Hej, check this settings ...
Firewall->NAT->Port Forward: Rule
Interface: LAN
TCP/IP Version: IPv4
Protocol: TCP/UDP
Source/Invert: unchecked
Source: any
Source Port Range: from: any, to: any
Destination/Invert: Checked
Destination: LAN address
Destination Port Range: from: DNS, to: DNS
Redirect Target IP: Single host or Network -> 192.168.1.5
Redirect Target Port: DNS
NAT Reflection: disable
Firewall->NAT->Port Forward: Rule
Interface: LAN
TCP/IP Version: IPv4
Protocol: TCP/UDP
Source/Invert: unchecked
Source: any
Source Port Range: from: any, to: any
Destination/Invert: Checked
Destination: LAN address
Destination Port Range: from: DNS, to: DNS
Redirect Target IP: Single host or Network -> 192.168.1.5
Redirect Target Port: DNS
NAT Reflection: disable
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