I have a network printer with a static IP address. Recently I've changed my subnet and had to allocate it a new static IP address.
I've tried to update CUPS with the new IP address by going to Printers -> [Printer name] -> Administration -> Modify printer -> Current connection -> Continue. I'm presented with this screen but the connection string is not an editable box, so I can't change the IP address:
How can I modify the IP address?
You can edit /etc/cups/printers.conf
In a terminal:
sudo systemctl stop cups
sudo vi /etc/cups/printers.conf - (or the text editor of your choice, I chose vi.)
locate the printer's URI (in bold below), it will be among all of your printers' profiles, they are arranged within tags like:
<Printer My Poop Laser Printer>
PrinterId 1
UUID urn:uuid:c41ca0c7-52f3-3448-5dfe-11281fc3ac2e
AuthInfoRequired none
Info
Location
MakeModel Generic IPP Everywhere Printer
DeviceURI ipp://192.168.200.2/printers/laser
State Idle
.
.
</Printer>
You can edit the IP there, save it.
And then restart cups...
sudo systemctl restart cups
I've never had much joy from the CUPS web interface.
You can change the printer URL here, at least if your setup is similar to mine.
Preferences/Printers, right click and choose Properties
The IP address is not a modifiable field, because, if you changed it, it would describe a different printer.
Abandon the "Modify Printer" approach, and on http://localhost:631/admin, Find New Printer
I just went through the same exercise when my subnet changed. You can modify the connection. However, you will not be able to select current connection. You have to select a "new" connection, i.e., LPD or AppSocket or, for you, ipp. As your original/current connection is ipp, chose Internet protocol printing (ipp). Hit continue and fill out details the as current connection.
As root in a terminal window do, for example:
lpadmin -p HL2270DW -v http://192.168.1.102:631
Of course, substitute your own printer's name after -p. You don't have to do anything within the CUPS interface.
