--- name: "inadyn.conf" section: "5" platform: "linux" package: "inadyn" version: "2.11.0-1+b1" release: "Debian 13 (Trixie)" platforms: ["linux"] url: "https://new.carta.tech/inadyn.conf" --- # inadyn.conf(5) inadyn DDNS client configuration file ## NAME **inadyn.conf** – inadyn DDNS client configuration file ## SYNOPSIS **/etc/inadyn.conf** ## DESCRIPTION **inadyn** is configured using a simple configuration file. The “#” character marks start of a comment to end of line. The \\ character can be used as an escape character. - **verify-address** **=** **\** By default **inadyn** verifies both IPv4 and IPv6 addresses, making sure the address is a valid Internet address. Invalid addresses are, e.g., link local, loopback, multicast and known experimental addresses. For more information, see RFC3330. IP address validation can be disabled by setting this option to **false**. - **fake-address** **=** **\** When using SIGUSR1, to do a forced update, this option can be used to fake an address update with a “random” address in the 203.0.113.0/24 range, example address range from RFC5737, before updating with the actual IP address. This is completely outside spec., but can be useful for people who very rarely, if ever, get an IP address change. Because some DDNS service providers will not register even a forced update if the IP is the same. As a result the user could be deregistered as an inactive user. - **allow-ipv6** **=** **\** **Inadyn** can get an IPv6 address from an interface, or with an external checkip script. This option controls if IPv6 addresses should be allowed or discarded. By default this option is *false*, i.e. any IPv6 addresses found are discarded. - **iface** **=** **IFNAME** Use network interface **IFNAME** as source of IP address changes instead of querying an external server. With this option is enabled, the external IP check is disabled and **inadyn** will send DDNS updates using the IP address of the **IFNAME** network interface to *all* DDNS providers listed in the configuration file. This can be useful to register LAN IP addresses, or, when connected directly to a public IP address, to speed up the IP check if the DDNS provider's check-ip servers are slow to respond. This option can also be given as a command line option to [inadyn(8)](/inadyn/8.md), both serve a purpose, use whichever one works for you. - **iterations** **=** **\** Set the number of DNS updates. The default is *0*, which means infinity. - **period** **=** **SEC** How often the IP is checked, in seconds. Default: apxrox. 1 minute. Max: 10 days. - **forced-update** **=** **SEC** How often the IP should be updated even if it is not changed. The time should be given in seconds. Default is equal to 30 days. - **secure-ssl** **=** **\<** **true** \| **false** **\>** If the HTTPS certificate validation fails for a provider **inadyn** aborts the DDNS update before sending any credentials. When this setting is disabled, i.e. *false*, then **inadyn** will only issue a warning. By default this setting is enabled, because security matters. - **broken-rtc** **=** **\<** **true** \| **false** **\>** HTTPS certificates are only valid within specified time windows, so on systems without hardware real-time clock and default bootup time far in the past, false-positive validation fail is expected. When this setting is enabled, i.e. *true*, then **inadyn** will only issue a warning that the certificate is not valid yet. By default this setting is disabled, because security matters. - **ca-trust-file** **=** **FILE** By default **inadyn** uses the built-in path to the system's trusted CA certificates, both GnuTLS and Open/LibreSSL support this. As a fall-back, in case the API's to load CA certificates from the built-in path fails, **inadyn** also supports common default paths to Debian and RedHat CA bundles. This setting overrides the built-in paths and fallback locations and provides a way to specify the path to a trusted set of CA certificates, in PEM format, bundled into one file. - **user-agent** **=** **STRING** Specify the User-Agent string to send to the DDNS provider on checkip and update requests. Some providers require this field to be set to a specific string, some may be OK with "Mozilla/4.0". The default is