Selected Documents of Firewall
FAQ
Q1: Why does Windows fail to access the firewall through L2TP over IPSec?
A: When the Windows operating system accesses the firewall through L2TP over IPSec, the tunnel password authentication is not supported. Check whether the tunnel password authentication function is configured on the firewall. If yes, disable the tunnel password authentication function.
-MORE-
 
Q2: Why does Android 6.0 fail to establish an L2TP over IPSec tunnel with the firewall?
A: When a mobile working user establishes an L2TP over IPSec tunnel with the LNS from an Android 6.0 device, SHA1 is recommended. However, the Android 6.0 system uses the SHA2-256 algorithm based on the RFC draft, which is different from the RFC standard. Therefore, when SHA2-256 is used to establish an IPSec tunnel, the devices at both ends of the tunnel cannot communicate.
-MORE-
 
Q3: Why does the firewall fail to establish an IPSec tunnel with the ASA device of Cisco?
A: Both the firewall and ASA are security devices. When establishing an IPSec tunnel, you need to create a security policy on both devices to permit IPSec traffic. If a NAT device is deployed between tunnels, the NAT traversal function must be enabled on both ends of the tunnel.
-MORE-
 
Q4: Why does the firewall fail to establish an IPSec tunnel with the AR router?
A: The default values of the IPSec proposals on the firewall and those on the AR router are different. You need to compare the parameter settings at both ends to ensure that they match.
-MORE-
 
Q5: How can I establish an IPSec tunnel between the firewall and the FortiGate device of Fortinet?
A: IPSec tunnel configurations include ACL, IKE proposal, IPSec proposal, and IPSec policy configurations.
-MORE-
 
Q6: Can VPN tunnels be established between a firewall and different types of clients?
A: The support for IPSec tunnel varies with the device connected to the gateway. For example, an L2TP over IPSec tunnel can be established between a PC and a smartphone. However, an L2TP over IPSec tunnel cannot be established between an AP and a firewall.
-MORE-
Tech Topics
Interoperability Configuration Guide for VPN
Interoperability Configuration Guide for VPN
IPSec Troubleshooting Guide
IPSec Troubleshooting Guide
License Usage Guide
License Usage Guide
Recovering the Console Port Login Password
Learn Firewalls with Dr. WoW
NetTech TV
USG6000 Series Hardware Guide
USG6000 Series Hardware Guide
Online Tools
● Product Image Gallery
● Hardware Query Tool
● License Query Tool