diff --git a/README.md b/README.md
index 73f548b..1152196 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,10 @@
 My customization recipe for SystemRescue:
 ===================================================
 ## Dependencies
-squashfs-tools, xorriso (provided by dev-libs/libisoburn package in gentoo GNU/Linux - WARNING: requires zstd USE flag enabled) and
-[sysrescue-customize.sh](https://gitlab.com/systemrescue/systemrescue-sources/-/raw/main/airootfs/usr/share/sysrescue/bin/sysrescue-customize?inline=false)
+squashfs-tools, xorriso (provided by dev-libs/libisoburn package in gentoo GNU/
+Linux - WARNING: requires zstd USE flag enabled) and
+[sysrescue-customize.sh](https://gitlab.com/systemrescue/systemrescue-sources/-
+/raw/main/airootfs/usr/share/sysrescue/bin/sysrescue-customize?inline=false)
 are required to apply these customizations
 
 ## Description
@@ -16,8 +18,8 @@ This recipe adds the following to the custom ISO:
 - It adds a settings yaml file which overrides the default settings so the
   custom SystemRescue starts with my own preferences, such as a spanish
   keyboard, it copies the system into RAM (so the boot device can be removed), 
-  it adds a persistent storage volume (see: [persistent-storage](persistent-storage.md)
-  for further instructions) and it automatically starts the graphical environment.
+  and it adds a persistent storage volume (see: [persistent-storage](persistent
+  -storage.md) for further instructions).
 
 Please note the ".squashfs-pseudo" file is important to enforce correct
 permissions and ownership on the /root directory and its contents. You should
diff --git a/iso_add/autorun/open-ssh-port.sh b/iso_add/autorun/open-ssh-port.sh
deleted file mode 100755
index 6439ab9..0000000
--- a/iso_add/autorun/open-ssh-port.sh
+++ /dev/null
@@ -1,4 +0,0 @@
-#!/bin/bash
-# Allow incoming and outgoing ssh
-iptables -A INPUT -p tcp --dport 22 -j ACCEPT
-iptables -A OUTPUT -p tcp --dport 22 -j ACCEPT
diff --git a/iso_add/autorun/set-firewall-rules.sh b/iso_add/autorun/set-firewall-rules.sh
new file mode 100755
index 0000000..3726738
--- /dev/null
+++ b/iso_add/autorun/set-firewall-rules.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+# Allow incoming and outgoing ssh, dns and dhcp
+iptables -I INPUT -p tcp --dport 22 -j ACCEPT
+iptables -I OUTPUT -p tcp --dport 22 -j ACCEPT
+iptables -I INPUT -p tcp --dport 22 -j ACCEPT
+iptables -I INPUT -p udp --dport 53 -j ACCEPT
+iptables -I INPUT -p tcp --dport 53 -j ACCEPT
+iptables -I INPUT -p udp --dport 68 -j ACCEPT
+iptables -I OUTPUT -p tcp --dport 22 -j ACCEPT
+iptables -I OUTPUT -p udp --dport 53 -j ACCEPT
+iptables -I OUTPUT -p tcp --dport 53 -j ACCEPT
+iptables -I OUTPUT -p udp --dport 67 -j ACCEPT
diff --git a/iso_add/sysrescue.d/500-settings.yaml b/iso_add/sysrescue.d/500-settings.yaml
index 84de329..9cb8a3a 100644
--- a/iso_add/sysrescue.d/500-settings.yaml
+++ b/iso_add/sysrescue.d/500-settings.yaml
@@ -2,7 +2,7 @@ global:
     copytoram: true
     checksum: false
     loadsrm: true
-    dostartx: true
+    dostartx: false
     nofirewall: false
     setkmap: es
     cow_label: "PERSISTENCE"
@@ -10,10 +10,9 @@ global:
 autorun:
     ar_nowait: true
     exec:
-        open-ssh-port.sh:
-            path: "/run/archiso/bootmnt/autorun/open-ssh-port.sh"
+        set-firewall-rules:
+            path: "/run/archiso/bootmnt/autorun/set-firewall-rules.sh"
 
 sysconfig:
     bash_history:
         100: ""
-    timezone: "America/Argentina/Buenos_Aires"