Troubleshooting Connection Problems - F-SECURE CLIENT SECURITY 9.00 Administrator's Manual

Troubleshooting connection problems

If there are connection problems, for example a host cannot access the Internet, and you suspect that Internet
Shield might cause these problems, you can use the steps given here as a check list.
1. Check that the computer is properly connected.
2. Check that the problem is not in the network cable.
3. Check that ethernet is up and working properly.
4. Check that the DHCP address is valid.
You can do this by giving the command ipconfig in the command prompt.
5. Next you should ping the default gateway.
If you do not know the address, you can find it out by issuing the command ipconfig -all in the
command prompt. Then ping the default gateway to see if it responds.
6. If normal Internet browsing does not work, you can try to ping a DNS server:
• Run nslookup to make sure that the DNS service is running.
• You can also try to ping a known web address to make sure that the computer at the other end is not
down.
7. Next you should check whether something in the centrally managed domain has been changed; is there
a new policy in use and does this policy contain some settings that might cause these problems?
• Check from firewall rules that outbound HTTP connections are allowed.
• Check from the local application control that the IP address the user tries to connect to has not
accidentally been added to the list of denied addresses.
8. If nothing else helps, unload F-Secure products or set the Internet Shield to allow all mode.
If even this does not help, it is likely that the problem is in routing or in some other component in the computer
the user is trying to connect to.
F-Secure Client Security | Advanced features: Internet Shield | 153