Re: netfilter .. (openswan) nat problem ..

[Jeho Park <jhpark-nf-user@kernelproject.org>]

as i know, this problem was patched from 2.6.16

so you will need to upgrade kernel or apply that patch

Lars Nixdorf wrote:

>i have to solv the following problem (debian 3.1, kernel 2.6.14 from kernel
>org, no patches, openswan 2.x.x maybe important):
>
>netA - gwA - gwB - netB - internet, where 
>
>netA: 192.168.0.0/24
>gwA: 192.168.0.1 + pppoe-ip-addr
>gwB: 100.100.100.100 (static official ip)
>netB: 100.100.100.100/32 (no real subnet)
>
>gwA and gwB are both real gateways
>
>tunnel works in the following way:
>
>netA/gwA to netB/gwB and netB/gwB to netA/gwA, all I think .
>
>now I want to forward a spezial port on gwB, perhaps 50000 to an address in
>netA (192.168.0.100:50000), ok np from gwB, but ! I could not connect from
>the internet over gwB to this spezial host
>
>my nat rules, nothing else ..
>
>iptables -t nat -A PREROUTING -j DNAT -p tcp -s 0/0 --dport 50000
>--to-destination 192.168.0.100:50000 -i eth0 iptables -t nat -A POSTROUTING
>-j SNAT -p tcp -d 192.168.0.100 --dport 50000 --to 100.100.100.100 -o eth0
>
>tcpdump tell me that all nat works, but no traffic on gwA interfaces
>received. gwB send it, but I have a [DF] in that lines, maybe important, I
>doesn't know
>
>any suggestions? someone could help?
>
>
>
>regards, ji
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