TL-ER604W VPN connects but I am not able see any PC's on LAN

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TL-ER604W VPN connects but I am not able see any PC's on LAN

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
TL-ER604W VPN connects but I am not able see any PC's on LAN
TL-ER604W VPN connects but I am not able see any PC's on LAN
2014-05-23 07:51:33 - last edited 2021-08-21 04:33:58
Region : UnitedStates

Model : TL-ER604W

Hardware Version : V1

Firmware Version : 1.0.0 Build 20130116 Rel.52243s

ISP : Comcast


I am able to connect to my VPN using a L2TP client to lan setup but I am not able to connect to any fileshares, ping any pc's on the vpn's lan, only thing I can do is connect to the router and routers management page... makes it pointless. PLEASE HELP. I have tried setting up routes, ect, to no avail.

I have also tried turning off the firewalls on both sides (client and router) added the L2TP ports through services, I have tried everything possible.... it just doesn't work.... It is really frustrating that TP-Link has not jumped in to help people who bought this product expecting it to work.

I even set up the vpn using Shrew soft and it has the same issues. Its obviously something wrong with the router. I have also set up a pptp vpn and it doesn't work either.... My ip ranges are correct. there is no conflict in my ranges...
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#1
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How to fix your VPN connections.
2014-08-07 22:45:15 - last edited 2021-08-21 04:33:58
Hi guys,
I encountered the same problem, I believe it to be a bug in the router firmware and have reported it as such, however I'm happy to tell you that there is a workaround.

The basic issue is that the router does not send back the correct routing table entries to the client after connection in all cases.
You can verify this yourself in windows by checking the routing table.

I'll illustrate this with my own configuration.

my LAN network address is 172.16.106.0
when I initially set up client - network VPN, I followed the example in the guide, and created an address pool in the range 10.10.10.10. - 10.10.10.50 for VPN clients.
When I connected to the VPN, as you have all seen, it connected fine, but I was unable to contact any machine on my LAN.
What I discovered from the windows routing table, was that no route had been created for the 172.16.106 network.
Instead, a route to 10.0.0.0 had been created, which didn't make a great deal of sense.

However, I found that if I manually created a route to 172.16.106.0 then miraculously everything started to work.
To do this manually, check what your VPN client address is (in my case it was 10.10.10.10), and add the route in an administrator command prompt with (again using my network as an example)
route add 172.16.106.0 mask 255.255.255.0 10.10.10.10

There is also an automated way to achieve the same objective by changing the address pool so that the range is contained within the same superset as the LAN addresses.
In my example, I set the pool address range to be 172.16.108.1 - 172.16.108.50

Now when I connect to the VPN, the router creates for me a route for 172.16.0.0 which includes both the VPN client range, and the LAN subnet, so everything works as expected.

I hope that works for everyone.
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Re:TL-ER604W VPN connects but I am not able see any PC's on LAN
2014-12-16 05:17:06 - last edited 2021-08-21 04:33:58
Your workaround did not work for me--although very helpful. I still cannot get to my internal servers...any other ideas?

pgb195 wrote

Hi guys,
I encountered the same problem, I believe it to be a bug in the router firmware and have reported it as such, however I'm happy to tell you that there is a workaround.

The basic issue is that the router does not send back the correct routing table entries to the client after connection in all cases.
You can verify this yourself in windows by checking the routing table.

I'll illustrate this with my own configuration.

my LAN network address is 172.16.106.0
when I initially set up client - network VPN, I followed the example in the guide, and created an address pool in the range 10.10.10.10. - 10.10.10.50 for VPN clients.
When I connected to the VPN, as you have all seen, it connected fine, but I was unable to contact any machine on my LAN.
What I discovered from the windows routing table, was that no route had been created for the 172.16.106 network.
Instead, a route to 10.0.0.0 had been created, which didn't make a great deal of sense.

However, I found that if I manually created a route to 172.16.106.0 then miraculously everything started to work.
To do this manually, check what your VPN client address is (in my case it was 10.10.10.10), and add the route in an administrator command prompt with (again using my network as an example)
route add 172.16.106.0 mask 255.255.255.0 10.10.10.10

There is also an automated way to achieve the same objective by changing the address pool so that the range is contained within the same superset as the LAN addresses.
In my example, I set the pool address range to be 172.16.108.1 - 172.16.108.50

Now when I connect to the VPN, the router creates for me a route for 172.16.0.0 which includes both the VPN client range, and the LAN subnet, so everything works as expected.

I hope that works for everyone.
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#3
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Re:TL-ER604W VPN connects but I am not able see any PC's on LAN
2014-12-17 04:52:19 - last edited 2021-08-21 04:33:58

Mizel wrote

Region : UnitedStates

Model : TL-ER604W

Hardware Version : V1

"Firmware Version : 1.0.0 Build 20130116 Rel.52243s"

ISP : Comcast


The Firmware Version you are using is official first release that ships with the router.
Those issues were resolved in the latest firmware release. Official Firmware TL-ER604W_V1_141031
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#4
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