Next: 3.12 imond configuration Up: 3. Base configuration Previous: 3.10 The Packet Filter
Windows PCs exhibit a somewhat annoying behaviour: If a DNS server is needed and configured at the Windows system, the server is queried regularly (every five minutes) - even if you don't work at the PC!
If you configured an Internet DNS server at your Windows PC, your next bill might become quite expensive :-(
If you don't already run a DNS server in your LAN, this problem can be solved by enabling the DNS server of your fli4l router. The DNS server software used is DNSMASQ.
Before you start configuring your DNS, however, you should give careful consideration to the domain name and the names of the PCs in your network. The domain name you use will not be visible in the Internet. Therefore, you are free to choose any domain name you like.
Additionally, each of your PCs in the LAN has to have a name assigned. These names have to be known by the fli4l router.
Default Setting: DOMAIN_NAME='lan.fli4l'
You can freely choose any domain name as this local domain is not visible in the Internet. However, you should avoid choosing a name that may exist in the Internet (e.g. somewhat.com) because you won't be able to access that Internet domain.
Default Setting: DNS_FORWARDERS=''
This variable contains the address of your Internet provider's DNS server if you want your fli4l router to route Internet traffic. The fli4l router will forward all DNS queries which it is not able to answer on its own to the address in this variable.
You can specify more than one DNS forwarder by separating the addresses by blanks.
If more DNS server are specified, they will be queried in the order given by the configuration file, meaning the second will only be used in case that the first server does not return a valid answer and so on.
It is also possible to specify a port number for each DNS forwarder address which is then to be separated from the address by a colon. However, in this case it is required to set OPT_DNS='yes' (Package dns_dhcp), and you are not allowed to use any of the various *_USEPEERDNS options.
Beware: Even if
are set to `yes', you need to fill this variable with a valid DNS server address as otherwise no DNS resolution will be possible directly after the router has booted.
Exception: If you use fli4l as a local router without a connection to the Internet or other (company) networks with DNS servers, you should set this variable to `127.0.0.1' in order to disable DNS forwarding completely.
This variable can optionally specify to which network 'IP_NET_x' the hostname set by HOSTNAME is bound.
Number of additional alias host names for the router.
Additional alias host name for the router.