mirror of
https://github.com/dcarrillo/whatismyip.git
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206 lines
8.2 KiB
Markdown
206 lines
8.2 KiB
Markdown
# What is my IP address
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[](https://github.com/dcarrillo/whatismyip/actions)
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[](https://github.com/dcarrillo/whatismyip/actions/workflows/codeql-analysis.yml)
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[](https://goreportcard.com/report/github.com/dcarrillo/whatismyip)
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[](https://github.com/dcarrillo/whatismyip/releases/)
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[](./LICENSE)
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- [What is my IP address](#what-is-my-ip-address)
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- [Features](#features)
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- [Endpoints](#endpoints)
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- [DNS discovery](#dns-discovery)
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- [Build](#build)
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- [Usage](#usage)
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- [Examples](#examples)
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- [Run a default TCP server](#run-a-default-tcp-server)
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- [Run a TLS (HTTP/2) and enable What is my DNS](#run-a-tls-http2-and-enable-what-is-my-dns)
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- [Run an HTTP/3 server](#run-an-http3-server)
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- [Run a default TCP server with a custom template and trust a pair of custom headers set by an upstream proxy](#run-a-default-tcp-server-with-a-custom-template-and-trust-a-pair-of-custom-headers-set-by-an-upstream-proxy)
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- [Download](#download)
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- [Docker](#docker)
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- [Run a container locally using test databases](#run-a-container-locally-using-test-databases)
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- [From Docker Hub](#from-docker-hub)
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> [!NOTE]
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> Since version 2.3.0, the application includes an optional client [DNS discovery](#dns-discovery)
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Just another "what is my IP address" service, including geolocation, TCP open port checking, and headers information. Written in go with high performance in mind,
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it uses [gin](https://github.com/gin-gonic/gin) which uses [httprouter](https://github.com/julienschmidt/httprouter) a lightweight high performance HTTP multiplexer.
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Take a look at [ifconfig.es](https://ifconfig.es) a live site using `whatismyip` and the `DNS discovery` enabled.
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Get your public IP easily from the command line:
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```bash
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curl ifconfig.es
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127.0.0.1
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curl -6 ifconfig.es
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::1
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```
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Get the IP of your DNS provider:
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```bash
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curl -L dns.ifconfig.es
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2a04:e4c0:47::67 (Spain / OPENDNS)
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```
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## Features
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- TLS and HTTP/2.
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- Experimental HTTP/3 support. HTTP/3 requires a TLS server running (`-tls-bind`), as HTTP/3 starts as a TLS connection that then gets upgraded to UDP. The UDP port is the same as the one used for the TLS server.
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- Beta DNS discovery: A best-effort approach to discovering the DNS server that is resolving the client's requests.
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- Can run behind a proxy by trusting a custom header (usually `X-Real-IP`) to figure out the source IP address. It also supports a custom header to resolve the client port, if the proxy can only add a header for the IP (for example a fixed header from CDNs) the client port is shown as unknown.
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- IPv4 and IPv6.
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- Geolocation info including ASN. This feature is possible thanks to [maxmind](https://dev.maxmind.com/geoip/geolite2-free-geolocation-data?lang=en) GeoLite2 databases. In order to use these databases, a license key is needed. Please visit Maxmind site for further instructions and get a free license.
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- Checking TCP open ports.
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- High performance.
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- Self-contained server that can reload GeoLite2 databases and/or SSL certificates without stop/start. The `hup` signal is honored.
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- HTML templates for the landing page.
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- Text plain and JSON output.
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## Endpoints
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- https://ifconfig.es/
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- https://ifconfig.es/client-port
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- https://ifconfig.es/json (this is the same as `curl -H "Accept: application/json" https://ifconfig.es/`)
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- https://ifconfig.es/geo
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- https://ifconfig.es/geo/city
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- https://ifconfig.es/geo/country
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- https://ifconfig.es/geo/country_code
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- https://ifconfig.es/geo/latitude
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- https://ifconfig.es/geo/longitude
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- https://ifconfig.es/geo/postal_code
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- https://ifconfig.es/geo/time_zone
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- https://ifconfig.es/asn
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- https://ifconfig.es/asn/number
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- https://ifconfig.es/asn/organization
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- https://ifconfig.es/all
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- https://ifconfig.es/headers
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- https://ifconfig.es/<header_name>
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- https://ifconfig.es/scan/tcp/<port_number>
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- https://dns.ifconfig.es
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## DNS discovery
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The DNS discovery works by forcing the client to make a request to `<uuid>.dns.ifconfig.es` this DNS request is handled by a microdns server
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included in the `whatismyip` binary. In order to run the discovery server, a configuration file in the following form has to be created:
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```yaml
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---
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domain: dns.example.com
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redirect_port: ":8000"
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resource_records:
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- "1800 IN SOA xns.example.com. hostmaster.example.com. 1 10000 2400 604800 1800"
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- "3600 IN NS xns.example.com."
