Port Firewall Bypasses

Discussions focus on using non-standard or common ports like 80/443 for services such as SSH to evade firewall restrictions in corporate, hotel, or public networks, along with debates on the pros, cons, and security implications.

📉 Falling 0.4x Security
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#2393
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Keywords

ISP SYN OP SQL TCP ANY HTTP i.e NetComm openbsd.org port ports 80 listening non standard bind 5000 server http localhost

Sample Comments

LoganDark Aug 27, 2023 View on HN

If it's only for certain ports, they can just use non-standard ports.

Zak Dec 24, 2010 View on HN

Listening on an unusual port can be a problem for users behind various corporate, hotel and public wifi firewalls.

grandpoobah Mar 17, 2020 View on HN

Isn't using port 80 a trick to avoid being blocked by firewalls?

ikiris Apr 27, 2023 View on HN

Careful, you'll also summon the people who block port 80/443 UDP

corndoge Aug 25, 2017 View on HN

what's wrong with nonstandard ports?

pthr Jan 12, 2023 View on HN

Great service!Could you consider allowing for ports other than 7878? Would be nice in restricted network environments. Like that of my company; it's allowing only the more common ports to WAN.

W4ldi Feb 4, 2020 View on HN

if it's just filtering of certain ports, you can just set your ssh port to 80 or 443

Hello71 Dec 4, 2012 View on HN

That kinda defeats the purpose of restricting ports under 1024.

yaur Sep 1, 2022 View on HN

this is terrible advice given by someone that doesn't understand why privileged ports exist.

VWWHFSfQ Nov 28, 2020 View on HN

ah yes. something that does not clash with extremely common default ports.