Decrement TTL of incoming packets.

[tinc] / doc / tinc.conf.5.in

diff --git a/doc/tinc.conf.5.in b/doc/tinc.conf.5.in
index 746d820..8d8e6f1 100644 (file)
--- a/doc/tinc.conf.5.in
+++ b/doc/tinc.conf.5.in
@@ -168,6 +168,14 @@ If you don't specify a host with
 won't try to connect to other daemons at all,
 and will instead just listen for incoming connections.
 
+.It Va DecrementTTL Li = yes | no Po yes Pc
+When enabled,
+.Nm 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.
+
 .It Va Device Li = Ar device Po Pa /dev/tap0 , Pa /dev/net/tun No or other depending on platform Pc
 The virtual network device to use.
 .Nm tinc