How to pass a variable to the server?

Question

bash

Hello.
Script:

echo "Enter IP: $S"
read S
printf "CHECK BLOCK IP: $S " 
echo
ssh -tt [email protected]	 /bin/bash << 'EOT'
iptables-save | grep  | grep $S
exit
EOT
read -p "Press enter to continue!!!!"
echo "SUCCESS!!!"

And the server reads the command directly from the variable without substituting the IP.

Answer 1

You just had to remove the quotes 'EOT'