I've been working for a big corporate company as junior system engineer and getting nicely to understand HTB/iproute2/iptables etc,
The ordinary users(about 500 users), can pop / smtp / skype out on the network, but I can't ssh out, cause they blocked the ports. Thought of being clever, I let my home linux listen on port 443 or 110 for ssh connection, but it wont connect, I even test it using telnet and it show up ssh, but it wont connect with my ssh client, but normal pop and https works. How do they block my ssh connection on port 443, but normal https work?
Do they use TOS with iptables?,, bit of a brain teaser for me
Thanks
Sew
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