labunix https://blog.hatena.ne.jp/labunix/ labunix's blog https://labunix.hateblo.jp/ ■さくらVPSにSnortを導入 # apt-get install -y snort # tail /var/log/snort/alert [**] [1:527:8] BAD-TRAFFIC same SRC/DST [**] [Classification: Potentially Bad Traffic] [Priority: 2] 08/28-15:20:31.722756 0.0.0.0 -> 224.0.0.1 IGMP TTL:1 TOS:0xC0 ID:0 IpLen:24 DgmLen:32 DF IP Options (1) => RTRALT [Xref => htt… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Flabunix.hateblo.jp%2Fentry%2F20140828%2F1409219038" title="さくらVPSのINPUTパケットを制限する(Debian Wheezy) - labunix&#39;s blog" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2014-08-28 18:43:58 rich https://labunix.hateblo.jp/entry/20140828/1409219038 1.0 100%