diff --git a/php/templates/containers.twig b/php/templates/containers.twig
index b7a1e363..9e7b19b4 100644
--- a/php/templates/containers.twig
+++ b/php/templates/containers.twig
@@ -92,11 +92,11 @@
                             <input class="button" type="submit" value="Submit" />
                         </form>
                         {% if skip_domain_validation == false %}
-                            Make sure that this server is reachable on Port 443 and you've correctly set up the DNS config for the domain that you enter. <br><br>
+                            Make sure that this server is reachable on port 443 (port 443/tcp is open/forwarded in your firewall/router) and that you've correctly set up the DNS config for the domain that you enter (set the A record to your public ipv4-address and the AAAA record to your public ipv6-address). <br><br>
                             <details>
                                 <summary>Click here for further hints</summary><br />
                                 If you should not have a domain yet, you can get one for free e.g. from duckduckdns.org and others.<br><br>
-                                If you have a dynamic IP-address, you can use e.g. <a href="https://ddclient.net/">DDclient</a> with a compatible domain provider for DNS updates.<br /><br/>
+                                If you have a dynamic public IP-address, you can use e.g. <a href="https://ddclient.net/">DDclient</a> with a compatible domain provider for DNS updates.<br /><br/>
                                 If you only want to install AIO locally without exposing it to the public internet or if you cannot do so, feel free to follow <b><a href="">this documentation</a></b>.<br><br>
                                 If you should be using Cloudflare Proxy for your domain, make sure to disable the Proxy feature temporarily as it might block the domain validation attempts.<br /><br/>
                                 If you try to install AIO behind a Reverse Proxy (like Apache, Nginx and else), and you run into issues getting your domain accepted, see <b><a href="https://github.com/nextcloud/all-in-one/blob/main/reverse-proxy.md#6-how-to-debug-things">this documentation</a></b> for how to debug things. <br /><br/>
@@ -528,9 +528,9 @@
                             <input type="checkbox" id="imaginary" name="imaginary"><label for="imaginary">Imaginary (for previews of heic, heif, illustrator, pdf, svg, tiff and webp)</label><br>
                         {% endif %}
                         {% if is_talk_enabled == true %}
-                            <input type="checkbox" id="talk" name="talk" checked="checked"><label for="talk">Nextcloud Talk (needs ports {{ talk_port }}/TCP and {{ talk_port }}/UDP open in your firewall/router)</label><br><br>
+                            <input type="checkbox" id="talk" name="talk" checked="checked"><label for="talk">Nextcloud Talk (needs ports {{ talk_port }}/TCP and {{ talk_port }}/UDP open/forward in your firewall/router)</label><br><br>
                         {% else %}
-                            <input type="checkbox" id="talk" name="talk"><label for="talk">Nextcloud Talk (needs ports {{ talk_port }}/TCP and {{ talk_port }}/UDP open in your firewall/router)</label><br><br>
+                            <input type="checkbox" id="talk" name="talk"><label for="talk">Nextcloud Talk (needs ports {{ talk_port }}/TCP and {{ talk_port }}/UDP open/forward in your firewall/router)</label><br><br>
                         {% endif %}
                         {% if is_onlyoffice_enabled == true %}
                             <input type="checkbox" id="onlyoffice" name="onlyoffice" checked="checked"><label for="onlyoffice">OnlyOffice</label><br>