to send "inadyn/VERSION SUPPORTURL", where VERSION is the current **inadyn** version, and SUPPORTURL is the upstream support URL. This can also be set on a per-provider basis, see below custom and provider section description. - **custom** **some@identifier** **{}** The **custom{}** and **provider{}** sections are very similar, except that the custom section allows customizing the DDNS update server details. For more details, see the description for **provider{}**, below. - **provider** **email@ddns-service.tld\[:ID\]** **{}** The **custom{}** and **provider{}** sections are very similar, except that the custom section allows customizing the DDNS update server details. See below list for supported DDNS providers and their **email@ddns-service.tld** identifiers. To support multiple users of the same DDNS provider, append *\[:ID\]* to the provider name. The *ID* can be any free form string or number as long as the combination is unique. Common settings in custom{} and provider{} sections are: - **include("/path/to/file")** Include settings from another file, supports tilde expansion, e.g. *~/.freedns.pw*. Any custom{} or provider{} setting can be included, and any amount of include statements may be used. - **ssl** **=** **\** Use HTTPS, both when checking for IP changes and updating the DNS record. Default is to use HTTPS (true). - **username** **=** **USERNAME.** The username, if applicable. This might be referred to as hash by some providers. - **password** **=** **PASSWORD** The password, if applicable. - **iface** **=** **IFNAME** Same as the global setting, but only for this provider. For more information, see above. - **checkip-server** **=** **\** This setting allows overriding the provider's default checkip server. The **default** keyword resolves to the built-in default, **http://ifconfig.me/ip**, which affect not only this setting, but also **checkip-path** and **checkip-ssl**. Any other value is the server name to query periodically for IP address changes. The optional *:port* argument defaults to *443*, see **checkip-ssl** for details. This is an optional setting. For **provider{}** sections it defaults to a pre-defined **checkip-server** and **checkip-path** for the given DDNS provider. For **custom()** DDNS setups it defaults to the built-in default (abvove). - **checkip-path** **=** **/some/checkip/url** Optional server path for check IP server, defaults to "/". When the **checkip-server** is set to **default**, this setting is ignored. - **checkip-ssl** **=** **\** This setting usually follows the **ssl** setting, but can be used to disable HTTPS for the IP address check. This might be needed for some providers that only support HTTPS for the DNS record update. However, when a custom **checkip-server** is defined for a provider, this setting does *not* follow the **ssl** setting. Default is to use HTTPS (true). - **checkip-command** **=** **/path/to/shell/command \[optional args\]** Shell command, or script, for IP address update checking. The command must output a text with the IP address to its standard output. The following environment variables are set: - INADYN\_PROVIDER contains the DDNS provider's full name in form **email@ddns-service.tld** - INADYN\_USER contains user's name *Example:* ``` checkip-command = "/sbin/ifconfig eth0 | grep 'inet addr'" ``` **Inadyn** will use the first occurrence in the command's output that looks like an address. Both IPv4 and IPv6 addresses are supported. - **hostname** **=** **HOSTNAME** - **hostname** **=** **{** **HOSTNAME1.name.tld**, **HOSTNAME2.name.tld** **}** Your hostname alias. To list multiple names, use the second form. - **user-agent** **=** **STRING** Same as the global setting, but only for this provider. If omitted it defaults to the global setting, which if unset uses the default **inadyn** user agent string. For more information, see above. - **wildcard** **=** **\** Enable domain name wildcarding of your domain name, for DDNS providers that support this, e.g. easydns.com and loopia.com. This means that anything typed before your hostname, e.g. www. or ftp., is also updated when your IP changes. Default: disabled. For **inadyn** \< 1.96.3 wildcarding was enabled by default. - **ttl** **=** **SEC** Time to live of