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Hands-on DNSSEC with DNSViz

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Modify Path MTU (9.28 – 9.29)<br />

• Drop UDP resp<strong>on</strong>ses <strong>with</strong> payloads larger than 512 bytes<br />

# iptables -A OUTPUT -p udp --sport 53 \<br />

-m length --length 540:65535 -j DROP<br />

$ ./dnsviz_analyze example.com<br />

$ firefox example.com.html &<br />

Verisign Public<br />

97

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