Dns-relay works for resolving 1 server name, not the other

[ATI]

Hi
I have 2 servers, using DHCP to acquire their IP.
brooklyn: 10.17.10.30 and fiinas: 10.17.10.34

From my laptop, I can ping the nas using its name.

C:\Users\Alex>ping fiinas
Pinging fiinas [10.17.10.34] with 32 bytes of data:
Reply from 10.17.10.34: bytes=32 time<1ms TTL=64
Reply from 10.17.10.34: bytes=32 time<1ms TTL=64

But I can't resolve name on the second one:

C:\Users\Alex>ping brooklyn
Ping request could not find host brooklyn. Please check the name and try again.

both are using DHCP but if I check on pfSense DHCP lease status, fiinas is offline while brooklyn is online:

10.17.10.30  	00:0c:06:09:f3:eb  	brooklyn  	n/a   	n/a   	online  	static 
10.17.10.34  	00:08:96:0d:09:13  	FIINAS  	n/a   	n/a   	offline  	static 

PS: I can ping the ip address directly of brooklyn though

C:\Users\Alex>ping 10.17.10.30
Pinging 10.17.10.30 with 32 bytes of data:
Reply from 10.17.10.30: bytes=32 time=1ms TTL=64
Reply from 10.17.10.30: bytes=32 time<1ms TTL=64

Do you have any idea why the DNS-relay doesn't work for brooklyn ?

Thanks

[ATI]

Also, in the Diagnostics: DNS Lookup page, I have these results:

Hostname or IP : fiinas	
	= 10.17.10.34
Create alias out of these entries. 

Hostname or IP 	: brooklyn
	= 10.17.10.30
Create alias out of these entries. 

I clicked on create an alias for both, and got this:
fiinas: an alias already exist
brooklyn: Alias created with name brooklyn

but it did not change resolve issue.

I then checked in /etc/hosts and see that brooklyn in in lowercase, while fiinas is in uppercase.
10.17.10.30 brooklyn.fii brooklyn
10.17.10.34 FIINAS.fii FIINAS

I changed it to uper case, but did not help…

I don't understand why it works for one, and not the other... (during my tests I regularly renew my laptop dhcp lease, and the server ones too, to refresh settings)

[jimp]

The client you're pinging/resolving from - is it actually using pfSense as its DNS server?

If it resolves from Diag > DNS, then it would from clients using pfSense as their DNS server. If it's using some other DNS server, it may be finding fiinas by NBNS and not DNS.