The problem with the VPN server on

[Kostian90]

Excuse me, I do not speak English. I write through the Google translator.
I have a problem with the VPN server AC56U Firmware:380.61. When connecting one customer, the second can not be okay. "Verifying user and password" - continue to be a mistake. 619.

 

[martinr]

Unfortunately, Google Translate is not good enough for your problem to be understood. Can you perhaps find some who understands English to act as the translator?

 

[Kostian90]

The problem is as follows: when one client is connected to VPN server, others are not able to connect, 619 error. Sometimes, another client can be connected and work normally, but as soon as both are disconnected, it is impossible to connect again for anyone. The only solution is to restart router.

 

[ColinTaylor]

PPTP or OpenVPN?

 

[Kostian90]

PPTP

OpenVPN - no problem

 

[ColinTaylor]

PPTP

Do the clients use different user names, or are they sharing one user name?

 

[Kostian90]

All different. But the same password. Name all different

 

[Kostian90]

IP Pool DHCP I have changed. not earn

 

[ColinTaylor]

IP Pool DHCP I have changed. not earn

There is an error. You cannot use 192.168.0.x because that is your LAN.

Use 192.168.10.2 ~ 192.168.10.31

 

[Kostian90]

Not working.
I changed

 

[ColinTaylor]

What do you see in the System Log?

Aug  8 22:21:56 pptpd[3784]: CTRL: Client aaa.bbb.ccc.ddd control connection started
Aug  8 22:21:56 pptpd[3784]: CTRL: Starting call (launching pppd, opening GRE)
Aug  8 22:21:56 pptp[3786]: Plugin pptp.so loaded.
Aug  8 22:21:56 pptp[3786]: PPTP plugin version 0.8.5 compiled for pppd-2.4.7, linux-2.6.22.19
Aug  8 22:21:56 pptp[3786]: pppd 2.4.7 started by admin, uid 0
Aug  8 22:21:56 pptp[3786]: Using interface ppp10
Aug  8 22:21:56 pptp[3786]: Connect: ppp10 <--> pptp (aaa.bbb.ccc.ddd)
Aug  8 22:21:56 pptp[3786]: MPPE 128-bit stateless compression enabled
Aug  8 22:21:56 pptp[3786]: Cannot determine ethernet address for proxy ARP
Aug  8 22:21:56 pptp[3786]: local  IP address 192.168.1.1
Aug  8 22:21:56 pptp[3786]: remote IP address 192.168.10.2

Aug  8 22:23:42 pptpd[3800]: CTRL: Client eee.fff.ggg.hhh control connection started
Aug  8 22:23:42 pptpd[3800]: CTRL: Starting call (launching pppd, opening GRE)
Aug  8 22:23:42 pptp[3801]: Plugin pptp.so loaded.
Aug  8 22:23:42 pptp[3801]: PPTP plugin version 0.8.5 compiled for pppd-2.4.7, linux-2.6.22.19
Aug  8 22:23:42 pptp[3801]: pppd 2.4.7 started by admin, uid 0
Aug  8 22:23:42 pptp[3801]: Couldn't allocate PPP unit 10 as it is already in use
Aug  8 22:23:42 pptp[3801]: Using interface ppp11
Aug  8 22:23:42 pptp[3801]: Connect: ppp11 <--> pptp (eee.fff.ggg.hhh)
Aug  8 22:23:45 pptp[3801]: MPPE 128-bit stateless compression enabled
Aug  8 22:23:45 pptp[3801]: Cannot determine ethernet address for proxy ARP
Aug  8 22:23:45 pptp[3801]: local  IP address 192.168.1.1
Aug  8 22:23:45 pptp[3801]: remote IP address 192.168.10.3

 

[Kostian90]

I found a bug.
Now everything is working.
Thank you! Tomorrow I'll try a few more people to connect

 

[ColinTaylor]

Can you tell us what the problem was?

 

[Kostian90]

Doesn't work from computers 6,7.
works with the computer 4,5

 

[Kostian90]

It is sometimes connected, sometimes not. Very strange.
I will try still tomorrow. I will describe result

 

[ColinTaylor]

Doesn't work from computers 6,7.

Does the Zyxel support "PTPP passthrough"?

https://www.think-like-a-computer.com/2011/07/28/pptp-passthrough/

 

[Kostian90]

only it

 

[ColinTaylor]

I do not think it is possible to make this work for the computers behind the Zyxel.

The problem is that the Zyxel does not know how to route the GRE packets.

Edit: Do computers 6 and 7 have to be on a separate subnet? If not, then replace the Zyxel router with a switch or access point.