[sslh] Transparent mode, not to localhost

[mictee]

Hi list,

I'm trying to use sslh in transparent mode, like documented in the 
readme: https://github.com/yrutschle/sslh#transparent-proxy-support. 
Only in my case, the servers that sslh is forwarding traffic to are 
actually on different machines. It's not working, and I think it might 
be because I don't fully understand what the firewall and routing 
settings are doing. I edited them the best I could for my situation:

iptables -t mangle -F
iptables -t mangle -N SSLH
iptables -t mangle -A OUTPUT --protocol tcp --out-interface eth0 --sport 
22 --jump SSLH
iptables -t mangle -A OUTPUT --protocol tcp --out-interface eth0 --sport 
80 --jump SSLH
iptables -t mangle -A OUTPUT --protocol tcp --out-interface eth0 --sport 
443 --jump SSLH
iptables -t mangle -A SSLH --jump MARK --set-mark 0x1
iptables -t mangle -A SSLH --jump ACCEPT
ip rule add fwmark 0x1 lookup 100
ip route add local 0.0.0.0/0 dev lo table 100

When I run sslh-fork with --transparent and run the above script, none 
of my (previously working) setup seems to work anymore. In my syslog I 
find:

systemd[1]: Starting SSL/SSH multiplexer...
systemd[1]: Started SSL/SSH multiplexer.
sslh-fork[67]: sslh-fork zip-2014-02-11 started
sslh-fork[67]: forward to ssl failed:connect: Connection timed out
sslh-fork[67]: connect: Connection timed out
sslh-fork[67]: forward to ssl failed:connect: Connection timed out
sslh-fork[67]: connect: Connection timed out
sslh-fork[67]: forward to ssl failed:connect: Connection timed out
sslh-fork[67]: connect: Connection timed out

Does anybody have a hint? I'm not even sure where to look.

Thanks a bunch in advance!
mictee