Technical Tip: How to validate ICMP reply package using 'validate-reply' option

[Pedro_FTNT]

Description	This article describes how to use 'ping-options validate-reply'. This option helps to validate ICMP reply packages and use 'adaptive-ping enable' to do a 'Fast PING'.
Scope	FortiGate.
Solution	Example to use 'validate-reply yes' and 'adaptive-ping enable' to send 20 ICMP packages, fast PING with reply validation: exe ping-options validate-reply yes exe ping-options adaptive-ping enable exe ping-options repeat-count 20 exe ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8): 56 data bytes data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=0 ttl=117 time=4.9 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=1 ttl=117 time=4.8 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=2 ttl=117 time=4.8 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=3 ttl=117 time=4.8 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=4 ttl=117 time=4.8 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=5 ttl=117 time=4.8 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=6 ttl=117 time=4.9 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=7 ttl=117 time=4.8 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=8 ttl=117 time=4.8 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=9 ttl=117 time=4.8 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=10 ttl=117 time=4.8 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=11 ttl=117 time=4.8 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=12 ttl=117 time=4.8 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=13 ttl=117 time=4.9 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=14 ttl=117 time=5.0 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=15 ttl=117 time=4.9 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=16 ttl=117 time=4.9 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=17 ttl=117 time=4.8 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=18 ttl=117 time=4.9 ms data reply validate correct. 64 bytes from 8.8.8.8: icmp_seq=19 ttl=117 time=4.9 ms --- 8.8.8.8 ping statistics --- 20 packets transmitted, 20 packets received, 0% packet loss round-trip min/avg/max = 4.8/4.8/5.0 ms Related documents: Technical Tip: How to run a 'Fast PING' using 'adaptive-ping enable' option Troubleshooting Tip: Using PING options from CLI  Troubleshooting Tip: Using PING options from the FortiGate CLI