sudo zypper install openssh
sudo zypper install dhcp-server
sudo zypper install bind

sudo systemctl start sshd
sudo systemctl enable sshd
sudo systemctl status sshd
 
sudo firewall-cmd --add-service=ssh --permanent
sudo firewall-cmd --reload
 
ssh username@hostname_or_ip_address

sudo YaST

sudo nano /etc/dhcp/dhcpd.conf
 
default-lease-time 600;         # 10 minutes
max-lease-time 7200;            # 2  hours
 
option domain-name "example.com";
option domain-name-servers 192.168.1.116;
option broadcast-address 192.168.2.255;
option routers 192.168.2.1;
option subnet-mask 255.255.255.0;
 
subnet 192.168.2.0 netmask 255.255.255.0
 {
  range 192.168.2.10 192.168.2.20;
  range 192.168.2.100 192.168.2.200;
 }
 
sudo nano /etc/sysconfig/dhcpd
 
DHCPD_INTERFACE="eth0"  # Replace with your actual interface name
 
sudo systemctl start dhcpd
sudo systemctl enable dhcpd
sudo systemctl status dhcpd
 
sudo firewall-cmd --add-service=dhcp --permanent
sudo firewall-cmd --reload

sudo nano /etc/named.conf
 
options {
    directory "/var/lib/named";
    allow-query { any; };
    recursion no;  # Set to 'yes' if you want to allow recursive queries
};
 
zone "example.com" {
    type master;
    file "example.com.zone";
};
 
sudo nano /var/lib/named/example.com.zone

$TTL 86400
@   IN  SOA ns.example.com. admin.example.com. (
        2025092601 ; Serial
        3600       ; Refresh
        1800       ; Retry
        604800     ; Expire
        86400      ; Negative Cache TTL
)

; Name servers
@   IN  NS  ns.example.com.

; A records
ns  IN  A   192.168.1.10  ; Replace with your server's IP
@   IN  A   192.168.1.10  ; Replace with your server's IP
www IN  A   192.168.1.10  ; Replace with your server's IP

sudo chown named:named /var/lib/named/example.com.zone
sudo systemctl start named
sudo systemctl enable named
sudo systemctl status named
 
sudo firewall-cmd --add-service=dns --permanent
sudo firewall-cmd --reload
 
dig @192.168.1.10 example.com