How to check for network access between two servers?

To check network access between two servers, you can use several tools:

• ping — checks server availability via ICMP. For example:

  ping <IP address or hostname>
  

  If responses are received, basic network access is available.

• telnet or nc (netcat) — check the availability of a specific port:

  telnet <IP> <port>
  # or
  nc -zv <IP> <port>
  

  This is important if services communicate over specific ports.

• traceroute — shows the packet route and helps identify network issues:

  traceroute <IP>
  

• curl or wget — for checking HTTP(S) access:

  curl -I http://<IP or hostname>
  

If you need to automate the check, you can write a script that executes these commands and analyzes the results. Keep in mind that ICMP may be blocked, so ping is not always reliable.