Useful Tools
Below we have selected a few links and tools that we have found useful or have recommended to end-users.
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Display your own external IP Address: What's my IP?
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ADSL in the UK: How it works
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Network packet tracing and protocol analysis (freeware): WireShark
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Ping routing/response timing (freeware and shareware versions): PingPlotter
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Online subnet calculator: SubnetOnline.com
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Windows based IP subnet calculator (freeware): WildPackets
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DNS Lookup (online): Domain Dossier or IPTools
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TCP/UDP Port List
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Windows XP Networking: Command Line Tools