Subnet Mask

 

Troubleshooting Traffic across Firewalls

 

First Shell:
tcpdump -penni <external_interface> host <IP> and host <IP> -s0 -w /var/log/TCPExternal.pcap
 
Second Shell:
tcpdump -penni <internal_interface> host <IP> and host <IP>  -s0 -w /var/log/TCPInternal.pcap

Third Shell:
fw monitor -F "0,0,<DST IP>,0,0" -F "<DST IP>,0,0,0,0" -o /var/log/<GW_name>_fw_monitor_bidirectional_traffic.pcap

Fourth Shell:
fw ctl zdebug + drop > traffic_drops.txt