your domain name. Only works with supported DDNS providers, e.g. cloudflare.com. - **proxied** **=** **\** Proxy DNS origin via provider's CDN network. Only works with supported DDNS providers, e.g. cloudflare.com. Default: false - **provider** **\[email@\]ddns-service\[.tld\]** **{}** Either a unique substring matching the provider, or or one of the exact matches to the following unique provider names: - **default@freedns.afraid.org** ⟨https://freedns.afraid.org⟩ - **ipv4@nsupdate.info** ⟨https://nsupdate.info⟩ - **default@duckdns.org** ⟨https://duckdns.org⟩ - **default@freemyip.com** ⟨https://freemyip.com⟩ - **default@loopia.com** ⟨https://www.loopia.com⟩ - **default@dyndns.org** Connect to ⟨https://www.dyndns.org⟩, i.e., ⟨https://dyn.com⟩ - **default@noip.com** ⟨https://www.noip.com⟩ - **default@no-ip.com** Handled by **default@noip.com** plugin. - **default@easydns.com** ⟨https://www.easydns.com⟩ - **default@dnsomatic.com** ⟨https://www.dnsomatic.com⟩ - **dyndns@he.net** ⟨https://dns.he.net⟩ - **default@tunnelbroker.net** IPv6 ⟨https://www.tunnelbroker.net⟩ by Hurricane Electric. - **default@sitelutions.com** ⟨https://www.sitelutions.com⟩ - **default@dnsexit.com** ⟨https://www.dnsexit.com⟩ - **default@zoneedit.com** ⟨https://zoneedit.com⟩ - **default@changeip.com** ⟨https://www.changeip.com⟩ - **default@dhis.org** ⟨https://www.dhis.org⟩ - **default@domains.google.com** ⟨https://domains.google⟩ - **default@ovh.com** ⟨https://www.ovh.com⟩ - **default@gira.de** ⟨https://giradns.com⟩ - **default@duiadns.net** ⟨https://www.duiadns.net⟩ - **default@ddnss.de** ⟨https://ddnss.de⟩ - **default@dynv6.com** ⟨https://dynv6.com⟩ - **default@ipv4.dynv6.com** ⟨https://ipv4.dynv6.com⟩ - **default@spdyn.de** ⟨https://spdyn.de⟩ - **default@strato.com** ⟨https://www.strato.com⟩ - **default@cloudxns.net** ⟨https://www.cloudxns.net⟩ - **dyndns@3322.org** ⟨https://www.3322.org⟩ - **default@dnspod.cn** ⟨https://www.dnspod.cn⟩ - **default@dynu.com** ⟨https://www.dynu.com⟩ - **default@selfhost.de** ⟨https://www.selfhost.de⟩ - **default@pdd.yandex.ru** ⟨https://connect.yandex.ru⟩ - **default@cloudflare.com** ⟨https://www.cloudflare.com⟩ - **default@goip.de** ⟨https://www.goip.de⟩ - **custom** **some@identifier** **{}** Specific to the custom provider section are the following settings: - **ddns-server** **=** **update.example.com** DDNS server name, not the full URL. - **ddns-path** **=** **/update?domain=** DDNS server path. By default the hostname is appended to the path, unless **append-myip=true** is set. Alternatively, [printf(3)](/printf/3.md) like format specifiers may be used for a fully customizable HTTP GET update request. The following format specifiers are currently supported: - **%u** username - **%p** password, if HTTP basic auth is not used - **%h** hostname - **%i** IP address With the following example: ``` username = myuser password = mypass ddns-path = "/update?user=%u&password=%p&domain=%h&myip=%i" hostname = YOURDOMAIN.TLD ``` the resulting update URL would be expanded to ``` /update?user=myuser&password=mypass&domain=YOURDOMAIN.TLD&myip=1.2.3.4 ``` However, the password is usually never sent in clear text in the HTTP GET URL. Most DDNS providers instead rely on HTTP basic auth., which **inadyn** always relays to the server in the HTTP header of update requests. **inadyn.conf** v2.1 and later defaults to HTTPS to protect your credentials, but some providers still do not support HTTPS. - **append-myip** **=** **true** Append your current IP to the the DDNS server update path. By default this setting is false and the hostname is appended. Unless the **ddns-path** is given with format specifiers, in which case this setting is unused. ## EXAMPLES Worth noting below is how two different user accounts can use the same DDNS provider, No-IP.com, by using the concept of instances ':N'. ``` period = 300 # Dyn.com provider dyndns.org { username = account1 password = secret1 hostname = { "my.example.com", "other.example.org" } } # FreeDNS. Remember the username must be in lower case # and password (max 16 chars) is case sensitive. provider freedns { username = lower-case-username password = case-sensitive-pwd hostname = some.example.com } # No-IP.com #1 # With multiple usernames at the same provider, index