Problems accessing router with client side ip configuration

RouterOS Beginner Basics
1

Hello,

i’ve just configured a RB750r2 as rooter wit nat.
Everthing works fine, as long as Clients configured to use use DHCP server of router.

But when i configure a fix ip at client side (IP-Adress, Gatway), client is able to communicate, but is not able to access DNS Server.
This is very strange, because the manually configured ip is not in use and also outside of DHCP range.

I tried to also define explicit DNS Server at client side as 8.8.8.8 and also as the router ip gateway itself - which is also used when a client is using DHCP - but both has not helped.

Dose somene has an idea what is causing this strange beaviour and how to solve it ?
I can’t imagine, that there is a different between an ip adesss received by DHCP server and one manually configured at client side. So does someone out here has an explanation for this behaviour ?
I need to use a fixed ip adress for my NAS.

Here is my - quite simple - Firewall and routing configuration:
/ip firewall filter
add chain=forward connection-state=established
add chain=forward connection-state=related
add chain=forward src-address=192.168.81.0/24
add action=log chain=forward
add action=drop chain=forward
/ip firewall nat
add action=masquerade chain=srcnat out-interface=v_80_dtag
/ip route
add distance=1 gateway=192.168.2.1

2

check “ADD ARP FOR LEASES” in dhcp server that is disabled.
check “ARP” in interface of bridge that is “enabled” and not “reply only”

3

thx fremannn,

unfortunately it dosen’t work.

check “ADD ARP FOR LEASES” in dhcp server that is disabled.<:
Was uncheck, i’ve checked it, but without result

check “ARP” in interface of bridge that is “enabled” and not “reply only”<
ARP attribute on eache interface used was alreas set to “enable” (due to default).
Just want to mention that i’m using hardware switching instead ob bridging to seperate VLAN’s.
For reference purpose just see http://forum.mikrotik.com/t/questions-to-cascaded-rooter-scenario-with-additional-vlan-switching/97511/1 for the complete solution.

I’ve just discoverd, that the manually configured ip adress on client side will occure on ARP List whe client is trying to do do dns lookup.

Anny further idea ?

4

What RouterOS version are you using?

5

i use the relatively new 6.35 version

6

Update to current version 6.35.4 has not solved problem

7

Without seeing the rest of your config and the config on the host itself, we simply don’t know. What you can do is allow the DHCP to assign an IP and then go in “right click” then select “make static.” This will ensure your host device gets the same IP every time.