Difference between revisions of "DNS"
Jump to navigation
Jump to search
| Line 11: | Line 11: | ||
;host <hostname or IPaddress> | ;host <hostname or IPaddress> | ||
:Resolve hostname to IPadddres or IPaddress to hostname | :Resolve hostname to IPadddres or IPaddress to hostname | ||
| − | + | ;host <host or IP> <nameserver> | |
| − | + | :Resolve using the specified nameserver | |
| − | + | ;dig <hostname> @<nameserver> | |
| − | + | :Resolve hostname with extra info from the optinoal <nameserver> | |
;/etc/resolv.conf | ;/etc/resolv.conf | ||
Revision as of 15:38, 8 April 2022
Domain Name Service. Bind a name to IP-addresses.
Server side
Zone transfer between master and slave server is on TCP port 53.
Disable resolving IPv6 addresses by editing /etc/default/bind9 to have OPTIONS="-4 -u bind"
Client side
Clients query the nameserver on UDP port 53.
- host <hostname or IPaddress>
- Resolve hostname to IPadddres or IPaddress to hostname
- host <host or IP> <nameserver>
- Resolve using the specified nameserver
- dig <hostname> @<nameserver>
- Resolve hostname with extra info from the optinoal <nameserver>
- /etc/resolv.conf
nameserver <dns-server1 IP>
nameserver <dns-server2 IP>
options <interface>
search <default search domain>