> For the complete documentation index, see [llms.txt](https://k8.matthewdavis.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://k8.matthewdavis.io/tools/port-scanning.md).

# Port Scanning

```bash
kubectl run --image=appsoa/docker-alpine-nmap --rm -it nm -- \
            -Pn -p9200,9300 elasticsearch.es elasticsearch-discovery.es
```

```bash
Starting Nmap 7.40 ( https://nmap.org ) at 2018-02-03 16:54 UTC

Nmap scan report for elasticsearch.es (10.15.248.94)
Host is up (0.0013s latency).

rDNS record for 10.15.248.94: elasticsearch.es.svc.cluster.local

PORT     STATE    SERVICE
9200/tcp open     wap-wsp
9300/tcp filtered vrace

Nmap scan report for elasticsearch-discovery.es (10.15.252.251)
Host is up (0.00018s latency).

rDNS record for 10.15.252.251: elasticsearch-discovery.es.svc.cluster.local

PORT     STATE    SERVICE
9200/tcp filtered wap-wsp
9300/tcp open     vrace

Nmap done: 2 IP addresses (2 hosts up) scanned in 1.41 seconds
```