Chapter 56 Troubleshooting
ZyWALL USG 300 User’s Guide
929
• If you set up a VPN tunnel across the Internet, make sure your ISP supports AH
or ESP (whichever you are using).
• If you have the ZyWALL and remote IPSec router use certificates to authenticate
each other, You must set up the certificates for the ZyWALL and remote IPSec
router first and make sure they trust each other’s certificates. If the ZyWALL’s
certificate is self-signed, import it into the remote IPsec router. If it is signed by
a CA, make sure the remote IPsec router trusts that CA. The ZyWALL uses one
of its
Trusted Certificates
to authenticate the remote IPSec router’s
certificate. The trusted certificate can be the remote IPSec router’s self-signed
certificate or that of a trusted CA that signed the remote IPSec router’s
certificate.
• Multiple SAs connecting through a secure gateway must have the same
negotiation mode.
I cannot set up an L2TP VPN tunnel.
• Make sure you have configured L2TP correctly on the remote user computers.
See
for examples.
• Make sure you configured an appropriate policy route on the ZyWALL.
• Make sure there is not a firewall between the ZyWALL and the remote users.
• If it is possible that the remote user’s public IP address could be in the same
subnet as the specified
My Address
, click
Configure > Network > Routing >
Policy Route > Show Advanced Settings
and select
Use Policy Route to
Override Direct Route
.
• Modifying the VPN connection or the VPN gateway that L2TP uses disconnects
any existing L2TP VPN sessions. Disconnect any existing L2TP VPN sessions
before modifying L2TP VPN settings. The remote users must make any needed
matching configuration changes and re-establish the sessions using the new
settings.
I cannot get my VPN concentrator configuration to work.
• Turn off policy enforcement in the member VPN connections.
• Make sure your firewall rules are not blocking the VPN packets.
• If the USG ZyWALLs’ VPN tunnels are members of a single zone, make sure it is
not set to block intra-zone traffic.
The VPN connection is up but VPN traffic cannot be transmitted through the VPN
tunnel.
Summary of Contents for USG-300 - V2.20 ED 2
Page 2: ......
Page 30: ...Table of Contents ZyWALL USG 300 User s Guide 30 ...
Page 31: ...31 PART I User s Guide ...
Page 32: ...32 ...
Page 38: ...Chapter 1 Introducing the ZyWALL ZyWALL USG 300 User s Guide 38 ...
Page 46: ...Chapter 2 Features and Applications ZyWALL USG 300 User s Guide 46 ...
Page 64: ...Chapter 3 Web Configurator ZyWALL USG 300 User s Guide 64 ...
Page 74: ...Chapter 4 Installation Setup Wizard ZyWALL USG 300 User s Guide 74 ...
Page 116: ...Chapter 6 Configuration Basics ZyWALL USG 300 User s Guide 116 ...
Page 184: ...Chapter 7 Tutorials ZyWALL USG 300 User s Guide 184 ...
Page 221: ...Chapter 8 L2TP VPN Example ZyWALL USG 300 User s Guide 221 ...
Page 222: ...Chapter 8 L2TP VPN Example ZyWALL USG 300 User s Guide 222 ...
Page 223: ...223 PART II Technical Reference ...
Page 224: ...224 ...
Page 238: ...Chapter 9 Dashboard ZyWALL USG 300 User s Guide 238 ...
Page 282: ...Chapter 10 Monitor ZyWALL USG 300 User s Guide 282 ...
Page 378: ...Chapter 14 Trunks ZyWALL USG 300 User s Guide 378 ...
Page 394: ...Chapter 15 Policy and Static Routes ZyWALL USG 300 User s Guide 394 ...
Page 408: ...Chapter 16 Routing Protocols ZyWALL USG 300 User s Guide 408 ...
Page 428: ...Chapter 19 NAT ZyWALL USG 300 User s Guide 428 ...
Page 433: ...Chapter 20 HTTP Redirect ZyWALL USG 300 User s Guide 433 ...
Page 434: ...Chapter 20 HTTP Redirect ZyWALL USG 300 User s Guide 434 ...
Page 456: ...Chapter 23 Authentication Policy ZyWALL USG 300 User s Guide 456 ...
Page 474: ...Chapter 24 Firewall ZyWALL USG 300 User s Guide 474 ...
Page 515: ...Chapter 25 IPSec VPN ZyWALL USG 300 User s Guide 515 ...
Page 516: ...Chapter 25 IPSec VPN ZyWALL USG 300 User s Guide 516 ...
Page 529: ...Chapter 26 SSL VPN ZyWALL USG 300 User s Guide 529 ...
Page 530: ...Chapter 26 SSL VPN ZyWALL USG 300 User s Guide 530 ...
Page 540: ...Chapter 27 SSL User Screens ZyWALL USG 300 User s Guide 540 ...
Page 542: ...Chapter 28 SSL User Application Screens ZyWALL USG 300 User s Guide 542 ...
Page 550: ...Chapter 29 SSL User File Sharing ZyWALL USG 300 User s Guide 550 ...
Page 635: ...Chapter 34 IDP ZyWALL USG 300 User s Guide 635 ...
Page 636: ...Chapter 34 IDP ZyWALL USG 300 User s Guide 636 ...
Page 646: ...Chapter 35 ADP ZyWALL USG 300 User s Guide 646 Figure 448 Profiles Protocol Anomaly ...
Page 657: ...Chapter 35 ADP ZyWALL USG 300 User s Guide 657 ...
Page 658: ...Chapter 35 ADP ZyWALL USG 300 User s Guide 658 ...
Page 690: ...Chapter 37 Content Filter Reports ZyWALL USG 300 User s Guide 690 ...
Page 708: ...Chapter 38 Anti Spam ZyWALL USG 300 User s Guide 708 ...
Page 730: ...Chapter 39 Device HA ZyWALL USG 300 User s Guide 730 ...
Page 746: ...Chapter 40 User Group ZyWALL USG 300 User s Guide 746 ...
Page 752: ...Chapter 41 Addresses ZyWALL USG 300 User s Guide 752 ...
Page 764: ...Chapter 43 Schedules ZyWALL USG 300 User s Guide 764 ...
Page 780: ...Chapter 45 Authentication Method ZyWALL USG 300 User s Guide 780 ...
Page 802: ...Chapter 46 Certificates ZyWALL USG 300 User s Guide 802 ...
Page 814: ...Chapter 48 SSL Application ZyWALL USG 300 User s Guide 814 ...
Page 824: ...Chapter 49 Endpoint Security ZyWALL USG 300 User s Guide 824 ...
Page 876: ...Chapter 50 System ZyWALL USG 300 User s Guide 876 ...
Page 916: ...Chapter 54 Reboot ZyWALL USG 300 User s Guide 916 ...
Page 918: ...Chapter 55 Shutdown ZyWALL USG 300 User s Guide 918 ...
Page 938: ...Chapter 56 Troubleshooting ZyWALL USG 300 User s Guide 938 ...
Page 946: ...Chapter 57 Product Specifications ZyWALL USG 300 User s Guide 946 ...
Page 1118: ...Appendix F Open Software Announcements ZyWALL USG 300 User s Guide 1118 ...