I have some Ricoh Aficio SP C430DN printers on our network that we cannot access the web gui in google chrome. We get an error about a Weak DH key when we visit the https web management page. We have http turned off so https is the only way to go. My Firefox seemed to be able to access it though.

I found a thread on spiceworks forums about this and they suggest a firmware update. I went to Ricoh's site and I found plenty of drivers for various operating systems, but not a link to the firmware. Here's a cut and paste from some of the device info tab:

System : 1.05
NIB : 9.60
Web Image Monitor : 1.02
Printer Language
Automatic Language Switching : 55.00
Customized PJL : 55.00
Adobe PostScript 3 : 1.02
Adobe PDF : 1.02
RPCS : 3.10.10
PCL 5c Emulation : 1.03
PCL XL Emulation : 1.03