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ipv4:
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- "127.0.0.2"
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ipv6:
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- "aaa:aaa:aaa:aaaa::1"
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```
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The DNS authority for example.com has delegated the subdomain zone `dns.example.com` to the server running the `whatismyip` service.
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The client can request the URL `dns.example.com` by following the redirection `curl -L dns.example.com`.
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To avoid the redirection, you can provide a valid URL, for example, for the real [ifconfig.es](https://ifconfig.es):
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```bash
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curl $(uuidgen).dns.ifconfig.es
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curl $(cat /proc/sys/kernel/random/uuid).dns.ifconfig.es
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```
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## Build
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Golang >= 1.22 is required.
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`make build`
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## Usage
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```text
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Usage of whatismyip:
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-bind string
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Listening address (see https://pkg.go.dev/net?#Listen) (default ":8080")
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-enable-http3
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Enable HTTP/3 protocol. HTTP/3 requires --tls-bind set, as HTTP/3 starts as a TLS connection that then gets upgraded to UDP. The UDP port is the same as the one used for the TLS server.
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-enable-secure-headers
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Add sane security-related headers to every response
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-geoip2-asn string
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Path to GeoIP2 ASN database
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-geoip2-city string
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Path to GeoIP2 city database
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-resolver string
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Path to the resolver configuration. It actually enables the resolver for DNS client discovery.
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-template string
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Path to template file
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-tls-bind string
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Listening address for TLS (see https://pkg.go.dev/net?#Listen)
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-tls-crt string
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When using TLS, path to certificate file
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-tls-key string
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When using TLS, path to private key file
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-trusted-header string
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Trusted request header for remote IP (e.g. X-Real-IP). When using this feature if -trusted-port-header is not set the client port is shown as 'unknown'
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-trusted-port-header string
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Trusted request header for remote client port (e.g. X-Real-Port). When this parameter is set -trusted-header becomes mandatory
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-version
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Output version information and exit
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```
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## Examples
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### Run a default TCP server
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```bash
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./whatismyip -geoip2-city ./test/GeoIP2-City-Test.mmdb -geoip2-asn ./test/GeoLite2-ASN-Test.mmdb
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```
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### Run a TLS (HTTP/2) and enable What is my DNS
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```bash
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./whatismyip -geoip2-city ./test/GeoIP2-City-Test.mmdb -geoip2-asn ./test/GeoLite2-ASN-Test.mmdb \
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-bind "" -tls-bind :8081 -tls-crt ./test/server.pem -tls-key ./test/server.key \
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-resolver ./test/resolver.yml
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```
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### Run an HTTP/3 server
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```bash
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./whatismyip -geoip2-city ./test/GeoIP2-City-Test.mmdb -geoip2-asn ./test/GeoLite2-ASN-Test.mmdb \
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-bind "" -tls-bind :8081 -tls-crt ./test/server.pem -tls-key ./test/server.key -enable-http3
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```
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### Run a default TCP server with a custom template and trust a pair of custom headers set by an upstream proxy
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```bash
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./whatismyip -geoip2-city ./test/GeoIP2-City-Test.mmdb -geoip2-asn ./test/GeoLite2-ASN-Test.mmdb \
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-trusted-header X-Real-IP -trusted-port-header X-Real-Port -template mytemplate.tmpl
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```
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## Download
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Download the latest version from [github](https://github.com/dcarrillo/whatismyip/releases)
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## Docker
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An ultra-light (~4MB) image is available on [docker hub](https://hub.docker.com/r/dcarrillo/whatismyip). Since version `2.1.2`, the binary is compressed using [upx](https://github.com/upx/upx).
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### Run a container locally using test databases
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`make docker-run`
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### From Docker Hub
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```bash
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docker run --tty --interactive --rm \
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-v $PWD/<path to city database>:/tmp/GeoIP2-City-Test.mmdb:ro \
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-v $PWD/<path to ASN database>:/tmp/GeoLite2-ASN-Test.mmdb:ro -p 8080:8080 \
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dcarrillo/whatismyip:latest \
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-geoip2-city /tmp/GeoIP2-City-Test.mmdb \
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-geoip2-asn /tmp/GeoLite2-ASN-Test.mmdb
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```
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