Tom hi,

Back in 2011 you added the TTL target in tcrules per my request:

http://www.mail-archive.com/[email protected]/msg12420.html

Today I tried adding the rule to tcrules in shorewall 4.5.5.3 on the
following (typical) setup:

Internet -> eth0(in) -> Shorewall -> eth1(out) -> internal hosts

/etc/shorewall/tcrules:
TTL(+1)  eth0  eth1  all

With said Shorewall version, I found that TTL is only allowed to be
added to the FORWARD chain in the mangle table. However, in order to
hide 'Shorewall' from e.g. traceroute in the above setup,
 it has to be
added to the PREROUTING chain of the mangle table. Currently this is not
allowed. Could you please make it possible? In other words:

TTL(+1):P  eth0  eth1  all

Thank you,

-- 
Stay in touch,
Mark van Dijk.                  ,------------------------------------
-------------------------------'            Tue Aug 28 17:57 UTC 2012
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