I try to find out, wich is the highest possible MTU. So I send a PING -L XXXX -F to the Pix outside, from outside. XXXX is standing for the bytes.
PING xxx.xxx.xxx.xxx -L 992 (and lower) -F
I got a reply
PING xxx.xxx.xxx.xxx -L 993 (up to1472) -F
the ping timed out
PING xxx.xxx.xxx.xxx -L 1473 (and higher) -F
Fragmentation is needed
I don't understand, why it timed out between 993 an 1472.
If i try the same to a router (same internet connection), the ping works up to 1472, with no time out. Upeer 1472 I get the fragmentation message.
Have enyone an answer?