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IP Tunneling
Configuration Examples and TechNotes
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Generic Routing Encapsulation (GRE)
Point-to-Point Tunneling Protocol (PPTP)
Generic Routing Encapsulation (GRE)
Layer Two Tunnel Protocol (L2TP)
Point-to-Point Tunneling Protocol (PPTP)
Serial Tunnel (STUN)
X25 Over TCP (XOT)
Generic Routing Encapsulation (GRE)
Configuring GRE over IPSec Between a Cisco IOS Router and a VPN 5000 Concentrator Using Static Routing
04/Apr/2008
Configuring the Cisco VPN 5000 and a Router to Open a GRE Tunnel
02/May/2008
WCCP on ASA: Concepts, Limitations, and Configuration
31/May/2013
Point-to-Point Tunneling Protocol (PPTP)
Configuring CiscoSecure ACS for Windows Router PPTP Authentication
26/Mar/2007
Configuring the PIX Firewall and VPN Clients Using PPTP, MPPE and IPSec
13/Oct/2008
Configuring the VPN 3000 Concentrator PPTP With Cisco Secure ACS for Windows RADIUS Authentication
15/Jan/2008
How to Configure the VPN 3000 Concentrator PPTP with Local Authentication
06/Dec/2006
PIX 6.x: PPTP with Radius Authentication Configuration Example
18/Dec/2007
Generic Routing Encapsulation (GRE)
Configuring CET Encryption with a GRE Tunnel
Configuring Dynamic Multipoint VPN Using GRE Over IPSec With EIGRP, NAT, and CBAC
Configuring Dynamic Multipoint VPN Using GRE Over IPsec With OSPF, NAT, and Cisco IOS Firewall
Configuring GRE and IPSec with IPX Routing
Configuring GRE over IPSec Between a Cisco IOS Router and a VPN 5000 Concentrator Using Static Routing
Configuring IPSec with EIGRP and IPX Using GRE Tunneling
Configuring Router-to-Router IPsec (Pre-shared Keys) on GRE Tunnel with IOS Firewall and NAT
Configuring a GRE Tunnel over IPsec with OSPF
Configuring the Cisco VPN 5000 and a Router to Open a GRE Tunnel
IPSec/GRE with NAT on IOS Router Configuration Example
Multicast over a GRE Tunnel
Next Generation Multicast Default MDT: Profile 0
Layer Two Tunnel Protocol (L2TP)
Client-Initiated L2TPv2 Tunnel with ISR4000 That Acts as a Server Configuration Example
Configuring Cisco IOS and Windows 2000 Clients for L2TP Using Microsoft IAS
Configuring Layer 2 Tunnel Protocol Authentication with RADIUS
Configuring Layer 2 Tunneling Protocol (L2TP) over IPSec
Configuring a PC as a PPPoA Client Using L3 SSG/SSD
Configuring the PPPoE Client on a Cisco Secure PIX Firewall
How to Configure Layer 2 Tunnel Protocol Authentication with TACACS+
Set Up L2TP Tunnel Between a Windows Machine and a Cisco Router
Point-to-Point Tunneling Protocol (PPTP)
Configuring CiscoSecure ACS for Windows Router PPTP Authentication
Configuring PPTP Through PAT to a Microsoft PPTP Server
Configuring the Cisco Router and VPN Clients Using PPTP and MPPE
Configuring the PIX Firewall and VPN Clients Using PPTP, MPPE and IPSec
Configuring the VPN 3000 Concentrator PPTP With Cisco Secure ACS for Windows RADIUS Authentication
How to Configure the VPN 3000 Concentrator PPTP with Local Authentication
PIX 6.x: PPTP with Radius Authentication Configuration Example
Serial Tunnel (STUN)
Configuring BSTUN Point-to-Point
Configuring BSTUN Point-to-Point with Local Acknowledgement over Frame Relay
Configuring STUN with Mixed Encapsulation
Configuring STUN with Modem-Sharing Devices
Guide to BSC and BSTUN
(ZIP - 72 KB)
STUN Basic with Multiple Tunnels
STUN Direct Encapsulation Configuration Example
STUN Multipoint Configuration Example
Serial Tunneling (STUN) Complex Multipoint
Tunneling Async Protocols in BSTUN Configuration Example
X25 Over TCP (XOT)
Configuring a Router as a PAD for XOT to an Asynchronous Host
TCP over X.25
X25 Over TCP/IP With XOT Keepalives
X.25 over TCP/IP
Support Documentation
All Support Documentation for this protocol