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DNS module: Difference between revisions
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The DNS module stores for each name the last IP that has been announced. Due to load balancing mechanisms in content delivery networks (or other setups) and virtual hosting, a name might be resolved to multiple IP addresses or a single IP address uses multiple names. The web frontend will always show the latest information seen on the network. | The DNS module stores for each name the last IP that has been announced. Due to load balancing mechanisms in content delivery networks (or other setups) and virtual hosting, a name might be resolved to multiple IP addresses or a single IP address uses multiple names. The web frontend will always show the latest information seen on the network. | ||
== Main view == | |||
[[File:Dns servers.png|600xp|DNS servers]] | |||
=== DNS server === | === DNS server === | ||
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The DNS server IP column lists the IP of the DNS server which responded to a query. Often, especially in smaller networks, there is only one server, but clients are free to use any other available DNS server. | The DNS server IP column lists the IP of the DNS server which responded to a query. Often, especially in smaller networks, there is only one server, but clients are free to use any other available DNS server. | ||
[[File:Dns resolved names.png|400px|DNS resolved names]] | |||
=== Server response times === | === Server response times === | ||
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A table lists the amount of requests and responses, as well as response times per DNS server. A graph shows the amount of requests and responses over time. | A table lists the amount of requests and responses, as well as response times per DNS server. A graph shows the amount of requests and responses over time. | ||
[[File:Dns server response time.png|400px|DNS server response time]] | |||
=== Server reply codes === | === Server reply codes === | ||
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* Other errors | * Other errors | ||
[[File:Dns server reply codes.png|400px|DNS server reply codes]] | |||
=== DNS record types === | === DNS record types === | ||
This tab shows the amount of DNS record types globally for all DNS server. Detailed graphs are available for the most commonly used record types A, AAAA, CNAME and MX | This tab shows the amount of DNS record types globally for all DNS server. Detailed graphs are available for the most commonly used record types A, AAAA, CNAME and MX | ||
[[File:Dns record types.png|400px|DNS record types]] | |||
== DNS server details == | == DNS server details == | ||
[[File:Dns server details.png|600px|DNS server details]] | |||
The server details page shows an overview for the selected DNS server and a detailed list of DNS lookup response times for each individual DNS connection. Also, the unanswered DNS requests are shown and the non-existing names. | The server details page shows an overview for the selected DNS server and a detailed list of DNS lookup response times for each individual DNS connection. Also, the unanswered DNS requests are shown and the non-existing names. | ||
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=== Lookup response times === | === Lookup response times === | ||
[[File:Dns server names.png|400px|DNS names and lookup times]] | |||
This tab shows the number of unique DNS names that have been answered by the current DNS server. The table shows the number of requests and responses per name as well as counters for each reply code. Clicking any number will filter the connection list below the able for the corresponding elements. By using the toggle buttons above the table it is possible to hide name elements which do not have a non-zero counter for the specific field. For example, this allows for easily see only those names that have been answered with a server failure reply code. | This tab shows the number of unique DNS names that have been answered by the current DNS server. The table shows the number of requests and responses per name as well as counters for each reply code. Clicking any number will filter the connection list below the able for the corresponding elements. By using the toggle buttons above the table it is possible to hide name elements which do not have a non-zero counter for the specific field. For example, this allows for easily see only those names that have been answered with a server failure reply code. | ||