Decrement TTL of incoming packets.

[oweals/tinc.git] / doc / tinc.texi

diff --git a/doc/tinc.texi b/doc/tinc.texi
index 3bb4407604c46be144621b352f18990343b25cf9..4b985dcd77e4240608b56b87f5128bde037e7f82 100644 (file)
--- a/doc/tinc.texi
+++ b/doc/tinc.texi
@@ -785,6 +785,13 @@ If you don't specify a host with ConnectTo,
 tinc won't try to connect to other daemons at all,
 and will instead just listen for incoming connections.
 
 tinc won't try to connect to other daemons at all,
 and will instead just listen for incoming connections.
 

+@cindex DecrementTTL
+@item DecrementTTL = <yes | no> (yes)
+When enabled, tinc will decrement the Time To Live field in IPv4 packets, or the Hop Limit field in IPv6 packets,
+before forwarding a received packet to the virtual network device or to another node,
+and will drop packets that have a TTL value of zero,
+in which case it will send an ICMP Time Exceeded packet back.
+

 @cindex Device
 @item Device = <@var{device}> (@file{/dev/tap0}, @file{/dev/net/tun} or other depending on platform)
 The virtual network device to use.
 @cindex Device
 @item Device = <@var{device}> (@file{/dev/tap0}, @file{/dev/net/tun} or other depending on platform)
 The virtual network device to use.