Convert Host to IP and IP to Host. Changing a hostname to an IP address and vice versa is a common task when setting up or troubleshooting network connections. Whether you’re working on a web server, SSH, or VPN configuration, you may need to resolve a host bug (invalid hostname) by converting it to its corresponding IP address, or convert an IP address to its hostname for easier management.

Here’s how you can change a host to an IP and an IP to a host using various methods.

Method 1: Using the Command Line (Windows, Linux, macOS)

To Convert Hostname to IP Address:

1. Open Command Prompt (Windows) or Terminal (Linux/macOS).
2. Use the following command:
   php

   nslookup <hostname>


   For example:

   nslookup example.com


   This will return the IP address of the hostname.

To Convert IP Address to Hostname:

1. Open Command Prompt or Terminal.
2. Use the following command:
   php

   nslookup <IP_address>


   For example:

   nslookup 192.168.1.1


   This will return the hostname associated with the IP address.

Method 2: Using Online Tools

You can also use online services to resolve hostnames and IP addresses:

• To resolve a hostname to an IP address, use sites like whatismyip.com or DNSstuff.
• To resolve an IP address to a hostname, use tools like IPinfo or MXToolbox.

Method 3: Using Programming Languages

Python (Converting Hostname to IP and IP to Hostname):

You can write a simple script to achieve this using Python’s socket library.import socket

# Convert hostname to IP
hostname = “example.com”
ip_address = socket.gethostbyname(hostname)
print(f”IP Address of {hostname}: {ip_address}”)

# Convert IP to hostname
ip = “192.168.1.1”
hostname_from_ip = socket.gethostbyaddr(ip)
print(f”Hostname of {ip}: {hostname_from_ip[0]}”)

When setting up SSH or VPN connections, you may encounter errors caused by incorrect hostnames. Changing the hostname to its corresponding IP address may help resolve connection issues.

For example, in your SSH client (like PuTTY), simply replace the hostname with the IP address.
also read: Convert Host to IP and IP to Host

Conclusion

Converting a hostname to an IP address or vice versa can be done easily using the command line, online tools, or simple programming. This is a useful process when dealing with network configurations, troubleshooting, or resolving connectivity issues.