RB450G and "..could not get answer from dns server"

RouterOS Beginner Basics
1

Hi all.
I have problem with my first MikroTik device and hope on your help.

Device:

[admin@MikroTik] > /syst resource print
                   uptime: 18m
                  version: 5.8
              free-memory: 244476KiB
             total-memory: 257120KiB
                      cpu: MIPS 24Kc V7.4
                cpu-count: 1
            cpu-frequency: 680MHz
                 cpu-load: 1%
           free-hdd-space: 483400KiB
          total-hdd-space: 520192KiB
  write-sect-since-reboot: 147
         write-sect-total: 37774
               bad-blocks: 0.1%
        architecture-name: mipsbe
               board-name: RB450G
                 platform: MikroTik

[admin@MikroTik] > /syst routerboard print
       routerboard: yes
             model: 450G
  current-firmware: 2.36
  upgrade-firmware: 2.37

Try connect to my ISP:

[admin@MikroTik] > /ip dhcp-client print detail
Flags: X - disabled, I - invalid 
 0   ;;; default configuration
     interface=ether1-gateway ipv4=yes add-default-route=yes default-route-distance=2 use-peer-dns=yes use-peer-ntp=yes 
     status=bound address=10.42.74.207/21 dhcp-server=83.102.172.86 primary-dns=213.234.192.8 secondary-dns=85.21.192.3 
     expires-after=6d23h57m1s v6-status=stopped 
[admin@MikroTik] > /ip dns set servers=213.234.192.8,85.21.192.3 allow-remote-requests=yes
[admin@MikroTik] > :ping www.google.com
while resolving ip-address: could not get answer from dns server

Other device(asus wl500gP) connecting to ISP without problems. What I can do with - “..while resolving ip-address: could not get answer from dns server”? Version 5.7 dont remove problem.
If this problem has been solved earlier, then link pls.

2

hi, try:

/ip dns set max-udp-packet-size=19999 cache-size=10240
3

I do and reboot. But dont work - “..while resolving ip-address..” again.

4

can you ping those ip addresses?

5

Can you ping the primary dns server?

:ping 213.234.192.8

Edit: I see jtroybailey beat me to it!

6

Do you think about routing?
I cant

[admin@MikroTik] > ping 213.234.192.8
HOST                                     SIZE TTL TIME  STATUS                                                                                    
                                                        no route to host                                                                          
                                                        no route to host

I tape

[admin@MikroTik] > /ip route print detail
Flags: X - disabled, A - active, D - dynamic, C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme, 
B - blackhole, U - unreachable, P - prohibit 
 0 ADS  dst-address=10.0.0.0/8 gateway=10.42.72.1 gateway-status=10.42.72.1 reachable ether1-gateway distance=2 scope=30 target-scope=10 
        vrf-interface=ether1-gateway

and

/ip route
add comment="vpn servers subnet" dst-address=213.234.192.0/24 gateway=10.42.72.1

This correctly I hope.

atm I can ping 213.234.192.8

[admin@MikroTik] > ping 213.234.192.8
HOST                                     SIZE TTL TIME  STATUS                                                                                    
213.234.192.8                              56 249 17ms 
213.234.192.8                              56 249 12ms 
213.234.192.8                              56 249 11ms 
213.234.192.8                              56 249 14ms 
213.234.192.8                              56 249 11ms 
    sent=5 received=5 packet-loss=0% min-rtt=11ms avg-rtt=13ms max-rtt=17ms

google.com - “..no route to host”

[admin@MikroTik] > ping www.google.com
HOST                                     SIZE TTL TIME  STATUS                                                                                    
                                                        no route to host                                                                          
                                                        no route to host

Tnx mates. :slight_smile: This 1st step from dead point - “could not get answer from dns server”

7

I do not see a default route. It would be the route with “dst-address=0.0.0.0/0”.