Cybersecurity

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Weird server requests (lemmy.dbzer0.com)

submitted 19 hours ago by WrenHavoc@lemmy.dbzer0.com to c/cybersecurity@sh.itjust.works

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So I'm the server admin and web developer for my school's robotics team. I look through the servers access logs every once in a while just to check on things. I keep seeing requests that look like someone's scanning for vulns. But I'm seeing something I've never seen before. It looks like someone is sending requests in machine code and I have no idea why or what it would do???

here's the request:

"\x03\x00\x00\x13\x0E\xE0\x00\x00\x00\x00\x00\x01\x00\x08\x00\x02\x00\x00\x00" 400 166 "-" "-"

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[–] thr0w4w4y2@sh.itjust.works 1 points 16 hours ago* (last edited 14 hours ago) (1 children)

they’re all attack attempts. set up fail2ban, enforce ssh key-based authentication, run it in a non standard port and create firewall allow lists for trusted users, networks or countries if you can. make sure everything is patched frequently.

expect consequences for running onion hidden services - captchas and denied service for that IP address, but also attacks against the hidden service itself.

[–] willougr@lemmy.org 1 points 14 hours ago (1 children)

Probably best to keep the ssh key-based authentication...

[–] thr0w4w4y2@sh.itjust.works 1 points 14 hours ago

ah yeah I meant to type “enable”.

thanks - changed