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I had heard that ICMP is an Etherne
- Thread starter haux
- Start date
Hi,
ICMP is defined in RFC 792 --> . It is mostly used in the 'ping' command and some implementations of 'traceroute' (linux traceroute defaults to UDP packets; -I flag forces ICMP).
Probably what whoever meant was that, normally, the first thing you do to test connectivity is to 'ping' and address to see if you get a response. Its not universally reliable because it is possible to firewall icmp packets and some sysadmins do just that to remain as invisible as possible from crackers. See --> (some of the commands there are ios commands for cisco routers - its just to give you the general idea)
Hope this helps
ICMP is defined in RFC 792 --> . It is mostly used in the 'ping' command and some implementations of 'traceroute' (linux traceroute defaults to UDP packets; -I flag forces ICMP).
Probably what whoever meant was that, normally, the first thing you do to test connectivity is to 'ping' and address to see if you get a response. Its not universally reliable because it is possible to firewall icmp packets and some sysadmins do just that to remain as invisible as possible from crackers. See --> (some of the commands there are ios commands for cisco routers - its just to give you the general idea)
Hope this helps
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