On 3/17/13 9:46 AM, "TJ" <[email protected]> wrote:

>
>$ sudo tcpdump -ni tun0 port 80 or tcp port 3128
>listening on tun0, link-type RAW (Raw IP), capture size 65535 bytes
>16:25:12.024613 IP 82.71.24.87.39176 > 91.189.92.201.80: Flags [S], seq
>1971087366, win 14520, options [mss 1452,sackOK,TS val 168165226 ecr
>0,nop,wscale 4], length 0
>16:25:13.023137 IP 82.71.24.87.39176 > 91.189.92.201.80: Flags [S], seq
>1971087366, win 14520, options [mss 1452,sackOK,TS val 168165476 ecr
>0,nop,wscale 4], length 0
>
>Notice the source IP on tun0 is the IP of ppp0. This was why I added the
>MASQ entry:
>
>/etc/shorewall/masq
>#INTERFACE             SOURCE          ADDRESS         PROTO   PORT(S) IPSEC   
>MARK
>ppp0   10.0.0.0/8,169.254.0.0/16,172.16.0.0/12,192.168.0.0/16  82.71.24.87
>#ppp1  10.0.0.0/8,169.254.0.0/16,172.16.0.0/12,192.168.0.0/16  82.71.24.87
>eth9   br0
>tun0    10.0.0.0/8,127.0.0.0/8 10.254.252.18
>#tun0    br0
>

That masq entry certainly won't change the SOURCE ip from 82.71.24.87 to
10.254.252.18. It only works for 10.0.0.0/8 in the SOURCE (you can't NAT
127.0.0.0/8 so that part of the rule is just extra noise).

>
-Tom
You do not need a parachute to skydive. You only need a parachute to
skydive twice.





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