with :# provider no-ip.com:1 { checkip-server = "dynamic.zoneedit.com" checkip-path = "/checkip.html" checkip-ssl = false username = account21 password = secret21 hostname = example.no-ip.com } # No-IP.com #2 provider no-ip.com:2 { username = account22 password = secret22 hostname = another.no-ip.com } # Google Domains - notice use of '@' to update root entry provider domains.google.com:1 { hostname = @.mydomain.com username = your_username password = your_password } # Wildcard subdomains - notice the quoutes (required!) provider domains.google.com:2 { hostname = "*.mydomain.com" username = your_username password = your_password } # Loopia provider loopia.com { wildcard = true username = account3 password = secret3 hostname = example.com } # ddnss.de provider ddnss.de { username = your_username password = your_password hostname = your_host.ddnss.de } # spdyn.de provider spdyn.de { username = your_username password = your_password hostname = your_host.spdyn.de } # www.strato.com provider strato.com { username = your_username password = your_password hostname = example.com } # dynv6.com update using a custom checkip-command, which works # if you have access to an Internet-connected interface. Make # sure to verify the command works on your system first allow-ipv6 = true # required option for IPv6 atm. provider default@dynv6.com { username = your_token password = not_used hostname = { my.dynv6.net } # second host with comma checkip-command = "/sbin/ip -6 addr | grep inet6 | awk -F '[ ]+|/' '{print $3}' | grep -v ^::1 | grep -v ^fe80" } # IPv6 account at https://tunnelbroker.net provider tunnelbroker.net { username = xyzzy password = update-key-in-advanced-tab hostname = tunnel-id } # www.freemyip.com provider freemyip.com { password = your_token hostname = your_hostname.freemyip.com } # www.cloudxns.net provider cloudxns.net { username = your_api_key password = your_secret_key hostname = yourhost.example.com } # www.dnspod.cn provider dnspod.cn { username = your_api_id password = your_api_token hostname = yourhost.example.com } # www.cloudflare.com provider cloudflare.com { username = zone.name password = api_token # Create a unique custom api token with the following permissions: Zone.Zone - Read, Zone.DNS - Edit. hostname = hostname.zone.name ttl = 1 # optional, value of 1 is 'automatic'. proxied = false # optional. } # www.goip.de provider goip.de { username = username password = password hostname = hostname.goip.de } # www.namecheap.com custom namecheap { username = YOURDOMAIN.TLD password = mypass ddns-server = dynamicdns.park-your-domain.com ddns-path = "/update?domain=%u&password=%p&host=%h" hostname = { "@", "www", "test" } } # Generic example, check all details for your provider! custom example { username = myuser password = mypass checkip-server = checkip.example.com checkip-path = / checkip-ssl = false ddns-server = update.example.com ddns-path = "/update?hostname=" hostname = myhostname.example.net } ``` As of Inadyn 1.99.14 the generic plugin can also be used with providers that require the client's IP in the update request, which for example ⟨https://dyn.com⟩ requires: ``` # This emulates dyndns.org custom dyn.com { username = DYNUSERNAME password = DYNPASSWORD ddns-server = members.dyndns.org ddns-path = "/nic/update?hostname=YOURHOST.dyndns.org&myip=" append-myip = true hostname = YOURHOST } ``` Notice the use of **append-myip** which differs from above previous examples. Without this option set the default (backwards compatible) behavior is to append the hostname. An alternative, and perhaps more intuitive approach introduced in Inadyn v2.0, is to use the [printf(3)](/printf/3.md) like format specifiers mentioned previously. The same example look like this: ``` # This emulates dyndns.org custom dyn.com { ssl = false username = DYNUSERNAME password = DYNPASSWORD ddns-server = members.dyndns.org ddns-path = "/nic/update?hostname=%h.dyndns.org&myip=%i" hostname = YOURHOST } ``` ## SEE ALSO [inadyn(8)](/inadyn/8.md) The **inadyn** home page is ⟨https://github.com/troglobit/inadyn⟩ ## AUTHORS This manual page was initially written for the *Debian* *GNU/Linux* system by Shaul Karl ⟨mailto:shaul@debian.org⟩. Currently maintained by Joachim Wiberg ⟨mailto:troglobit@gmail.com⟩.