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Old 05-25-2004, 06:35 AM   #1 (permalink)
Runt
 
Location: Denver
Cisco VPN & Linsksys router question

The router is a cable/dsl linksys befsr41 connected to comcast broadband.
When I vpn into work while behind the router I am unable to access the net. Removing the router, I am able to access the net via my companie's connection. I have tried a DMZ to no avail. It's not a big deal but I'm getting tired of switching eathernet connections before I vpn into work for the day.
Any thoughts?
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Old 05-25-2004, 02:43 PM   #2 (permalink)
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Location: Boston, MAss., USA
Having the vpn software version might help.

Check for something called IPSec Pass through (advanced area, on filters tab), turn that on, and you should be ok.

edit: check for that info on the linksys, that is!
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Old 05-26-2004, 06:03 AM   #3 (permalink)
Runt
 
Location: Denver
Ipsec is already enabled on my linksys.
The vpn software is: Cisco Systems VPN client version 3.6.3 (B)

Any other ideas? Does the vpn client move the internet port from 80 to something else?

thanks
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Old 05-26-2004, 06:39 AM   #4 (permalink)
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Location: Central Coast CA
Talk to your IT guys at work and have them lead you through it, they know their network (or better) and will know how to go about this with out compromising security.
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Old 05-26-2004, 06:53 AM   #5 (permalink)
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Location: Ein tov she'ein bo ra!
Quote:
Originally posted by Polyphobic
Ipsec is already enabled on my linksys.
The vpn software is: Cisco Systems VPN client version 3.6.3 (B)

Any other ideas? Does the vpn client move the internet port from 80 to something else?


Are you using a proxy server either at work or setup on your linksys router?

thanks
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Old 05-26-2004, 06:53 AM   #6 (permalink)
Runt
 
Location: Denver
That'd work. However, they are puzzled also. The solution was to remove my router from the equation. If I can't get it resloved here I will move onto other tech forums. Thought I'd give it a try here first.
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Old 05-26-2004, 06:55 AM   #7 (permalink)
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Location: Ein tov she'ein bo ra!
Quote:
Originally posted by Polyphobic
That'd work. However, they are puzzled also. The solution was to remove my router from the equation. If I can't get it resloved here I will move onto other tech forums. Thought I'd give it a try here first.
Are you using PAT/NAT on your linksys device? So, you have talked to your WAN guys at work and they can not help you? HAHAHAA. Wish I could get away with that.
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Old 05-26-2004, 07:39 AM   #8 (permalink)
Runt
 
Location: Denver
Yes, I'm using NAT. And yes, I have talked to our IS boy at work. My company has 90 people with 1 IS person in each of the 2 locations. I am the backup IS person at my location. However, I stick to very basic problems. I'm primarily an OCPDBA.
Do you think the NAT is the problem?
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Old 05-26-2004, 09:19 AM   #9 (permalink)
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Location: Ein tov she'ein bo ra!
Well, you can work without the router. What is the router doing that is causing your problems? This is a basic layer 3 switch. You have an public routable address translated into a private address I assume. You can get connected to VPN but unable to route out to the internet? Have you tried to trace your path out to an internet address to determine where the problem lies?
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Old 05-26-2004, 09:37 AM   #10 (permalink)
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Location: Redondo Beach, CA
I'm using a Linksys rouer and Cisco VPN client 4.03 on XP. Works like a champ through the router - no config was necessary. I do have IPSEC passthru enabled.
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Old 05-26-2004, 11:36 AM   #11 (permalink)
Runt
 
Location: Denver
Damn it. I'm brain dead.
It occured to me that this may be a DNS issue. Here's some results:

In vpn behind router: can't ping the companie's DNS server

In VPN without the router: can ping the companies DNS server

Here's my next question:
Could this be caused by my company using the same IP range as my router?
Ex: company DNS server is 192.168.1.3 and my router is 192.168.1.1
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Old 05-26-2004, 11:54 AM   #12 (permalink)
Runt
 
Location: Denver
Okay. I fixed it. My companie's headquarters use 192.168 private IPs. My location uses 10.245. I changed my router to 172.16 and switched from DHCP to a static IP using 172.16. For some strange reason linksys only uses 192.168 for private IPs. Thanks for the help.
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Old 05-26-2004, 04:41 PM   #13 (permalink)
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Location: Redondo Beach, CA
My private LAN uses 192.168 and the VPN uses 167. I haven't needed to change my DNS and I'm using a static IP of 192.168.1.100 and local DNS of 192.168.1.98 (via Windows 2000 Server).

Glad to hear it's working for you.
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