Samsung M2026W printer - capsman - 4 way handshake failure

RouterOS Beginner Basics
1

I have a Samsung M2026W printer that used to work fine on my old router before update to Mikrotik

I have one HP AC2 as my main router and then two HAP AC lite hanging off in a Capsman config.

I cannot get the wireless printer to register on the network.

16:25:04 caps,info 84:25:19:31:34:6F@wlan-downstairs-cap-2ghz connected, signal strength -56 
16:25:04 caps,info 84:25:19:31:34:6F@wlan-downstairs-cap-2ghz disconnected, 4-way handshake failure 
16:25:05 caps,info 84:25:19:31:34:6F@wlan-downstairs-cap-2ghz connected, signal strength -62 
16:25:05 caps,info 84:25:19:31:34:6F@wlan-downstairs-cap-2ghz disconnected, 4-way handshake failure 
16:25:07 caps,info 84:25:19:31:34:6F@wlan-downstairs-cap-2ghz connected, signal strength -60 
16:25:07 caps,info 84:25:19:31:34:6F@wlan-downstairs-cap-2ghz disconnected, 4-way handshake failure

I tried all sorts.

Removed access lists (ie dont drop weak signals)
disabled all firewall rules
made various changes to the security of my capsman… adding/removing encryption and connection types
added and removed b/g/n network settings.

I’m at a loss really now. What constitutes a ‘4-way handshake failure’?

Any help or suggestions would be very much appreciated.

Thanks.

2

To add, all three devices are at the latest stable; 6.45.7

3

Its because of the security configuration used.
Maybe the device does not support newer encryption algorithms…
What is the encryption you use ?

4

Thank you for replying, think I might have sorted it.

I had both aes ccm and tkip set for both encryption and group encryption.

No matter what combination I set it always seemed to fail.
So I decided to totally remove encryption options which left the SSID ‘open’.
But this allowed the registration to complete ok.

Now the printer has a DHCP IP i’ve put aes ccm encryption back on and its seems ok.

Will monitor.

Thanks again… your hint really helped.

5

I ve seen that too with older devices… no matter what encryption you choose or what combination you make, every time it simply fails…