DNS Setup

DNS stands for Domain Name System. It is a hierarchical naming system that translates domain names, which are user-friendly and human-readable, into IP addresses, which are numerical identifiers used by computers to communicate over a network.

The DNS system acts like a phone book for the internet, mapping domain names to their corresponding IP addresses. When you type a domain name in a web browser or send an email, the DNS system resolves that domain name to the associated IP address, allowing your device to establish a connection with the intended server or device.

Clone a core matchine

change Networkadapter to VMNET2

run it
nmtui
ip: 192.168.10.130/25
gt:192.168.10.129
dns:192.168.226.2 (your default gateway ip use ip r to look at which is your default gateway)

change hostname : dns.linuxmhi.local

ping dr.dk -c2 (if ok then)

dnf install bind -y

open mobx and login with new session

su
Passw0rd
cd /var/named/



cd /var/named
ls
Forward zone :
cp named.localhost linuxnmhi.local.db

Reverse zone
cp named.loopback 10.168.192.db



vim linuxnmhi.local.db

$TTL 1D
@ IN SOA dns mhi (
0 ; serial
1D ; refresh
1H ; retry
1W ; expire
3H ) ; minimum
NS dns
IN MX 10 mail
dns IN A 192.168.10.130
mail IN A 192.168.10.160
www IN A 192.168.10.150
webmail IN A 192.168.10.150
dhcp IN A 192.168.10.10
smb IN A 192.168.10.140
print IN A 192.168.10.140
dg IN A 192.168.10.1
dgz IN A 192.168.10.129
ftp IN A 192.168.10.150
sql IN A 192.168.10.170
@ IN A 192.168.10.150


Check Forward zone:
named-checkzone -d linuxmhi.local linuxmhi.local.db

vim 10.168.192.db

$TTL 1D
@ IN SOA dns.linuxmhi.local. mhi.linuxmhi.local. (
0 ; serial
1D ; refresh
1H ; retry
1W ; expire
3H ) ; minimum
IN NS dns.linuxmhi.local.
160 IN PTR mail.linuxmhi.local.
130 IN PTR dns.linuxmhi.local.
150 IN PTR www.linuxmhi.local.
150 IN PTR webmail.local.
10 IN PTR dhcp.linuxmhi.local.
1 IN PTR dg.linuxmhi.local.
129 IN PTR dgz.linuxmhi.local.
140 IN PTR smb.linuxmhi.local.
170 IN PTR sql.linuxmhi.local.

Check Reverse zone:
named-checkzone -d 10.168.192.in-addr.arpa 10.168.192.db

Change the group name:
--------------------------
[root@localhost named]# ls -l
[root@localhost named]# chown :named linuxmhi.local.db 10.168.192.db

Connect to master file:
---------------------------
cd /etc
vim named.conf

listen-on port 53 { 127.0.0.1; 192.168.10.130; };

allow-query { localhost; 192.168.10.0/24; };


dnssec-validation no;

forwarders {192.168.226.2; };
forward only;


logging {
channel default_debug {
file "data/named.run";
severity dynamic;
};
};

zone "." IN {
type hint;
file "named.ca";
};

zone "linuxmhi.local" IN {
type master;
file "linuxmhi.local.db";
allow-update {none;};
};

zone "10.168.192.in-addr.arpa" IN {
type master;
file "10.168.192.db";
allow-update {none;};
};

:x

systemctl start named
journalctl -xel

Now change netcort

nmtui

ip : 192.168.10.130/29
Gateway: 192.168.10.129
DNS: 127.0.0.1
Search domains: linuxmhi.local



nslookup www.linuxmhi.local
nslookup linuxmhi.local
nslookup www

nslookup 192.168.10.1

nslookupdr.dk

systemctl enable named