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Hooman Bahreini
Asked: 2020-08-26 14:15:03 +0800 CST

How to resolve my DNS servers

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I have setup an AWS EC2 instance (Ubuntu Server).

This is the content of /etc/resolv.conf

nameserver 127.0.0.53
options edns0
search ap-southeast-2.compute.internal

now I connect my EC2 instance to a VPN, using OpenVPN. OpenVPN make the following changes to /etc/resolv.conf

#
# Generated by OpenVPN 3 Linux (NetCfg::DNS::ResolvConfFile)
# Last updated: 2020-08-25 21:39:32
#
search somenetwork.com ap-southeast-2.compute.internal

# OpenVPN defined name servers
nameserver 121.98.0.1
nameserver 20.92.1.1
nameserver 20.92.1.2
nameserver 20.92.1.3

# System defined name servers
nameserver 127.0.0.53

# Other system settings
options edns0

After connecting to the VPN, my internet stops working. How can I resolve this issue?

Update:

As suggested in the comment by Thomas Ward, I connected to the VPN (which adds the above named server lines to resolv.conf) and then I am not able to browse the internet... but I can still ping 8.8.8.8. If I comment out the lines from resolv.conf then I can start browsing the internet.

I also tried the suggestion in the answer by Ravindra Bagale and ran the command:

ls -la /etc/resolv.conf

this is the output:

-rw-r--r-- 1 openvpn openvpn 244 Oct 10 05:05 /etc/resolv.conf
networking vpn dns aws openvpn

1 Answers

  1. It happens if you have symbolic link .

    Check if your /etc/resolv.conf have symbolic link to /run/resolvconf/resolv.conf

    Use below command to check

    ls -la /etc/resolv.conf

    Sample output, if it has symbolic link:

    lrwxrwxrwx 1 root root 09 Oct 30 22:22 resolv.conf -> /run/resolvconf/resolv.conf

    Otherwise, delete or backup existing /etc/resolv.conf and then:

    sudo ln -s /run/resolvconf/resolv.conf /etc/resolv.conf
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