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# probehost2
an http endpoint to query network diagnosis tools from remote hosts
a http endpoint to query network diagnosis tools from remote hosts
- <a href="#probehost2">Overview</a>
- <a href="#disclaimer">Disclaimer</a>
@ -15,14 +15,15 @@ an http endpoint to query network diagnosis tools from remote hosts
- <a href="#ping">Ping</a>
- <a href="#mtr">MTR</a>
- <a href="#traceroute">Traceroute</a>
- <a href="#nping">Nping</a>
# Disclaimer
Dont expect good or even mediocre code here. This is my first take at go and is mostly for myself to learn. Suggestions and improvements are welcome.
Don't expect good or even mediocre code here. This is my first take at go and is mostly for myself to learn. Suggestions and improvements are welcome.
Please note that this project does not include any kind of rate limiting or other protection. It is therefore heavily advised to only make it publicly reachable if a reverse proxy is in place. A sample config for <a href="caddyserver.com/">Caddy</a> can be found in the `caddy` subfolder.
# Installation
The runtime dependencies are currently `iputils`, `traceroute` and `mtr` (sometimes called `mtr-tiny`). `iputils` and `traceroute` can be substituted by `busybox`.
The runtime dependencies are currently `iputils`, `traceroute`, `nping` (usually provided by nmap) and `mtr` (sometimes called `mtr-tiny`). `iputils` and `traceroute` can be substituted by `busybox`.
## Building
The app can be built with the latest Go toolchain.
@ -43,12 +44,12 @@ Example files for a systemd service can be found in the `systemd` subfolder.
## Docker
A docker container based on <a href="https://alpinelinux.org">Alpine</a> can be built by using the included dockerfile (`docker/Dockerfile`).
```sh
docker build -f docker/Dockerfile . -t byreqz/probehost2:latest
docker build -f docker/Dockerfile . -t https://reg.nils.lol/byreqz/probehost2:latest
```
A compose file can also be found in `docker/docker-compose.yml`.
## Proxy
Its recommended to only run this app together with a rate-limiting reverse-proxy. An example configuration for <a href="caddyserver.com/">Caddy</a> can be found in the `caddy` subfolder.
It's recommended to only run this app together with a rate-limiting reverse-proxy. An example configuration for <a href="caddyserver.com/">Caddy</a> can be found in the `caddy` subfolder.
# Usage
## Server
@ -58,9 +59,9 @@ The app currently has 4 runtime flags:
- `-x / --disable-x-forwarded-for` -- disables checking for the X-Forwarded-For header
- `-l / --allow-private` -- allows lookups of private IP ranges
All of the Flags also have an accompanying environment value: `PROBEHOST_LOGPATH`, `PROBEHOST_ALLOW_PRIVATE`, `PROBEHOST_LISTEN_PORT` and `PROBEHOST_DISABLE_X_FORWARDED_FOR` but the options given via commandline have priority.
All the Flags also have an accompanying environment value: `PROBEHOST_LOGPATH`, `PROBEHOST_ALLOW_PRIVATE`, `PROBEHOST_LISTEN_PORT` and `PROBEHOST_DISABLE_X_FORWARDED_FOR` but the options given via commandline have priority.
The app will log every request including the IP thats querying and show failed requests on stdout.
The app will log every request including the IP that's querying and show failed requests on stdout.
Requests that contain an X-Forwarded-For header (implying the app is behind a reverse proxy) will automatically log that address instead of the requesting IP (the proxy itself), this can be turned off with -x.
@ -68,7 +69,7 @@ Requests that contain an X-Forwarded-For header (implying the app is behind a re
### General
The app can be queried via HTTP/HTTPS with the following scheme:
```
https://[address]/[command]/[hosts]/[options]
https://[address]/[command]/[host](_[port]),[host].../[options]
```
- [address] = the IP or domain serving the site
@ -76,7 +77,8 @@ https://[address]/[command]/[hosts]/[options]
- ping
- mtr
- traceroute
- [hosts] = can be one or more hosts query, seperated by a comma
- [host] = can be one or more hosts query, seperated by a comma
- [port] = port to be queried, optional
- [options] = options to run the command with, seperated by a comma
All inputs are validated and invalid input is discarded. If the request contains no valid data, the server will return HTTP 500.
@ -131,7 +133,7 @@ Available options are:
- `c10` / `count10`: send 10 pings
Example query:
```
```sh
$ curl http://localhost:8000/mtr/localhost/c1,z
Start: 2022-01-02T00:06:56+0100
HOST: xxx Loss% Snt Last Avg Best Wrst StDev
@ -155,9 +157,37 @@ Available options are:
- `b` / `back`: Guess the number of hops in the backward path and print if it differs
Example query:
```
```sh
$ curl http://localhost:8000/tracert/localhost/i
traceroute to localhost (127.0.0.1), 30 hops max, 60 byte packets
1 localhost (127.0.0.1) 0.063 ms 0.008 ms 0.006 ms
```
### Nping
The default options are:
- `c3`: send 3 pings
Available options are:
- `4` / `force4`: force IPv4
- `6` / `force6`: force IPv6
- `u` / `udp`: use UDP
- `t` / `tcp`: use TCP
- `v` / `verbose`: be verbose
- `c1` / `count1`: send 1 ping
- `c3` / `count3`: send 3 pings
- `c5` / `count5`: send 5 pings
Example query:
```sh
$ curl localhost:8000/nping/localhost_22
Starting Nping 0.7.92 ( https://nmap.org/nping ) at 2022-05-29 15:28 CEST
SENT (0.0022s) Starting TCP Handshake > localhost:22 (127.0.0.1:22)
RCVD (0.0133s) Handshake with localhost:22 (127.0.0.1:22) completed
SENT (1.0041s) Starting TCP Handshake > localhost:22 (127.0.0.1:22)
RCVD (1.0089s) Handshake with localhost:22 (127.0.0.1:22) completed
SENT (2.0071s) Starting TCP Handshake > localhost:22 (127.0.0.1:22)
RCVD (2.0090s) Handshake with localhost:22 (127.0.0.1:22) completed
Max rtt: 11.130ms | Min rtt: 1.945ms | Avg rtt: 5.965ms
TCP connection attempts: 3 | Successful connections: 3 | Failed: 0 (0.00%)
Nping done: 1 IP address pinged in 2.01 seconds
```