My customer has an offsite network connected to their onsite network through a VPN. Both ends use private IPs.
Now I want to implement a proxy/ISA server on the offsite network. Is it possible to implement with a single NIC or is using two NICs on a proxy/ISA server a must? If two NICs are to be used, then the NIC connecting to the router will be assigned with a public address and the NIC connecting to the local LAN will be assigned with a private address, right?
The point of an ISA server is to protect the network behind it, so you will want two NICs. It's not clear from your question what your current configuration looks like, but if the address on the LAN side of the router is public, then you will want a public address on the ISA server port that connects to the router and a private address on the LAN side.
Dig deeper on Virtual Private Network (VPN)
Related Q&A from Retired Expert - Jon Snader
Learn how to set an IP address on the network interface of a FTP/Web/mail server when a client has only one public IP address.continue reading
To connect to a WAN remotely, your client can use a VPN client or a leased line. Learn the pros and cons of WAN connectivity with each option, such ...continue reading
When using ISA 2000, some users can lose connection to the network and experience packet loss even if the VPN client is still connected. Learn how ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.