Ever since version 2.4 it has been somewhat difficult to change the logo of pfsense. The other problem is Netgate employees won’t allow you to discuss this on the official forums anymore and will lock your thread if you do.

After some digging and a little help from Vectron I came up with the following:

— edit — I have replaced the old manual method with system patches to make this change persistent through upgrades

Install the package “system patches” from the pfsense package manager. Navigate to System>Patches

Click Add New Patch and enter the following:

Description: header logo

URL/Commit ID: 

COPY PASTE LINK IN (URL / COMMIT ID)

Base Directory: /usr/local/www/

Auto Apply: checked

Click save and then click fetch for the header logo

Next click apply for the header logo

Lastly upload logobar.png to /usr/local/www/

Click Add New Patch and enter the following:

Description: login logo

URL/Commit ID:  COPY PASTE LINK IN ID

Base Directory: /etc/inc/

Auto Apply: checked

Click save and then click fetch for the header logo

Next click apply for the header logo

Lastly upload logo.png to /usr/local/www/

Do note that you might have to still re-upload your logos after version upgrades and they definitely won’t stick around if you restore a config backup xml to a fresh install.