130 lines
4.2 KiB
Markdown
130 lines
4.2 KiB
Markdown
**Debian Specific Static IP Address Setup**
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Get the interface name by looking at
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```
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ip a
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```
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Example - here the interface we are targeting is enp1s0
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```
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~$ ip a
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1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
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link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
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inet 127.0.0.1/8 scope host lo
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valid_lft forever preferred_lft forever
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inet6 ::1/128 scope host noprefixroute
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valid_lft forever preferred_lft forever
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2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
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link/ether 52:54:00:0c:f6:e7 brd ff:ff:ff:ff:ff:ff
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altname enx5254000cf6e7
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inet 192.168.50.80/24 brd 192.168.50.255 scope global dynamic noprefixroute enp1s0
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valid_lft 85984sec preferred_lft 75184sec
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inet6 2404:4400:4181:9200:5054:ff:fe0c:f6e7/64 scope global dynamic mngtmpaddr proto kernel_ra
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valid_lft 86366sec preferred_lft 86366sec
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inet6 2404:4400:4181:9200:617f:906e:3877:3f00/64 scope global dynamic mngtmpaddr noprefixroute
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valid_lft 86366sec preferred_lft 86366sec
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inet6 fe80::b2a2:4462:bece:c8b7/64 scope link
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valid_lft forever preferred_lft forever
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~$
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```
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We will be updated the interfaces file int he networking dir.
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Before we do anything we always make a backup copy
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```
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sudo cp /etc/network/interfaces /etc/network/interfaces.bak
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```
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looking at the interface file its shows that the interface is set to dynamic
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** Orginal interface file
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```
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# This file describes the network interfaces available on your system
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# and how to activate them. For more information, see interfaces(5).
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source /etc/network/interfaces.d/*
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# The loopback network interface
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auto lo
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iface lo inet loopback
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# The primary network interface
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allow-hotplug enp1s0
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iface enp1s0 inet dhcp
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# This is an autoconfigured IPv6 interface
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iface enp1s0 inet6 auto
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```
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We will update the ***face enp1s0 inet dhcp***
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section to look like this
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Example of updated file
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```
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# This file describes the network interfaces available on your system
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# and how to activate them. For more information, see interfaces(5).
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source /etc/network/interfaces.d/*
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# The loopback network interface
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auto lo
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iface lo inet loopback
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# The primary network interface
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allow-hotplug enp1s0
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iface enp1s0 inet static
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address 192.168.50.20
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netmask 255.255.255.0
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gateway 192.168.50.254
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dns-nameservers 192.168.50.254 8.8.8.8
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# This is an autoconfigured IPv6 interface
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iface enp1s0 inet6 auto
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```
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After you have made this edit you can restart the service to get the new IP address
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```
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luddie@Node1-master:~$ ip a
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1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
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link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
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inet 127.0.0.1/8 scope host lo
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valid_lft forever preferred_lft forever
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inet6 ::1/128 scope host noprefixroute
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valid_lft forever preferred_lft forever
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2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
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link/ether 52:54:00:0c:f6:e7 brd ff:ff:ff:ff:ff:ff
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altname enx5254000cf6e7
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inet 192.168.50.20/24 brd 192.168.50.255 scope global enp1s0
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valid_lft forever preferred_lft forever
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inet 192.168.50.80/24 brd 192.168.50.255 scope global secondary dynamic noprefixroute enp1s0
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valid_lft 86372sec preferred_lft 75572sec
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inet6 2404:4400:4181:9200:617f:906e:3877:3f00/64 scope global dynamic mngtmpaddr noprefixroute
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valid_lft 86369sec preferred_lft 86369sec
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inet6 2404:4400:4181:9200:5054:ff:fe0c:f6e7/64 scope global dynamic mngtmpaddr proto kernel_ra
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valid_lft 86369sec preferred_lft 86369sec
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inet6 fe80::b2a2:4462:bece:c8b7/64 scope link
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valid_lft forever preferred_lft forever
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luddie@Node1-master:~$
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```
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The network is now available via the updated ip address... HOWEVER did you see the old IP is still there?
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```
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inet 192.168.50.80/24 brd 192.168.50.255 scope global secondary dynamic noprefixroute enp1s0
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valid_lft 86372sec preferred_lft 75572sec
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```
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Easiest way of dealing with this...
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```
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sudo reboot
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```
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And when the machine comes back up, ssh using the newly statically assigned IP address.
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Update - Dont forget to updated the /etc/resolve.conf with your nameserver address
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