in routed mode

In routed setup do not allow packets coming from a
TAP to have different source IP that the one that they
suppose to have.

This reduces chances for udp attacks originating
inside the datacenter.

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>
Save ip commands as well

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>
Add verbose logging during all stages

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>