How To Fix NET004 - Name resolution of host names, IP addresses, services, and so on

NET004 - Overview

• Message type: E = Error

• Message class: NET - Network Messages

• Message number: 004

• Message text: Name resolution of host names, IP addresses, services, and so on

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message NET004 - Name resolution of host names, IP addresses, services, and so on ?

  The SAP error message NET004 typically indicates a problem with name resolution in the SAP system. This error can occur when the SAP system is unable to resolve hostnames, IP addresses, or services, which can prevent the system from connecting to other services or systems.
  Causes of NET004 Error
  
  DNS Issues: The Domain Name System (DNS) may not be configured correctly, or the DNS server may be unreachable.
  Hosts File Misconfiguration: The /etc/hosts file (on Unix/Linux) or C:\Windows\System32\drivers\etc\hosts file (on Windows) may not contain the correct entries for the hostname or IP address.
  Network Connectivity Problems: There may be network issues preventing the SAP system from reaching the DNS server or the target host.
  Firewall Restrictions: Firewalls may be blocking the necessary ports or protocols required for name resolution.
  SAP Profile Configuration: The SAP instance profile may not be configured correctly, leading to issues in resolving hostnames.
  Incorrect SAP Router Configuration: If using an SAP router, it