I have a site to site vpn tunnel configured between an PA and Checkpoint FW. I control the PA side but no the Checkpoint side. The tunnel is showing up but traffic has stopped flowing across. I see were there were encaps and decaps at one time but the counters havent increased in for a few days. I have checked the IKE gateways, ProxyIDs, IPSec tunnel settings. Wondering what could make the traffic stop flowing.