Source NAT

[Guest]

[mmiat]

Hi

I've configured an ipsec vpn between me and a customer (so I don't have access to his gateway)

my lan is 192.168.10.0/24, his is 10.128.0.0/12. however, he told me to source nat my ip addresses to 10.143.144.0/29

but when I try to configure it in EFW, it tells me that source netmask and mapped netmask have to be same length. How I have to do / fix it?

Thanks

[mmiat]

solved
using shell this rule works:

iptables -t nat -I SOURCENAT 1 -j NETMAP -p tcp -s 192.168.10.0/24 -d 10.128.0.0/12 --to 10.143.144.113/32

this time endian sucks, linux rulez

now I have to find how to start this rule when system boot or endian web interface change something