On-prem and on-cloud

Category archive

Networking

Networking

Troubleshooting Internet connectivity–Tier 1 support

in Networking by

Troubleshooting Internet connectivity–Tier 1 support

Run workflow below:

  1. Reload this web page later.
  2. Check your Internet connection. Reboot any routers, modems, or other network devices you may be using.
  3. Check your DNS settings. Contact your network administrator if you’re not sure what this means.
  4. Try disabling network prediction by following these steps: Go to Wrench menu > Options > Under the Hood and deselect “Predict network actions to improve page load performance.” If this does not resolve the issue, we recommend selecting this option again for improved performance.
  5. Try adding Google Chrome as a permitted program in your firewall or antivirus software’s settings. If it is already a permitted program, try deleting it from the list of permitted programs and adding it again.
  6. If you use a proxy server, check your proxy settings or check with your network administrator to make sure the proxy server is working.
  7. If you don’t believe you should be using a proxy server, try the following steps: Go to Wrench menu > Options > Under the Hood > Change proxy settings > LAN Settings and deselect “Use a proxy server for your LAN.”

CIDR/VLSM IPv4 subnet calculator

in Networking by

http://www.subnet-calculator.com/cidr.php

The CIDR Calculator enables CIDR network calculations using IP address, CIDR mask (subnet mask), mask bits, maximum required IP addresses and maximum required subnets.

Results of the CIDR calculation provide the wildcard mask, for use with ACL (Access Control Lists), CIDR network address (CIDR route), network address in CIDR notation and the CIDR address range for the resulting CIDR network.

For classful subnets, please use the IP Subnet Calculator. For classful supernets, please use the IP Supernet Calculator. For simple ACL (Access Control List) wildcard mask calculations, please use the ACL Wildcard Mask Calculator.

Build your IT Professional hands-on skills

in DaaS/Networking/Windows Server by

Become now an active member of the following communities to enhance your hands-on skills on various Microsoft and Citrix technologies:

Packet sniffing: the golden tools

in Networking by

Packet sniffing can prove a very useful method in providing administrators detailed information on the communication among various servers in a hosted environment. The following tools are indispensable when it comes to packet sniffing:

  1. Microsoft Network Monitor available at http://www.microsoft.com/en-us/download/details.aspx?id=4865 . Wireshark is also a great alternative. However Microsoft Network Monitor is usually preferred in some production environments due to its considerably smaller footprint.
  2. Microsoft Message Analyzer available at https://www.microsoft.com/en-us/download/details.aspx?id=44226.
  3. Microsoft PortQry UI version, available at http://www.microsoft.com/en-us/download/details.aspx?id=24009
  4. Netstat CLI command. Check netstat /? for details.
  5. Telnet for pinging listening TCP/UDP ports.

IP addressing and subnetting for dummies

in Networking by

The following resources provide a good starting point to understand and practice IP addressing and subnetting if you have no previous experience with TCP/IP networking:

  • http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a00800a67f5.shtml
  • http://www.watchguard.com/infocenter/editorial/135183.asp
  • http://www.petri.co.il/csc_convert_ip_address_from_decimal_to_binary.htm
Go to Top