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Old 05-15-2012, 05:33 PM   #1
captainkrypto
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Registered: Dec 2004
Location: Florida
Distribution: Fedora 18
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Port forwarding on vpn router client


I am new to advanced networking so please forgive me.

I have set up my router as a VPN client using dd-wrt. Everything works great and I can selectively tunnel specific computers on the network through VPN. I have a computer acting as a web server using the VPN tunnel, but I am unable to hit it thought the VPN connection or WAN connection as the port does not appear to be open.

I have tried manually forwarding the port with the following:

Code:
iptables -t nat -I PREROUTING -i tun1 -p tcp --dport 80 -j DNAT --to-destination 192.168.1.42:80
which results in the following iptable rules:

Code:
root@RT-N16-MAIN:~# iptables -t nat -L -n -v
Chain PREROUTING (policy ACCEPT 517 packets, 53289 bytes)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 DNAT       tcp  --  tun1   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:80 to:192.168.1.42:80 
    0     0 DNAT       icmp --  *      *       0.0.0.0/0            71.xxx.xxx.166      to:192.168.1.1 
  170 20304 TRIGGER    0    --  *      *       0.0.0.0/0            71.xxx.xxx.166      TRIGGER type:dnat match:0 relate:0 

Chain POSTROUTING (policy ACCEPT 27 packets, 1567 bytes)
 pkts bytes target     prot opt in     out     source               destination         
  158 10242 MASQUERADE  0    --  *      tun1    0.0.0.0/0            0.0.0.0/0           
  175 20257 SNAT       0    --  *      vlan2   192.168.1.0/24       0.0.0.0/0           to:71.xxx.xxx.166 
    0     0 RETURN     0    --  *      br0     0.0.0.0/0            0.0.0.0/0           PKTTYPE = broadcast 
    2   586 MASQUERADE  0    --  *      br0     192.168.1.0/24       192.168.1.0/24      

Chain OUTPUT (policy ACCEPT 155 packets, 10331 bytes)
 pkts bytes target     prot opt in     out     source               destination
I was hoping that someone can point me in the right direction to get this working. Sorry if I didn't provide enough info, but let me know if further info is needed. Any help/suggestions/direction is much appreciated!

Thanks!
 
Old 05-16-2012, 11:34 AM   #2
captainkrypto
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Registered: Dec 2004
Location: Florida
Distribution: Fedora 18
Posts: 15

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Can someone even give me a high level overview of the next step so I can research further? Or point me in the right direction? Or even a guide or something? I've been trying to figure out this for weeks, and my knowledge level on the subject is very low. Thanks!
 
Old 05-08-2013, 05:38 PM   #3
b0rked
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Registered: May 2013
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Surely someone else has run into this?

As much I can't stand +1 replies, I too have been trying to sort this out. There must be others out there who have ran into this?
 
Old 05-09-2013, 08:48 AM   #4
captainkrypto
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Registered: Dec 2004
Location: Florida
Distribution: Fedora 18
Posts: 15

Original Poster
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I've searched for a solution for some time and, someone can correct me if I am wrong, but I don't think it is possible to forward ports through a VPN tunnel without some kind of setup on the VPN provider/server side. I've seen some VPN providers with the ability to do this, but haven't yet implemented anything myself.
 
  


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