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http_proxy="http://proxy.example.com:port/"
https_proxy="https://proxy.example.com:port/"
ftp_proxy="ftp://proxy.example.com:port/"
no_proxy="localhost,127.0.0.1,localaddress,.localdomain.com"

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sudo iptables -P INPUT DROP
sudo iptables -P FORWARD DROP
sudo iptables -P OUTPUT ACCEPT

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sudo iptables -A INPUT -p tcp --dport 22 -j ACCEPT

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sudo iptables-save | sudo tee /etc/iptables.up.rules
sudo iptables-restore < /etc/iptables.up.rules

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