VPN with an RTP300

Posts: 54 · Posted: Fri Sep 16, 2005 4:17 pm Post subject: VPN with an RTP300

Friends,

I am wondering if anybody else out there with an RTP300 has made this work. I need to VPN to my office from home. At home, my network consists of a cable modem, which goes to the RTP300, which then goes to a DLink DI-624. I cannot seem to get a VPN session to start up.

I have enabled all VPN passthrough features on both routers, but still no luck. Anybody out there gotten VPN to work through the RTP300 yet? I know there were some early problems with the RTP's firmware, but it seems like they're being addressed. I am able to enable the DMZ host on the IP of the DI-624 now, which is nice (I couldn't do that before).

Any ideas out there?

Thanks,

Russ

Posts: 177 · Vonage Forum Master Joined: Jul 22, 2005 Posts: 177

What type (PPTP/IPSEC) of VPN client are you using ?
Is the PC initiating the VPN connection connected to the RTP300 or the Dlink?
If the PC is connected to the Dlink, do you have a double NAT situation?

Posts: 54 · Posted: Fri Sep 16, 2005 5:19 pm Post subject:

Thanks for your reply.

1. I am using the VPN client built in to Windows XP Pro.

2. The PC is currently connected to the Dlink. I will try connecting directly to the RTP when I get home.

3. Yes, I have a double NAT situation.

Other noteworthy comments I could add: I have a lot of services running on my LAN (dedicated servers, FTP, HTTP, lots of VNC ports, etc). This is the first and only network service I've had any trouble with, and I do tend to use my network for a lot more than a lot of typical users probably do. Everything works great, but I cannot VPN in to my office.

Thanks a lot,

Russ

Posts: 177 · Vonage Forum Master Joined: Jul 22, 2005 Posts: 177

I don't know why, but VPN connections usually cause me the most trouble, although PPTP is usually more forgiving than IPSEC. If it works when you're connected directly to the RTP300, you can at least figure double NAT is the culprit.

Posts: 54 · Posted: Fri Sep 16, 2005 6:12 pm Post subject: I figured it out...

Well, for some reason, disabling DMZ host in the RTP300 fixes the problem.

What's up with that???

I'll have to disable the DMZ host when I need to VPN to work, I guess...

Is there another way, do you suppose?

Thanks,

Russ

Posts: 3 · New Forum Member Joined: Sep 16, 2005 Posts: 3

I have almost the same setup: Comcast RCA Cable modem connected to to a D-Link DI-624 wireless router, further connected to the Linksys RTP300.

I was having VPN issues when connecting the computers that needed VPN access to the Linksys router. Often the VPN connection would drop after some time, forcing me to reboot the Linksys RTP300. Sometimes even reboot would not work with VPN - everything else, voice, browsing etc would work fine.

I think I may have found a viable solution as described in this vonage post by CH3MI5TR4NG3R about the image of his dual router configuration.
vonage-forum.com/ftopic7668.html" target="_blank">http://www.vonage-forum.com/ftopic7668.html
Basically (1) disabled DHCP & Firewall on the Linksys
(2) connected cable modem to WAN of Dlink
(3) Connected from one lan port of Dlink to a Lan (not WAN!) port of the linksys.
(4) Connected from another lan port of linksys to the WAN of the Linksys.

Wierd, but everything seems to be working OK (at least for now) VPN, Voip etc.

Posts: 177 · Vonage Forum Master Joined: Jul 22, 2005 Posts: 177

temproductions wrote:

Well, for some reason, disabling DMZ host in the RTP300 fixes the problem.

What's up with that???

I'll have to disable the DMZ host when I need to VPN to work, I guess...

Is there another way, do you suppose?

Weird, it seems to be the opposite of what I experienced with my RTP300 about 1.5 months and a couple of firmware versions ago:

If I disabled DMZ functionality, my phone worked fine, but PPTP vpn client didn't work.
If I enabled DMZ functionality, my PPTP vpn client worked, but people couldn't hear me when I called them.

Posts: 33 · Vonage Forum Junior Joined: Jun 19, 2005 Posts: 33

I just got upgraded from the RT31P2 to the RTP300 (1.00.50 code).

Ever since then, been having issues with our Nortel VPN client.

IPSec pass thru is turned on.

****!

Posts: 54 · Posted: Thu Sep 22, 2005 6:00 pm Post subject:

I just noticed the new 1.00.50 firmware is running on my RTP300, and now I cannot get outbound VPN connections to work at all, with or without DMZ host enabled.

ICK...

~R

Posts: 4 · New Forum Member Joined: Sep 28, 2005 Posts: 4

Has anyone had any luck and or news? I just installed my vonage adapter (Linksys RPT300 with 1.00.50 firmware) and I can no longer connect to my VPN at work.

VPN Client: WinXP SP2 Pro
VPN uses PPTP
VPN Passthrough Enabled for all 3 protocols.

I can connect fine if I setup Computer -> Cable Modem -> outside, so I know my WinXP VPN settings are OK. I can't do it when using the RPT300.

My current setup:

ISP: InsightBB @ 4Mbps down/384Kbps up
Linksys BEFCMU10 cable modem
Linksys RPT300 with 1.00.50 router
Computer -> Router -> Modem -> outside.

Icab