DNS Look Up window
(Main window - > "Look Up" button)
Copyright © 1999-2011 JH Software ApS
DNS Look Up window (Main window - > "Look Up" button) |
Simple DNS Plus v. 5.2 Copyright © 1999-2011 JH Software ApS |
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Use this tool to perform lookups against the local and/or other DNS servers.
See Look Up Types for details.
The DNS Look Up window consists of a Menu, a Toolbar, Domain name entry field, Result display area, an Options pane, and a Status Bar.
| • | File menu |
| • | Look Up Choose one of the sub-items to do a specific look up type. |
| • | Stop Query Cancel to current DNS look up. |
| • | Exit Closes the DNS Look Up window. |
| • | Edit menu |
| • | Copy selection Copy the current selection in the result display area to the Windows clipboard. |
| • | Copy full response Copy everything in the result display area to the Windows clipboard. |
| • | View menu |
| • | DNS/WHOIS Options Shows/hides the Options pane. |
| • | IDN Native Characters Enables/disables display of native characters for IDNs. |
| • | Toolbar Shows/hides the toolbar. |
| • | Status bar Shows/hides the status bar. |
| • | Help menu |
| • | Contents & Index Opens this help file |
| • | On-line support Opens the support web-page in your Internet browser. |
| • | Look Up button Choose one of the sub-items to do a specific look up type. |
| • | Stop button Cancel to current DNS look up. |
| • | Copy button Copy text from the result display area to the Windows clipboard. |
| • | Options button Shows/hides the Options pane. |
| • | Help button Opens this help file |
Enter the domain name or IP address to look up.
Shows the result of the look up.
The Options pane is only visible (to the right of the result area) when enabled in the View menu or the Options button on the Tool Bar.
| • | DNS Options |
| • | DNS Server Specify the host name or IP address of the DNS server to do the look up against. |
| • | Port number The DNS server port number to do the look up against (usually 53). |
| • | Use TCP connection (virtual circuit) Most DNS requests, except for zone transfers, are sent over UDP. However in some situations it can beneficial to test if a DNS server also responds via TCP (which it should). This is also know as VC or "virtual circuit" in the classic NSLOOKUP command line tool. |
| • | Request recursion (RD flag) When checked (default), the DNS server will be asked to resolve the query if it doesn't have the answer in cache. Not all DNS servers accepts requests for recursion (also an option in the Simple DNS Plus). |
| • | Include EDNS0 options When checked, the following EDNS0 (extended DNS) will be included in the DNS request. |
| • | UDP payload size (bytes) Specify the maximum response packet size for UDP requests. This can be useful for testing certain requests which return large response messages. For example, IPv6 records were recently added for the Internet .com and .net top level names, making the full referral message for these domains larger than the standard 512 DNS message size. |
| • | DNSSEC OK (DO flag) Ask the DNS server to return DNSSEC signed data if available. |
| • | Checking Disabled (CD flag) Ask the DNS server not to check DNSSEC signatures. |
| • | WHOIS Options |
| • | WHOIS server Specify the host name or IP address of the WHOIS server to do the look up against. If "Auto" is selected, the tool will automatically try to determine the server name / IP addresses. |
| • | Port number The WHOIS server port number to do the look up against (usually 43). |
Shows the current status of the look up process.