VPN Flashcards
What is tunneling?
Encrypting a link between two programs
What are the three types of VPN?
Host-to-host, client-based/remote access, network-based/site-to-site
What is a host-to-host vpn?
Like SSH. Very very easy to set up
What is a client-based VPN?
supports remote accessing an intranet. The cost is based on simultaneous connections. Can scan the users device for virus stuff or check what domain its part of for added security.
What is a site-to-site (network based) VPN?
Supports connections between multiple intranets (which can form an extranet)
What protocol is used for VPNs with the presentation/session layer?
SSL or TLS
What protocol is used for VPNs with the network layer?
IPsec
What is L2TP?
Layer 2 tunneling protocol
What is PPTP?
Point-to-point tunneling protocol
What is an SSL VPN?
It connects users to services and apps inside the private network using a SSL gateway. It can run on any port, more granular filtering than IPsec.
What do IPsec tunnels do?
They work on the network layer. Carries traffic for the entire network of devices. Protects IP packets with encryption and authentication.
What are policy based VPNs?
They use a crypto access list (CAL) to determine who is allowed to talk to who.
What are route based IPsec tunnels?
Allow any network traffic to flow through them. Basically a virtual link.
What are the two modes of IPsec?
Transport mode and tunneling mode.
What does transport mode do with IPsec?
Encrypts the message in the data packet
