Administrator's Guide

Appendix B. Troubleshooting
Troubleshooting the Telecommuting Module largely consists of checking the hardware (the
Telecommuting Module, the network connectors, ...) and checking the Telecommuting Mod-
ule log. The log is usually an excellent tool in finding out why the Telecommuting Module
does not do what you wanted it to do.
Below is some general advice to help you troubleshoot, almost regardless of which problem
you have.
• Check that the events you look for are really logged (on the Logging Configuration
page).
• Check that the configuration has been applied properly, either by applying it (on the
Save/Load Configuration page) or by checking the Permanent Configuration (on the
Show Configuration page).
• Check that you display the log you want to look for. The correct date and time (or no date
or time) should be filled in, the desired log entries should be checked on the righthand
side of the page, and the three boxes concerning which IP packets to show should be filled
in accordingly.
Network troubleshooting
No traffic shown in the log
• Check that the interface is turned on on the corresponding interface page.
• Check that the Telecommuting Module has a correct default gateway (on the Basic Con-
figuration page).
• Check that the client computer has a correct default gateway.
Traffic discarded as spoofed
When traffic is blocked and the reason given is Spoofed, there is a mismatch between the
network that the Telecommuting Module is configured for and the network that the client
is configured for. The Telecommuting Module regards an IP address as spoofed if it detects
traffic from that IP address on an interface where the IP address should not be.
An example of a situation where this occurs is when you move a computer from one
Telecommuting Module interface to another without changing its IP address and netmask.
Another example is if the Telecommuting Module has been configured to use a network with
a netmask of 255.255.255.128, but the network really is larger, like 255.255.254.0. The IP
addresses outside the smaller IP interval will be regarded as spoofed by the Telecommuting
Module.
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