diff --git a/README.md b/README.md
index 1878abb..cc28be9 100644
--- a/README.md
+++ b/README.md
@@ -7,14 +7,19 @@
 auto url=https://vogsphere.baco.net/baco/born2beroot/raw/branch/master/preseed.cfg
 ```
 
+Debian Preseed:
 - [Preseed](https://wiki.debian.org/DebianInstaller/Preseed)
 - [Automating the installation using preseeding](https://www.debian.org/releases/stable/amd64/apb.en.html)
 - [example-preseed.txt](https://www.debian.org/releases/stable/example-preseed.txt)
 - [partman-auto recipe](https://github.com/xobs/debian-installer/blob/master/doc/devel/partman-auto-recipe.txt)
 - [Preseeding Full Disk Encryption](https://www.linuxjournal.com/content/preseeding-full-disk-encryption)
 - [Debian worldwide mirror sites](https://www.debian.org/mirror/list)
+
+Security:
 - [PAM pwquality](https://linux.die.net/man/8/pam_pwquality)
 - [pwquality.conf](https://linux.die.net/man/5/pwquality.conf)
+- [ufw](https://www.digitalocean.com/community/tutorials/ufw-essentials-common-firewall-rules-and-commands)
+- [sudoers](https://linux.die.net/man/5/sudoers)
 
 ```
 curl -sLo preseed.cfg https://www.debian.org/releases/stable/example-preseed.txt