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ⓘ Treat Linux active virtual interfaces as secondary IP addresses instead of independent links, fixing alias parsing, hiding invalid status controls, rejecting down-state creation, and removing existing aliases with ip addr del when needed. Reproduce path: Example repro before this fix: 1. Go to **Network Configuration → Network Interfaces → Active Now**. 2. Click **Add a new interface**. 3. Enter: ```text Name: enp0s5:1 IPv4 address: 10.211.55.21 Netmask: 255.255.255.0 Status: Down ``` 4. Click **Create**. Before the fix, Webmin could still create the alias or handle it inconsistently, because `enp0s5:1` is not a real link that can be “down”. It is just an extra IP address on `enp0s5`. Expected after the fix: - The UI should not offer `Status` for active virtual aliases. - If someone submits `up=0` manually anyway, Webmin rejects it with: `Virtual interfaces cannot be created with down status` - If an existing active virtual alias is saved as down through lower-level code, Webmin removes the IP using something like: ```bash ip addr del 10.211.55.21/24 dev enp0s5 ```
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Webmin is a web-based system administration tool for Unix-like servers, and services with about 1,000,000 yearly installations worldwide. Using it, it is possible to configure operating system internals, such as users, disk quotas, services or configuration files, as well as modify, and control open-source apps, such as BIND DNS Server, Apache HTTP Server, PHP, MySQL, and many more.
Usability can be expanded by installing modules, which can be custom made. Aside from this, there are two other major projects that extend its functionality:
- Virtualmin is a powerful, flexible, most popular, and most comprehensive web-hosting control panel for Linux, and BSD systems, with over 150,000 installations worldwide. It is available in an open-source community-supported version, and a more feature-filled version with premium support;
- Usermin presents and controls a subset of user-centred features, rather than administrator-level tasks.
Webmin includes 116 standard modules, and there are at least as many third-party modules.
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Webmin is released under the BSD License.