What is the difference between dns_available setting values test and yes in the RBL configuration file?
This applies to F-Secure Internet Gatekeeper 6.42 with F-Secure Spam Control. The RBL (Real-Time Blackhole List) configuration file (fssc.cfg and fssc_example.cfg) contains setting called “dns_available”. By default this is set to “test”. The documentation in the file claims that it should be set to “yes”. That is a mistake in the documentation and the setting normally should be left to be “test.” When the setting is set to “test”, the product first verifies that the network connections before starting to do the actual RBL checks. The product makes a few test queries and, if successful, it proceeds with the actual RBL checks. These tests are performed when the product is started and then subsequently after every 5000 e-mails. If the setting is changed to “yes”, these tests are not done. This is useful mainly in network related troubleshooting situations – typically the setting should be left to “test”.
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