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Add REFRESH_HOSTNAMES config item

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Signed-off-by: DL6ER <dl6er@dl6er.de>
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DL6ER
2020-12-02 06:33:08 +01:00
parent 03a7ac6d1c
commit 777c0c64e2
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docs/abbreviations.md
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@@ -10,6 +10,7 @@
*[TCP]: Transmission Control Protocol (protocol providing reliable, ordered, and error-checked delivery of data between applications running on hosts communicating via an IP network)
*[UDP]: User Datagram Protocol (a network communications method for sending messages as datagrams)
*[API]: Application Programming Interface (a set of subroutine definitions, protocols, and tools for building application software)
*[PE]: Privacy Extension
*[PID]: Process identifier (a number used to identify a process)
*[HOSTS]: The computer file /etc/hosts is an operating system file that maps hostnames to IP addresses
*[POSIX]: Portable Operating System Interface (a family of standards specified by the IEEE Computer Society for maintaining compatibility between operating systems)
docs/ftldns/configfile.md
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@@ -93,6 +93,17 @@ host name for another IP address (e.g., a DHCP server managed IPv4 address). In
this case, we use the host name associated to the other address as this is the
same device.
#### `REFRESH_HOSTNAMES=IPV4|ALL|NONE` (PR [#953](https://github.com/pi-hole/FTL/pull/953)) {#refresh_hostnames data-toc-label='Refresh hostnames'}
With this option, you can change how (and if) hourly PTR requests are made to check for changes in client and upstream server hostnames. The following options are available:
- `REFRESH_HOSTNAMES=IPV4` - Do the hourly PTR lookups only for IPv4 addresses
This is the new default since Pi-hole FTL v5.3.2. It should resolve issues with more and more very short-lived PE IPv6 addresses coming up in a lot of networks.
- `REFRESH_HOSTNAMES=ALL` - Do the hourly PTR lookups for all addresses
This is the same as what we're doing with FTL v5.3(.1). This can create a lot of PTR queries for those with many IPv6 addresses in their networks.
- `REFRESH_HOSTNAMES=NONE` - Don't do any hourly PTR lookups
This means we look host names up exactly once (when we first see a client) and never again. You may miss future changes of host names.
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### Long-term database settings