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TransIP nameserver change (how to update your linux Ubuntu VM/VPS)

NOTE TO SELF: change DNS on TransIP VPS machines.



Today I got an email from TransIP.

Nameservers are changed. 

Please update your virtual machine.

Old info : 80.69.67.66, 80.69.67.67, 2a01:7c8:a::c53, 2a01:7c8:b::c53

New info is :

195.8.195.8
195.135.195.135
2a01:7c8:7000:195::8:195:8
2a01:7c8:7000:195::135:195:135

Ok, now I have to get into my machine and update this stuff.

I used my normal SSH login to get a prompt. 

(user oetelx can use sudo because this user is in admin group)

I checked if the new IP adresses actually are running a valid DNS server before assuming anything.

oetelx@www:~$ dig @195.135.195.135 www.oetelaar.com



; <<>> DiG 9.11.3-1ubuntu1.13-Ubuntu <<>> @195.135.195.135 www.oetelaar.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 3218
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 1



;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1280
;; QUESTION SECTION:
;www.oetelaar.com. IN A



;; ANSWER SECTION:
www.oetelaar.com. 86399 IN CNAME oetelaar.com.
oetelaar.com. 86400 IN A 136.144.179.13



;; AUTHORITY SECTION:
oetelaar.com. 86399 IN NS ns1.dsserver.nl.
oetelaar.com. 86399 IN NS ns2.dsserver.nl.



;; Query time: 771 msec
;; SERVER: 195.135.195.135#53(195.135.195.135)
;; WHEN: Fri Sep 04 12:23:37 CEST 2020
;; MSG SIZE rcvd: 122

OK, that response seems to be reasonable.

This is my setup, some Ubuntu 18.04 LTS servers, always running.

oetelx@www:~$ cat /etc/issue.net 

Ubuntu 18.04.5 LTS

oetelx@www:~$ uname -a

Linux www 4.15.0-115-generic #116-Ubuntu SMP Wed Aug 26 14:04:49 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

My network config is in /etc/network/interfaces

Edit the config as an admin user using vim

oetelx@www:~$ sudo vim /etc/network/interfaces

[sudo] password for oetelx:

<type type type>

<esc>:wq


This is my new config (comment out the old stuff)

oetelx@www:/etc/network$ cat interfaces 
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
source /etc/network/interfaces.d/*
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto ens3
iface ens3 inet static
    address 136.144.179.13
    network 136.144.179.0
    netmask 255.255.255.0
    broadcast 136.144.179.255
    gateway 136.144.179.1
    # dns-nameservers 80.69.67.66 80.69.66.67
    dns-nameserver 195.8.195.8 195.135.195.135
    dns-search l18l.nl
    # This is an autoconfigured IPv6 interface
    # iface ens3 inet6 auto
iface ens3 inet6 static
    address 2a01:7c8:aac6:a8::1
    netmask 48
    gateway 2a01:7c8:aac6::1
    # dns-nameservers 2a01:7c8:b::c53 2a01:7c8:a::c53

    dns-nameservers 2a01:7000:195::8:195:8 2a01:7c8:7000:195::135:195:135
    dns-search l18l.nl
# end

Hope this helps, it just how I did it.
Best regards, #oetelx

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