WHR-G300N PPTP Client - Can't Connect to VPN-Sever IPs

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MaGo81
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Joined: 16 Feb 2009
Posts: 18
PostPosted: Mon Oct 26, 2009 16:30    Post subject: WHR-G300N PPTP Client - Can't Connect to VPN-Sever IPs Reply with quote
Hi guys

I have a pptp-connection between two dd-wrt devices.
Client: WHR-G300N (dd-wrt 13064) Net 192.168.13.0
Server: WHR-HP-AG108 (dd-wrt 12533) Net: 192.168.12.0

Problem:

I can ping the vpn-server ip(192.168.12.1) from within the vpn-client(ssh 192.168.13.1) but not from the lan-clients(e.g. 192.168.13.102) of the vpn-client.

What kind of routing magic do I have to set up?
Tracert shows me, that my lan-clients take the vpn-client(192.168.13.1) as gateway for all 192.168.12.0 addresses.
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Drizzt81
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PostPosted: Mon Oct 26, 2009 19:53    Post subject: Reply with quote
I have the same issue, even though I configured "advanced routing" on both Routers (WHR-G300n, client and WRT54G, server).
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MaGo81
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PostPosted: Mon Nov 02, 2009 23:20    Post subject: Reply with quote
Come on.. Has nobody a solution to this?
This feature (linking two offices) is important, or is it not?

Please!
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scarpeta
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Joined: 29 Nov 2007
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PostPosted: Wed Nov 04, 2009 12:55    Post subject: Reply with quote
MaGo81 wrote:
Come on.. Has nobody a solution to this?
This feature (linking two offices) is important, or is it not?

Please!


I am using two WHR-G300Ns to set up a pptp connection between two homes, and it works like a charm the 1st time I try.

Show us your server AND client setup, then maybe I or someone else can tell what has gone wrong.
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MaGo81
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Joined: 16 Feb 2009
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PostPosted: Mon Nov 09, 2009 13:10    Post subject: Reply with quote
hope this helps for finding the problem:

client:


host:

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scarpeta
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Joined: 29 Nov 2007
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PostPosted: Tue Nov 10, 2009 3:25    Post subject: Reply with quote
Your setup is almost identical to mine, except I enabled NAT under PPTP client options.

How about your Advanced Routing settings? It's a must, otherwise you can't create the 'tunnel' between two sites. If you haven't done so already, please look at this: http://www.dd-wrt.com/wiki/index.php/Point-to-Point_PPTP_Tunneling_with_two_DD-WRT

Hope this helps.
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MaGo81
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Joined: 16 Feb 2009
Posts: 18
PostPosted: Tue Nov 10, 2009 12:51    Post subject: Reply with quote
Thanks for your help, the problem is solved!

Very Happy

But it is strange though.

I enabled NAT - like often before -, by hitting apply nothing changed BUT with rebooting the router I could connect to the vnp-host and his clients!

But the vpn-host-router could not connect to my clients. "sure thing" I thought, because the NAT is enabled, but I followed the tutorial anyway and set up the routing rule on the now accessible web interface of the vpn-host-router, reboot, and then it worked.
But why having a NAT-option which appears to be useless? So I disabled it on the vpn-client, saved, set up the vpn routing rule on the client too, saved, reboot, all fine!

All vnp-server-clients can see all vpn-client-clients, vice versa.

Not, that I didn't tried the routing rules or the NAT option in the first place.. but I trusted the "apply button". Saving and rebooting seems to be the right way.
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Drizzt81
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PostPosted: Tue Nov 10, 2009 21:18    Post subject: Reply with quote
Is it possible to enable the PPTP Server on a client node? I am having some issues with one of my routers:

I can ping the "central lan" just fine, but I cannot ping the other way.
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MaGo81
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PostPosted: Tue Nov 10, 2009 21:23    Post subject: Reply with quote
Can you give some more detailed information on this?
Whats your setup? which way works, which does not?
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Drizzt81
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PostPosted: Tue Nov 10, 2009 21:51    Post subject: Reply with quote
Hi,

so I have a total of 4 sites. I have a perfectly fine connection between two sites (Routers HamRoute

(WRT54G) and MarcRoute (WRT54GL), subnets 192.168.2.0 and 192.168.16.0 restively).

