We have simple setup of firewall/gateway at out office using iptables. The public IP address is on eth2 and eth1 is local ip address (local static) and it runs dhcp server on it. Normally we keep some data on it.
From past few days as we observed the content the copied from firewall/gateway to any local machine the data will be copied from the External IP to local machine.When a large data flow occurs the wireless goes down sometime.
The tcpdump shows the packets are coming from external interface. My question is when the firewall/gateway has local ip 192.168.5.7 and the data getting copied / syncing from external interface to any local machine. WHY?