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https://github.com/hrbrmstr/extip
℁ Retrieve your external IP address via DNS
https://github.com/hrbrmstr/extip
dns external-ip go golang my-ip
Last synced: 2 months ago
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℁ Retrieve your external IP address via DNS
- Host: GitHub
- URL: https://github.com/hrbrmstr/extip
- Owner: hrbrmstr
- License: mit
- Created: 2023-02-26T11:42:35.000Z (almost 2 years ago)
- Default Branch: batman
- Last Pushed: 2023-03-03T11:35:22.000Z (almost 2 years ago)
- Last Synced: 2024-08-03T22:19:12.921Z (4 months ago)
- Topics: dns, external-ip, go, golang, my-ip
- Language: Go
- Homepage:
- Size: 804 KB
- Stars: 18
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: LICENSE.md
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- jimsghstars - hrbrmstr/extip - ℁ Retrieve your external IP address via DNS (Go)
README
# extip - retrieve your external IP address via DNS
Small Golang package/cli that uses special DNS resolvers to return your external IP address.
By default it uses Google, OpenDNS, and Akamai. If there is a conflict between the resolver answers a message will be delivered on stderr with the conflicting values.
Alternatively, you can specify an [extip server](https://github.com/hrbrmstr/extip-svr) to use. See below for how to do that.
## References
- [Bizarre and Unusual Uses of DNS](https://fosdem.org/2023/schedule/event/dns_bizarre_and_unusual_uses_of_dns/)
- [Akamai blog](https://www.akamai.com/blog/developers/introducing-new-whoami-tool-dns-resolver-information)
## Build
```
just build # requires https://github.com/casey/just
```
## Install
```
go install -ldflags "-s -w" github.com/hrbrmstr/extip@latest
```
## Options
```
Lookup external IP address via DNS.
Defaults to using Akamai, OpenDNS, and Google services.
You can specify an extip server via the following command line options.
NOTE: Both server and domain should be specified to override default behavior.
More info about running an extip server can be found at .
extip 0.2.0
Usage: extip [--server EXTIP_SERVER] [--domain DOMAIN] [--record-type RECORD_TYPE] [--port PORT]
Options:
--server EXTIP_SERVER, -s EXTIP_SERVER
extip-svr IP/FQDN. e.g., ip.rudis.net [env: EXTIP_SERVER]
--domain DOMAIN, -d DOMAIN
Domain to use for IP Lookup. e.g., myip.is [env: EXTIP_DOMAIN]
--record-type RECORD_TYPE, -r RECORD_TYPE
DNS record type to lookup. One of TXT or A. [default: TXT, env: EXTIP_RECORD_TYPE]
--port PORT, -p PORT Port extip resolver is listening on. [default: 53, env: EXTIP_PORT]
--help, -h display this help and exit
```
## Usage
Default:
```
extip
```
Use an extip server:
```
extip -s ip.rudis.net -d ip.is
```