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```
 
sudo apt install zlib1g zlib1g-dev
```

$ ls
requires1.pm
$ cpanm --verbose --installdeps .
...
requires 'WWW::Form::UrlEncoded::XS' => '0.25';
1;
$

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$ sudo fail2ban-client status sshd
Status for the jail: sshd
|- Filter
...
   |- Total banned:    0
   `- Banned IP list:    
$

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Crontab to broadcast RPi's address and name

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crontab -e

@reboot hostname | socat -s - UDP-DATAGRAM:255.255.255.255:12340,broad
+cast 2>/dev/null * * * hostname | socat -s - UDP-DATAGRAM:255.255.255
+.255:12340,broadcast 2>/dev/null

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$ sudo  ufw allow in 12340/udp
Rule added
Rule added (v6)
$

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$ pwd
/home/pi/Documents/curate/req
$ ls
...
commands saved in 1.udp.txt
  DB<4> q                                                             
+          
$

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echo "HELLO xyZ129" | socat - UDP-DATAGRAM:255.255.255.255:12340,broad
+cast

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sudo apt-get build-dep libnet-ssleay-perl