# Securing L2TP and IP Tunnels with IPSec

This chapter describes how to secure generic routing encapsulation (GRE), Distance Vector Multicast Routing Protocol (DVMRP), and Layer 2 Tunneling Protocol (L2TP) tunnels with IP Security (IPSec) on your E Series router. It contains the following sections:

- Overview
- Platform Considerations
- References
- L2TP/IPSec Tunnels
- GRE/IPSec and DVMRP/IPSec Tunnels
- Configuring IPSec Transport Profiles
- Monitoring DVMRP/IPSec, GRE/IPSec, and L2TP/IPSec Tunnels