Kerio Tech Firewall6, Administrator'S Manual

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8.1 DNS Forwarder
103
of the firewall’s network interfaces, see chapter 5 , more information on Internet connection
options, refer to chapter 6 .
DNS Forwarder configuration
In WinRoute default settings, the DNS Forwarder is enabled and DNS queries are automatically
forwarded to one of the DNS servers set for the particular Internet link (usually DNS servers
assigned by the ISP). The configuration can be fine-tuned in Configurations
→
DNS Forwarder .
Figure 8.1 DNS forwarder settings
Enable DNS forwarding
This option switches between the on/off modes of the DNS Forwarder (the service uses
UDP protocol and port
53
). If DNS Forwarder is not used for your network configuration,
it can be switched off. If you want to run another DNS server on the same host, DNS
Forwarder must be switched off, or there will be a collision on the port.
Enable cache for faster response of repeated queries
If this option is on, all responses will be stored in local DNS Forwarder cache. Responses
to repeated queries will be much faster (the same query sent by various clients is also
considered as a repeated query).
Physically, the DNS cache is kept in RAM. However, all DNS records are also saved in the
DnsCache.cfg
file (see chapter 25.1 ). This means that records in DNS cache are kept
even after WinRoute Firewall Engine is stopped or WinRoute is disconnected.
Note: