DNSSEC - OARC Size Tester

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Talk from @mwl at BSDCAN 2022

https://www.youtube.com/watch?v=1n62VZj-CKI

OARC Reply Size Tester

dig +short rs.dns-oarc.net TXT

Host1 - good :)

# dig +short rs.dns-oarc.net TXT
rst.x4090.rs.dns-oarc.net.
rst.x4058.x4090.rs.dns-oarc.net.
rst.x4064.x4058.x4090.rs.dns-oarc.net.
"45.15.80.80 DNS reply size limit is at least 4090"
"45.15.80.80 sent EDNS buffer size 4096"

Host2 - bad :(

# dig +short rs.dns-oarc.net TXT
rst.x1196.rs.dns-oarc.net.
rst.x1206.x1196.rs.dns-oarc.net.
rst.x1204.x1206.x1196.rs.dns-oarc.net.
"74.63.25.240 DNS reply size limit is at least 1206"
"74.63.25.240 sent EDNS buffer size 1232"

sha256: 110b220f93eff767b7e4d488294b00ede4f4509258d0148704b145df79fa9821