# client connection issue **URL:** \ **Category:** 📱 Desktop & mobile clients\ **Tags:** desktop-client, windows\ **Created:** [July 28, 2025, 11:13am UTC](https://help.nextcloud.com/t/client-connection-issue/229422 "2025-07-28T11:13:36Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![xjaco](https://help.nextcloud.com/letter_avatar/xjaco/32/6_22734026db12803ebb3e059622ac3534.png) [@xjaco](https://help.nextcloud.com/u/xjaco)\ **Post date:** [July 28, 2025, 11:13am UTC](https://help.nextcloud.com/t/client-connection-issue/229422/1 "2025-07-28T11:13:36Z")
Hello community, I’m a new user and I’m having a connection problem. I installed NextCloud on my Umbrel device at home. It works great at home and on my mobile device too. Unfortunately, I can’t connect from the office. I’m using the Windows client and entering the address of my home cloud [http://xxx.xxx.xxx.xx:8081](http://xxx.xxx.xxx.xx:8081) after a long attempt it says: connection timed out!!! Can anyone help me??? Thanks in advance ---
**Author:** ![tflidd](https://help.nextcloud.com/letter_avatar/tflidd/32/6_22734026db12803ebb3e059622ac3534.png) [@tflidd](https://help.nextcloud.com/u/tflidd)\ **Post date:** [July 29, 2025, 7:03am UTC](https://help.nextcloud.com/t/client-connection-issue/229422/2 "2025-07-29T07:03:40Z")
> [@xjaco](#): > > It works great at home and on my mobile device too. > Unfortunately, I can’t connect from the office. and the mobile device works from home, but also from a cellular network (outside your home)? At work, can you open the URL in the browser of your mobile device? It might be that hotel networks, company networks often block all ports except for 80 and 443. But there can be other issues as well. ---
**Author:** ![bb77](https://help.nextcloud.com/letter_avatar/bb77/32/6_22734026db12803ebb3e059622ac3534.png) [@bb77](https://help.nextcloud.com/u/bb77)\ **Post date:** [July 29, 2025, 8:37am UTC](https://help.nextcloud.com/t/client-connection-issue/229422/3 "2025-07-29T08:37:30Z")
> [@xjaco](#): > > [http://xxx.xxx.xxx.xx:8081](http://xxx.xxx.xxx.xx:8081) You really shouldn’t access your Nextcloud like that from anywhere outside your local network. Otherwise, all data, including your password, will be transmitted unencrypted over the internet. Also, @tflidd is right: many corporate networks only allow traffic on ports 80 and 443. So you need to change the port to 443 and, at the very least, use self-signed certificates to ensure your traffic is encrypted. That said, I strongly recommend registering a domain name and taking the time to learn how to properly configure your web server or a reverse proxy with valid TLS certificates. Without that, you really shouldn’t expose your Nextcloud instance to the internet. ---
**Author:** ![scubamuc](https://help.nextcloud.com/user_avatar/help.nextcloud.com/scubamuc/32/63165_2.png) [@scubamuc](https://help.nextcloud.com/u/scubamuc)\ **Post date:** [July 29, 2025, 8:47am UTC](https://help.nextcloud.com/t/client-connection-issue/229422/4 "2025-07-29T08:47:17Z")
> [@xjaco](#): > > I’m a new user and I’m having a connection problem. this may get you started with some basic information: > [@101: Self-hosting information for beginners](https://help.nextcloud.com/t/101-self-hosting-information-for-beginners/187015): > > Self-hosting is managing your own applications and data instead of relying on external services. It offers greater control, privacy, and customization but comes with a steep learning curve. Before diving in, it’s crucial to understand that self-hosting requires technical knowledge and can be time-consuming. recommendations start with a purpose: Identify what you want to achieve through self-hosting (e.g., privacy, control) to stay motivated. start small and gradually scale: Don’t overwhelm you… this may help you to get that certificate issue sorted: > [@101: Network, domain and DNS](https://help.nextcloud.com/t/101-network-domain-and-dns/201882): > > Network requirements for self-hosting Nextcloud Network Assuming a network where the host running Nextcloud acquires a static local IPv4 address from DHCP/router and the required TCP ports 80 and 443 are enabled and internet facing for that IPv4 address, the routers public IPv4 address must be available via [DNS](https://en.wikipedia.org/wiki/Domain_Name_System) (Domain Name System) request. static local IPv4 address from DHCP/router internet facing TCP ports 80 and 443 for local IPv4 address DNS entry pointing to routers public IPv4 addre… see here about reverse proxies: > [@101: reverse proxy](https://help.nextcloud.com/t/101-reverse-proxy/194840): > > What is a reverse proxy and how to use it Security: HTTPS encryption (TLS offloading/TLS termination) some reverse proxies like traefik and Caddy could automatically enroll TLS cerificates (others like Apache and Nginx require additional software) filtering malicious traffic rate limiting Management Single Entry Point: The reverse proxy acts as a single entry point for all your web applications, simplifying administration and configuration. URL Rewriting: You can use the reverse proxy to r… ---
**Author:** ![system](https://help.nextcloud.com/user_avatar/help.nextcloud.com/system/32/29333_2.png) [@system](https://help.nextcloud.com/u/system)\ **Post date:** [October 26, 2025, 11:14am UTC](https://help.nextcloud.com/t/client-connection-issue/229422/5 "2025-10-26T11:14:12Z")
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