less /usr/include/netinet/ip_icmp.h The stuff that I think you want starts around line 135.
Looking at a copy of Stevens TCP/IP Illustrated vol. 1 might also
help, but I always just read the header file to find out what's what.
--eli
In reply to "Peter Brezny" <[EMAIL PROTECTED]> :
> Hi Everyone,
>
> Where can i find an explanation of the different icmp types.
>
> I ran across some standard firewall rulesets that say these types are
> required:
> # Allow required ICMP
> $fwcmd add allow icmp from any to any icmptypes 3,4,11,12 keep-state
>
> And now I've got a cisco router that's wanting a response from an icmp type
> 5.
>
> What is type 5 for, and where can i get some more info on the different
> types in an icmp packet.
>
> Well, I just partly answered my question with a quick google search for icmp
> type
>
> http://www.iana.org/assignments/icmp-parameters
>
>
> However, I'm still needing some more info. Why would my router be sending
> redirect ICMP info to this host?
>
> And are the required ICMP types in the firewall rule above really adequate?
>
> Here's what's showing up in the system report:
> > ipfw: 65435 Deny ICMP:5.0 router.ip.address host.ip.adress in via xl0
>
> Where the host has only the following icmp types allowed.
>
> # Allow required ICMP
> $fwcmd add allow icmp from any to any icmptypes 3,4,11,12 keep-state
>
> Thanks,
>
> Peter Brezny
> purplecat.net
>
>
> To Unsubscribe: send mail to [EMAIL PROTECTED]
> with "unsubscribe freebsd-net" in the body of the message
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