How do you troubleshoot the DNS problem?

If it doesn’t fix your problem, move on to the solutions below, which are designed for Windows 10 users.

Table of Contents

Rule out ISP issues.
Restart your networking equipment.
Flush DNS cache and reset winsock.
Perform a clean reboot.
Run the Microsoft LLDP Protocol Driver.
Update network adapter driver and reinstall if needed.

How do I enable DNS lookup in ASA interface?

How to Enable DNS Lookups on Cisco ASA5500

Connect to the ASA, log in and go to enable mode, and then global configuration mode.
Now if you have corporate DNS server on your LAN you might prefer to use those, so you would use ‘inside’ as opposed to ‘outside’.

What are common DNS issues?

Improperly Configured DNS Records DNS problems usually stem from improper configuration of DNS records during most times. If you fail to put down the right values and IP addresses of your records, then there is a high likelihood that you will be bogged down by DNS resolution issues.

What is DNS connection problem?

DNS errors occur essentially because you’re unable to connect to an IP address, signaling that you may have lost network or internet access. DNS stands for Domain Name System.

How do I check if a DNS entry exists?

The most efficient way to check DNS records of the domain is to use a terminal with the command nslookup. This command will run on almost all operating systems (Windows, Linux, and macOS).

How do I know which DNS server is resolving?

The easiest and most efficient way to test and troubleshoot DNS is with the command-line utility, known as, Nslookup. With this tool, you can determine the name to IP address mappings, the mail server IP, the authoritative DNS server, and more.

What are the 2 types of DNS query resolution types?

In general, there are two ways of resolving a host or a domain name to an IP address, using the domain name system – a Recursive query and a non-Recursive query.

How DNS query works step by step?

How Does the DNS Process Work?

Step 1: Requesting Website Information.
Step 2: Contact the Recursive DNS Servers.
Step 3: Query the Authoritative DNS Servers.
Step 4: Access the DNS Record.
Step 5: Final DNS Step.
Authoritative DNS Server.
Recursive Nameserver.

How do DNS queries work?

In general, the DNS query process occurs in two parts:

A name query begins at a client computer and is passed to a resolver, the DNS Client service, for resolution.
When the query cannot be resolved locally, DNS servers can be queried as needed to resolve the name.

Does DNS use TCP or UDP?

DNS has always been designed to use both UDP and TCP port 53 from the start 1 , with UDP being the default, and fall back to using TCP when it is unable to communicate on UDP, typically when the packet size is too large to push through in a single UDP packet.