See:
Code:

root@HamRoute:~# ping 192.168.16.1
PING 192.168.16.1 (192.168.16.1): 56 data bytes
64 bytes from 192.168.16.1: seq=0 ttl=64 time=58.701 ms
64 bytes from 192.168.16.1: seq=1 ttl=64 time=54.928 ms
64 bytes from 192.168.16.1: seq=2 ttl=64 time=56.970 ms

--- 192.168.16.1 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 54.928/56.866/58.701 ms

root@HamRoute:~# ping 192.168.16.36
PING 192.168.16.36 (192.168.16.36): 56 data bytes
64 bytes from 192.168.16.36: seq=0 ttl=63 time=55.000 ms
64 bytes from 192.168.16.36: seq=1 ttl=63 time=56.206 ms

--- 192.168.16.36 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 55.000/55.603/56.206 ms
root@HamRoute:~#


I am trying to add a new Router (HolzRoute (WHR-G300n) subnet 192.168.4.0). This router is supposed to connect

to HamRoute, which I want to use as my hub. As we can see from the routing table at HamRoute, the routing is

set up correctly. However I cannot ping HolzRoute (192.168.4.1) from HamRoute:

Code:

root@HamRoute:~# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
213.191.89.20   *               255.255.255.255 UH    0      0        0 ppp0
192.168.4.1     *               255.255.255.255 UH    0      0        0 ppp1
192.168.16.1    *               255.255.255.255 UH    0      0        0 ppp2
192.168.4.0     192.168.4.1     255.255.255.0   UG    0      0        0 ppp1
192.168.2.0     *               255.255.255.0   U     0      0        0 br0
192.168.16.0    192.168.16.1    255.255.255.0   UG    0      0        0 ppp2
169.254.0.0     *               255.255.0.0     U     0      0        0 br0
127.0.0.0       *               255.0.0.0       U     0      0        0 lo
default         lo1.br01.fra.de 0.0.0.0         UG    0      0        0 ppp0

root@HamRoute:~# ping 192.168.4.1
PING 192.168.4.1 (192.168.4.1): 56 data bytes

--- 192.168.4.1 ping statistics ---
3 packets transmitted, 0 packets received, 100% packet loss


The Routing table at HolzRoute looks similar. However, I can ping both HamRoute and a server in the

192.168.2.0 network:

Code:

root@HolzRoute:~# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
88.68.192.1     *               255.255.255.255 UH    0      0        0 ppp0
192.168.2.1     *               255.255.255.255 UH    0      0        0 ppp1
192.168.4.50    *               255.255.255.255 UH    0      0        0 ppp2
192.168.4.0     *               255.255.255.0   U     0      0        0 ppp1
192.168.4.0     *               255.255.255.0   U     0      0        0 br0
192.168.50.0    192.168.2.1     255.255.255.0   UG    0      0        0 ppp1
192.168.2.0     192.168.2.1     255.255.255.0   UG    0      0        0 ppp1
169.254.0.0     *               255.255.0.0     U     0      0        0 br0
127.0.0.0       *               255.0.0.0       U     0      0        0 lo
default         dslb-088-068-19 0.0.0.0         UG    0      0        0 ppp0

root@HolzRoute:~# ping 192.168.2.1
PING 192.168.2.1 (192.168.2.1): 56 data bytes
64 bytes from 192.168.2.1: seq=0 ttl=64 time=59.937 ms
64 bytes from 192.168.2.1: seq=1 ttl=64 time=51.673 ms

--- 192.168.2.1 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 51.673/55.805/59.937 ms
root@HolzRoute:~# ping 192.168.2.13
PING 192.168.2.13 (192.168.2.13): 56 data bytes
64 bytes from 192.168.2.13: seq=0 ttl=127 time=66.432 ms
64 bytes from 192.168.2.13: seq=1 ttl=127 time=60.685 ms

--- 192.168.2.13 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 60.685/63.558/66.432 ms


Here are the VPN Setups:
HamRoute

MarcRoute

HolzRoute


If it helps, I can also show the advanced networking settings.

I have rebooted all routers multiple times without any change.
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MaGo81
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Joined: 16 Feb 2009
Posts: 18
PostPosted: Wed Nov 11, 2009 1:01    Post subject: Reply with quote
the remote subnet on holzroute is wrong
192.168.4.0 is it's own subnet,
set 192.168.2.0 for hamroute (HolzRoute: pptp client -> Remote Subnet)
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Drizzt81
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Joined: 01 Jul 2006
Posts: 39
PostPosted: Wed Nov 11, 2009 12:21    Post subject: Reply with quote
Thanks MaGo81. It seems to be working a lot better now. Next up: dnsmasq
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