diff --git a/2025/xg-infra-guava.md b/2025/xg-infra-guava.md
index 642f049..0434769 100644
--- a/2025/xg-infra-guava.md
+++ b/2025/xg-infra-guava.md
@@ -23,9 +23,11 @@ Dedibox Scaleway Online.net
 * `apt install iptables`
 * `/usr/local/sbin/firewall-enable.sh`
 * `/etc/systemd/system/firewall.service`
-* `systemctl start firewall && sleep 120 && /usr/local/sbin/firewall-disable.sh`
-* `systemctl enable firewall.service`
-* 
+* Run in tmux so firewall testing can be done:
+	* `systemctl start firewall && sleep 120 && /usr/local/sbin/firewall-disable.sh`
+	* `/sbin/iptables -L -n -v`
+* Check if firewall works within 120 seconds (then it is disabled)
+* Enable firewall at boot: `systemctl enable firewall.service`
 
 See:
 * 
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