How To Install resolv_wrapper on CentOS 7

In this tutorial we learn how to install resolv_wrapper on CentOS 7. resolv_wrapper is A wrapper for dns name resolving or dns faking

Introduction

In this tutorial we learn how to install resolv_wrapper on CentOS 7.

What is resolv_wrapper

It is likely that if you have a server/client architecture, you need to do DNS queries or a third party library, like Kerberos needs to be able to do queries. In the case of Kerberos the client needs to look the address of the KDC up via a SRV record. resolv_wrapper is able to either redirect all DNS queries to your DNS server implementation, or fake DNS replies! To use it set the following environment variables LD_PRELOAD=libresolv_wrapper.so RESOLV_WRAPPER_CONF=./my_resolv.conf This package doesn’t have a devel package because this project is for development/testing.

We can use yum or dnf to install resolv_wrapper on CentOS 7. In this tutorial we discuss both methods but you only need to choose one of method to install resolv_wrapper.

Install resolv_wrapper on CentOS 7 Using yum

Update yum database with yum using the following command.

sudo yum makecache

After updating yum database, We can install resolv_wrapper using yum by running the following command:

sudo yum -y install resolv_wrapper

Install resolv_wrapper on CentOS 7 Using dnf

If you don’t have dnf installed you can install DNF on CentOS 7 first. Update yum database with dnf using the following command.

sudo dnf makecache

After updating yum database, We can install resolv_wrapper using dnf by running the following command:

sudo dnf -y install resolv_wrapper

How To Uninstall resolv_wrapper on CentOS 7

To uninstall only the resolv_wrapper package we can use the following command:

sudo dnf remove resolv_wrapper

References

Summary

In this tutorial we learn how to install resolv_wrapper on CentOS 7 using yum and dnf.