Wasn't sure where to put this, so here seems as good as any. I have a 54GL that's been running RAF mod for several years now. I loaded Shibbys K24 tomato-ND-1.28.5x-093-VPN onto it on Monday and since then it's been unable to correctly respond to ICMP pings e.g. this is what happened when I loaded it: Curiously it's shifted into a distinct pattern: Oh and another sever just to be sure: Now I'm no programmer but here are couple of observations. It occurs with both the VNP & SD-VPN builds. It occurs after clearing the nvram thoroughly and manually entering settings manually (several times) as well as after re-flashing. There is no packet loss, it's just the router eating ICMP pings. RAF mod had an identical issue a couple years back (when the xbox upnp broke iirc) - perhaps some underlying bug? I've seen a few people with similar issues on K26 How would I go about determining why this is happening?