Travel Technology - Networked Home Office Printers, ethernet and VPNs?




JadedTraveler
May 13, 07, 8:13 am
I'm trying to figure out how to get a printer with an Ethernet connection to be accessible from a company laptop I have, when a VPN client is running on said laptop.

The printer is connected via Ethernet to a router, and it has (and I can change it) a static IP address. The laptop is also connected to the router, from which it gets an IP address. With no VPN client running on the laptop, I can print to the printer. However, when I run a VPN client to my corporate office, the printer is not accessible. The local IP address the printer has is not visible in the VPN 'tunnel' than extends from my laptop to where the VPN tunnel ends on a switch somewhere on my corporate network.

I'm looking for a workaround for this. I've read about two possibilities, but have not tried either one yet. 1) there are so called link local ip addresses that are not switched (commonly referred to as 169.254/16...Link-local addresses will not route off the local link), and maybe the VPN/secure packets in the router can get to these local IP address this without being routed to my corporate network. Not sure and haven't tried it yet. Second, someone suggested experiment with port forwarding and or NAT on the router. Not sure how that would work, either. Anyone with insights into making this work?


brentley
May 13, 07, 9:44 am
It is actually protocol dependant.
So if your company is using PPTP as the VPN transport you are going to be basically out of luck.

If you company uses IPSEC to secure the tunnel and they have allowed local lan access then it may work. you will have to find out what the local lan addresses that they allow are and move all of your gear to that subnet. This is often not allowed by your network security guy, who works in the office and doesn't care about your needs.

What kind of VPN client are we talking about here?

mikel51
May 13, 07, 11:13 am
Most of the routers you buy for home use the 192.168.0.xxx subnet. One problem with working at home while on vpn, is that plenty of devices on your work network will be on that subnet.

I have been successful by changing my home network to the 10.254.25.xxx subnet. I set my router to have the IP address of 10.254.254.1 , and then all the devices on my home network get 10.254.254.xxx ip addresses. This has worked for me to allow my to use my home printers as wireless network printers while using a VPN connection into work.


JadedTraveler
May 13, 07, 12:38 pm
What kind of VPN client are we talking about here?
It's a "VPN-1 Secure Client NGX R60" by Check Point Software Technologies. OT, I didn't realize it, but they also own the ZoneAlarm firewall suite of products.



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