CNET CWR-854 Instruction Manual

VPN FAQ
1. What is VPN?
2. What are the features and benefits of using VPN?
3. What are the protocols used by VPN?
4. What is a Tunnel?
5. What are the components for setting up a VPN?
6. What VPN protocol is supported by CNet wireless routers?
7. What is IPSec?
8. What is PPTP?
9. What is L2TP?
10. How does VPN work?
11. What is NAT Traversal?
12. What is an RSA Key?
13. What is PSK?
14. What is IKE?
CWR-854(F) VPN
1. What is the VPN protocol supported by CWR-854?
2. How many VPN tunnels are supported on CWR-854?
3. What are the IPSec security parameters needed for VPN?
4. What type of encryption is supported on CWR-854?
5. What is the Authentication method used by CWR-854?
6. What are DH1, 2, and 5 key groups?
7. How to configure VPN on CWR-854?

1- What is VPN?
VPN stands for Virtual Private Network and it is the technology to create a secure private network
between two hosts using a public network like Internet.
2- What are the features and benefits of using VPN?
COST-VPN replaces expensive leased connections with dial-up or DSL/cable connections.
SECURITY - Through authentication and encryption, VPN provides remote secure links for users to
access the company or any private network.
3- What are the protocols used by VPN?
The three protocols used by VPN are PPTP (point to point tunneling protocol), L2TP (layer 2 tunneling
protocol) and IPSec (Internet protocol security).
4- What is a Tunnel?
VPN Tunnel is a virtual private passage through an insecure medium like Inetrnet.
5- What are the components for setting up a VPN?
VPN client, this could be a computer (any operating system) or a router depending on the needs.
VPN server, this is a connection point for VPN clients.
6- What VPN protocol is supported by CNet wireless routers?
CWR-854(F) supports PPTP, IPSec VPN
CWR-901 supports PPTP, L2TP and IPSec
7- What is IPSec?
IPSec is the most common technology in use for creating and operating VPNs. In IPSec tunneling all
packets are completely and securely encapsulated and each packet receives a new header with all
address and connection information hidden from public view.
8- What is PPTP?
PPTP stands for point-to-point tunneling protocol and allows PPP packets to be encapsulated within IP
Packets and over any IP network.
9- What is L2TP?
Layer 2 Tunneling protocol is an extension of PPTP used by ISPs to enable the operation of a private
virtual networks over the Internet.
10- How does VPN work?
Basically VPN is created by the client system’s VPN software establishing a connection through a
secure tunnel with a VPN server. The tunnel can be built using PPTP, L2TP or IPSec protocols.

11- What is NAT Traversal?
NAT-T is the feature that makes NAT devices IPSec aware or compliant, thereby allowing remote
access users to build IPSec tunnels through home gateways. 10- What is an RSA Key?
12- What is an RSA key?
RSA stands for Rivest, Shamir, Adelman and is an encryption algorithm using asymmetric keys. DES,
AES and the two authentication algorithms, MD5 and SHA-1 use symmetric shared secret keys.
13- What is PSK?
PSK is short for Pre-Shared-Key. This is the key that identifies (authenticates) a communicating
party during a Phase 1 Internet Key Exchange negotiation. It is shared because both parties know
the key.
14- What is IKE?
Internet Key Exchange negotiates the IPSec security associations (SAs). This process requires the
two IPSec systems to first authenticate themselves in phase 1 and in phase 2, negotiate the IPSec
security associations and generate the required key material for IPSec.
CWR-854(F) VPN
1- What is the VPN protocol supported by CWR-854?
PPTP and IPSec
2- How many VPN tunnels are supported on CWR-854?
10 VPN Tunnels
3- What are the IPSec security parameters needed for VPN?
First choose IPSec security protocol. CWR-854 supports ESP.
Then choose encryption algorithm.
Then choose authentication method.
Last choose DH algorithm group.
4- What type of encryption is supported on CWR-854?
3DES (Data Encryption Standard), AES128 (Advanced Encryption Standard-128bit)
5- What are the Authentication methods used by CWR-854?
MD5 (message digest 5) and SHA1 (secure hash algorithm 1)

6- What are DH1, 2, and 5 key groups?
Diffie-Hellman (DH) is a public-key cryptography protocol that allows two parties to establish a
Shared secret key used by encryption and hash algorithms.
7- How to configure VPN on CWR-854?
Connect to the router’s web configuration and then go to VPN settings page. Enable VPN and click on
Edit to configure the tunnel 1 settings.