Please, advise how to configure on OS Linux level to listen to only to localhost connections. TCP and UDP services open for local interaction on my device making the device open to ssh brute-force, fuzzing, and another attack. If possible use Yocto recipe modifications. Thanks in advance for any replies.
1 Answers
If you install the firewall ufw the defaults are
Allow any outgoing connections
Deny any incoming connections
If you cannot install ufw, which sits on top of iptables, use it directly
iptables -P INPUT DROP
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