Discover how complex remotely troubleshooting user issues can be when it is specific TCP or UDP services. Observe how to utilize telnet to test TCP based applications. Understand how to use wireshark and TCPDump in conjunction with telnet or other UDP applications for end to end network continuity testing.
- Admins have to duplicate claims from users or customers.…But it's not always practical to drop everything,…grab a laptop, and head out to test.…In these instances, we admins need to test with some remote…tools that will help us simulate these services.…The vast majority of services I find myself testing…will be TCP based HTTP, SMTP, et cetera.…To test TCP, I need a TCP based utility.…My go to tool on Windows is Telnet.…
This can be done through the Windows telnet utility…or via apps like putty.…Telnet can be especially useful for troubleshooting…clear text protocols.…The majority of HTTP servers will respond…when an admin telnets to it via port 80.…For this example, I'll telnet to google.com.…Telnet,…port,…80.…Once connected, I type get space forward slash space HTTP…forward slash one period one and hit enter twice.…
You should get some sort of output that indicates you…entered a bad request which means…that our test was successful.…The fact that anything came back shows that we have…a TCP connection in both directions.…
Even if you're rusty on your OSI model knowledge, this course is invaluable if you're having trouble with your network. It offers a clear, practical troubleshooting guide to narrowing down and solving most problems related to network connectivity.
- Troubleshooting the physical layer: POTS, Ethernet, and more
- Troubleshooting the data link layer
- Troubleshooting the network layer
- Troubleshooting the transport layer
- Troubleshooting Wi-Fi
- Troubleshooting proactively