ClearFoundation Tracker - ClearOS
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0017551ClearOSapp-network - Network Settingspublic2017-10-18 12:312018-10-24 17:58
7.4.0 Beta 1 
7.5.0 Updates7.5.0 Updates 
0017551: Changing NIC subnet can leave DHCP Server invalid
If you configure a NIC as a DHCP server, then change the NIC subnet, it makes the DHCP server invalid but there is nothing to tell you this unless you go to the DHCP Server app.

In domestic routers, if you change the LAN subnet, from what I've seen, the DHCP server generally adjusts itself to the new subnet. ClearOS should do the same, or, at least take you straight to the DHCP server settings screen so you can fix the settings. As an extension of this, deleting an IP address or stopping the NIC from being Static should delete any DHCP server settings for the NIC or take you to the DHCP server screen.

This caused in issue in this this forum thread: [^]
Configure NIC as static
Configure NIC DHCP server
Change NIC subnet
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Issue History
2017-10-18 12:31NickHNew Issue
2017-10-18 12:40user2Severityminor => feature
2017-10-18 12:40user2Statusnew => confirmed
2018-10-03 07:38user2Target Version => 7.5.0
2018-10-09 21:43user2Target Version7.5.0 => 7.5.0 Updates
2018-10-09 21:44user2Note Added: 0008141
2018-10-09 21:44user2Statusconfirmed => resolved
2018-10-09 21:44user2Fixed in Version => 7.5.0 Updates
2018-10-09 21:44user2Resolutionopen => fixed
2018-10-09 21:44user2Assigned To => user2
2018-10-24 17:58user2Statusresolved => closed

2018-10-09 21:44   
Instead of getting marked as "invalid" in the UI, the subnet will be deleted.