http://www.spfld.com/ping.html Can select large packet size (ping only) here to test whether your firewall allows fragmented ICMP (as an alternative to using a local command prompt and pinging out to some internet address with large packet). Naturally with Kerio 2.1.5 used by itself, everything went through at 2048 bytes. For some reason, site shows statistics quickly if pings not blocked by firewall, but doesn't seem to provide them (or VERY slow) if blocked by firewall. I sent site owner a message about this. Anyone seen other online tests where packet size can be specified?