Connectivity Testing

5 pts.
Tags:
DMZ
Network connectivity
Network performance
Network testing
1) Connectivity between DMZ Server and Application Server 2) Application Serever to Database Server 3) Load Balancer to Application Server / Database Server Please suggest the sequence of Steps to check the connectivity between these layers (Telnet, FTP Tests etc.) which will be immensely helpful for Troubleshooting.
ASKED: May 28, 2008  12:30 PM
UPDATED: May 28, 2008  1:33 PM

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You can telnet to an application port to test connectivity. For example if your database is listening on port 1433, at a command prompt, type <b>telnet host.ip 1433</b> or change the host.ip with the hostname to test name resolution. You can do the same test if you are using FTP services or simply use an FTP client (e.g. <a href=”http://filezilla-project.org/”>filezilla</a>). If you permit ICMP in your network, simple ping testing will tell if the path is working between client and host. These are for testing layer 3/4 and below.

For testing above layer 3/4, you will need some application specific tools for your environment and access to the system logs. Turn on auditing during your testing to see if the events are being properly captured.

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