Information Security Stack Exchange is a question and answer site for information security professionals. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

As the title says, my firewall (Sonicwall) can do either IPSEC or L2TP/IPSEC for VPN connections. One advantage of L2TP/IPSEC I can see is that the client computer get allocated its own IP address on the LAN.

Are there any other advantages?

share|improve this question
up vote 9 down vote accepted

L2TP/IPSEC wraps a simulated data link layer in IPSEC. Plain IPSEC just encrypts the network layer. If you want hosts to think they're on the same LAN, use L2TP/IPSEC; if you'd rather skip the extra bandwidth and processing overhead, use IPSEC.

share|improve this answer
What about tunnel and/or transport mode with IPsec. And hey ESP also. I really don't understand why L2TP is required? – Ajay Dec 19 '15 at 14:58

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.