hi

i've asked lately if i'm on the right track to do nat, providers and rtrules.
Thanks Tom for your reply!

Finally I got it working and I'd like to share it as an example. 

- Thomas


Situation: 
* Shorewall 4.5.5.3
* OS: Debian Squeeze
* eth0 with ip 8.8.8.8 and ip alias 7.7.7.7 (eth0:0)
* 8.8.8.8 has default gateway 8.8.8.1
* 7.7.7.7 has default gateway 7.7.7.1
* internal lan is 10.7.7.0/24
* 10.7.7.13 is 7.7.7.7 external
* all others get 8.8.8.8 external


And are the relevant config files:


############################################################################################
# providers
############################################################################################
#NAME   NUMBER  MARK    DUPLICATE       INTERFACE       GATEWAY         OPTIONS 
        COPY
cs1     1       1       main            eth0:8.8.8.8    8.8.8.1
cs2     2       2       main            eth0:7.7.7.7    7.7.7.1


####################################################################################
# rtrules
####################################################################################
#SOURCE                 DEST                    PROVIDER        PRIORITY        
MASK
17.7.7.13               -                       cs2             1000
10.7.7.0/24             -                       cs1             1000


###############################################################################
# masq
###############################################################################
#INTERFACE              SOURCE          ADDRESS         PROTO   PORT(S) IPSEC   
MARK
eth0:0(cs2)             10.7.7.13       7.7.7.7
eth0(cs1)               0.0.0.0/0       8.8.8.8



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