Technical data

4. Packages

General DNS-options

DNS_BIND_INTERFACES If you choose ‘yes’ here, dnsmasq does not listen on all IP-

addresses and only binds and listens to IP-addresses deﬁned in DNS_LISTEN. With

option ‘no’ dnsmasq listens on all interfaces and IP-addresses, discarding request it nor-

mally should not react to. This is a problem if you like to use several DNS-servers on

diﬀerent IP-addresses. Additional DNS-servers on ﬂi4l can be necessary i.e. if you need

a slave-dns on ﬂi4l. If you don’t want to use dnsmasq exclusively on ﬂi4l you have to

choose ‘yes’ here and conﬁgure the IP-addresses for it via DNS_LISTEN.

DNS_LISTEN_N DNS_LISTEN_x If you chose OPT_DNS=’yes’, use DNS_LISTEN_N to set the

number and DNS_LISTEN_1 up to DNS_LISTEN_N to specify the local IPs where dnsmasq

accepts DNS-queries. If you set DNS_LISTEN_N to 0, dnsmasq answers DNS-queries on all

local IPs. Only IPs of existing interfaces (ethernet, wlan ...) are allowed. Alternatively

you can use ALIAS-Names here, i.e. IP_NET_1_IPADDR.

If in doubt, the default settings should be used.

DNS_VERBOSE Logging of DNS-queries: ‘yes’ or ‘no’

For detailed messages from the DNS DNS_VERBOSE has to be set to yes. DNS-queries are

logged to the syslog then. To see the messages you must set OPT_SYSLOGD=’yes’ (Page 73)

- see below.

DNS_MX_SERVER This variable indicates the hostname for the MX-record (Mail-Exchanger)

for the domain deﬁned in DOMAIN_NAME. A MTA (Mail"=Transport"=Agent, i.e. sendmail)

on an internal server asks the DNS for a Mail-Exchanger for the destination domain of

the mail beeing delivered.

This is no mail-client autoconﬁguration for i.e. Outlook! So please do not

insert gmx.de here and wonder why Outlook does not work.

DNS_FORBIDDEN_N DNS_FORBIDDEN_x Here you can provide domains, which are

always beeing answered as “not existend”.

Example:

DNS_FORBIDDEN_N='1'

DNS_FORBIDDEN_1='foo.bar'

In this case, a query for www.foo.bar is answered by an error. You can inhibit entire

Top-Level-Domains in this way:

DNS_FORBIDDEN_1='de'

Then the name resolution for all hosts of the .de Topleveldomain is switched oﬀ.

DNS_REDIRECT_N DNS_REDIRECT_x DNS_REDIRECT_x_IP Here you can specify

domains, which are beeing redirected to a speciﬁc IP.

Example: