# iptables에서  icmp차단

<table border="1" id="bkmrk-perplexity%EC%97%90%EC%84%9C-%EC%83%9D%EC%84%B1%ED%95%9C-ai%EC%9D%B4" style="border-collapse: collapse; width: 100%;"><colgroup><col style="width: 99.881%;"></col></colgroup><tbody><tr><td>[![image.png](http://igoni.kr/uploads/images/gallery/2026-02/scaled-1680-/UzWimage.png)](http://igoni.kr/uploads/images/gallery/2026-02/UzWimage.png)

</td></tr><tr><td class="align-right">perplexity에서 생성한 AI이미지</td></tr></tbody></table>

iptables 기반으로 외부에서 ICMP 패킷 차단방법

```shell
$ iptables -A INPUT -p icmp --icmp-type echo-request -j REJECT

```