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Added ICMP type 3 (destination unreachable) to the list commonly used

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ICMP types.  Slightly reformat ICMP list while I'm here.
This commit is contained in:
Alexander Langer 1999-01-21 23:39:51 +00:00
parent aa56ae8808
commit dc740a5d4b
Notes: svn2git 2020-12-08 03:00:23 +00:00 
svn path=/head/; revision=4093
1 changed files with 8 additions and 5 deletions
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13
handbook/firewalls.sgml
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@ -1,4 +1,4 @@
<!-- $Id: firewalls.sgml,v 1.20 1998-04-08 11:52:40 cracauer Exp $ -->
<!-- $Id: firewalls.sgml,v 1.21 1999-01-21 23:39:51 alex Exp $ -->
<!-- The FreeBSD Documentation Project -->
<sect><heading>Firewalls<label id="firewalls"></heading>
@ -333,10 +333,13 @@ by a leading '!'.
<tag/icmptypes <em>types</em>/Matches if the ICMP type is present in
the list <em>types</em>. The list may be specified as any combination
of ranges and/or individual types separated by commas. Commonly used
ICMP types are: <bf>0</bf> echo reply (ping reply), <bf>5</bf>
redirect, <bf>8</bf> echo request (ping request), and <bf>11</bf>
time exceeded (used to indicate TTL expiration as with
<tt>traceroute(8)</tt>).
ICMP types are:
<bf>0</bf> echo reply (ping reply),
<bf>3</bf> destination unreachable,
<bf>5</bf> redirect,
<bf>8</bf> echo request (ping request), and
<bf>11</bf> time exceeded (used to indicate TTL
expiration as with <tt>traceroute(8)</tt>).
</descrip>