I am at an office trying to setup a VPN such that when associates are not in the office, they can remote and work as if they are there. They use Quickbooks for invoices and all business related works.
I have setup Hamachi as the VPN and it seems to be working, all clients can connect and the VPN is functioning because I see all file shares that are necessary.
When I try to have one of their out of town associates remote in, he can connect to the VPN but when trying to access the Quickbooks company file I keep getting an error message saying:
"Cannot communicate with the company file." Then it goes onto say it could be a firewall issue.
I had the remote gentleman configure his home router to forward the required ports and even turn off his software firewalls. The error still occurs. The firewall at the office is a NetVanta 7100. I was thinking just for testing purposes to put the host machine on the DMZ and see if it works then.
Otherwise I am going to have the office get a seperate router and switch to do their computer networking on.
He has a T1 coming in for VOIP and a DSL coming in for the internet. Both are going into the NetVanta box. Would moving the internet to a seperate thing interrupt his VOIP??
Check name resolution... Quickbooks I believe tries to find the "server host" by name and not by IP. If you're in a DHCP environment then this is many times less than reliable to begin with. When you're remote via VPN a lot of the clients won't use the same DNS servers and won't see any netbios traffic since they end up on a different segment. I'd try static IP addresses (esp for the "server") and maybe putting them in a host file. That's def helped me in the past with dealing with Quickbooks.
Actually I tried another method before this one to solve my problem. I found on another forum here: http://community.intuit.com/posts/hamachi-vpn
that some success had been achieved by changing the binding order of network adapters. That is what worked for me. (Although, it seems to me that your method of modifying the hosts file might achieve the same ends).
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I wish to do same here in my company, i can access qucikbooks data file from remotely and work in multi-users environ, but how can i print from Quickbooks to my Local LAN.