DNS_CACHE module
Admin Guide
Section titled “Admin Guide”Overview
Section titled “Overview”This module is an implementation of a cache system designed for DNS records. For successful DNS queries of all types, the module will store in a cache/db backend the mappings, for TTL number of seconds received in the DNS answer. Failed DNS queries will also be stored in the back-end, with a TTL that can be specified by the user. The module uses the Key-Value interface exported from the core.
Dependencies
Section titled “Dependencies”OpenSIPS Modules
Section titled “OpenSIPS Modules”A cachedb_* type module must be loaded before loading the dns_cache module.
Exported Parameters
Section titled “Exported Parameters”cachedb_url (string)
Section titled “cachedb_url (string)”The url of the key-value back-end that will be used for storing the DNS records.
...#use internal cachedb_local modulemodparam("dns_cache", "cachedb_url","local://")#use cachedb_memcached module with memcached server at 192.168.2.130modparam("dns_cache", "cachedb_url","memcached://192.168.2.130:8888/")...blacklist_timeout (int)
Section titled “blacklist_timeout (int)”The number of seconds that a failed DNS query will be kept in cache. Default is 3600.
...modparam("dns_cache", "blacklist_timeout",7200) # 2 hours...Exported Functions
Section titled “Exported Functions”The module does not export functions to be used in configuration script.
doc copyrights:
Contributors
Section titled “Contributors”By Commit Statistics
Section titled “By Commit Statistics”Top contributors by DevScore(1), authored commits(2) and lines added/removed(3)
| # | Name | DevScore | Commits | Lines++ | Lines— |
|---|---|---|---|---|---|
| 1. | Liviu Chircu (@liviuchircu) | 15 | 10 | 123 | 121 |
| 2. | Vlad Paiu (@vladpaiu) | 15 | 5 | 1008 | 5 |
| 3. | Razvan Crainea (@razvancrainea) | 12 | 10 | 13 | 15 |
| 4. | Bogdan-Andrei Iancu (@bogdan-iancu) | 8 | 6 | 15 | 7 |
| 5. | Stefan Darius (@dariusstefan) | 6 | 4 | 90 | 12 |
| 6. | Vlad Patrascu (@rvlad-patrascu) | 2 | 1 | 1 | 0 |
(1) DevScore = author_commits + author_lines_added / (project_lines_added / project_commits) + author_lines_deleted / (project_lines_deleted / project_commits)
(2) including any documentation-related commits, excluding merge commits
(3) ignoring whitespace edits, renamed files and auto-generated files
By Commit Activity
Section titled “By Commit Activity”| # | Name | Commit Activity |
|---|---|---|
| 1. | Stefan Darius (@dariusstefan) | Jun 2026 - Jul 2026 |
| 2. | Razvan Crainea (@razvancrainea) | Feb 2012 - Jun 2026 |
| 3. | Bogdan-Andrei Iancu (@bogdan-iancu) | Jun 2012 - Jun 2020 |
| 4. | Liviu Chircu (@liviuchircu) | Mar 2014 - Jun 2018 |
| 5. | Vlad Patrascu (@rvlad-patrascu) | May 2017 - May 2017 |
| 6. | Vlad Paiu (@vladpaiu) | Feb 2012 - Oct 2012 |
(1) including any documentation-related commits, excluding merge commits
Documentation
Section titled “Documentation”Contributors
Section titled “Contributors”Last edited by: Razvan Crainea (@razvancrainea), Bogdan-Andrei Iancu (@bogdan-iancu), Liviu Chircu (@liviuchircu), Vlad Paiu (@vladpaiu).
License
Section titled “License”All documentation files (i.e. .md extension) are licensed under the Creative Common License 4.0