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-rw-r--r--contrib/bind/doc/html/options.html13
1 files changed, 12 insertions, 1 deletions
diff --git a/contrib/bind/doc/html/options.html b/contrib/bind/doc/html/options.html
index f124ebaee567..9e3c0da9961e 100644
--- a/contrib/bind/doc/html/options.html
+++ b/contrib/bind/doc/html/options.html
@@ -70,6 +70,7 @@ options {
[ <A HREF="#sortlist">sortlist</A> { <VAR>address_match_list</VAR> }; ]
[ rrset-order { <VAR>order_spec</VAR> ; [ <VAR>order_spec</VAR> ; ... ] }; ]
[ preferred-glue ( A | AAAA ); ]
+ [ edns-udp-size <VAR>number</VAR>; ]
};
</PRE>
<HR>
@@ -819,6 +820,16 @@ the answer to a priming query. This can be achieved by setting
<CODE>preferred-glue A;</CODE> which will add A records before other types
in the additional section.
+<H4>EDNS</H4>
+
+Some firewalls fail to pass EDNS/UDP messages that are larger than
+certain size, 512 or the UDP reassembly buffer. To allow EDNS to
+work across such firewalls it is necessary to advertise a EDNS
+buffer size that is small enough to not trigger failures.
+<CODE>edns-udp-size</CODE> can be use to adjust the advertised size.
+Values less than 512 will be increased to 512 and values greater than
+4096 will be truncated to 4096.
+
<H4>Tuning</H4>
<DL>
@@ -847,7 +858,7 @@ request for the root servers to be accepted. Default 2.
<HR>
<ADDRESS>
-Last Updated: $Id: options.html,v 1.49 2002/09/09 00:19:17 marka Exp $
+Last Updated: $Id: options.html,v 1.49.6.1 2003/06/02 09:56:33 marka Exp $
</ADDRESS>
</BODY>
</HTML>