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kjagus
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Hotspot - problem with DNS traffic on some client platforms

Sun May 29, 2005 11:52 am

Hi
I have problem with DNS client, when customer uses Planet XRT-401D router on hotspot interface. DNS is not resolved at all - neither builtin in hotspot or any other. The windows' "nslookup" is not resolving names either, even when connected directly and whole DNS resolution in system works well. I created static firewall NAT rule (accept external DNS without port redirection) and configured routers to use external specified DNS and it works... until MT is rebooted. After reboot - a dynamic hotspot rules are being created before static ones.
Windows boxes runs ok (except nslookup).
Any idea?
regards!
kj
 
nazemg
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nslookup in hotspot, not working for me too.

Mon May 30, 2005 11:45 pm

nslookup in hotspot, not working for me too.

Routeros ver 2.9rc4, ping and browsing work, nslookup does'nt.
I think there is also some slowness in browsing.
 
uldis
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Tue May 31, 2005 10:30 am

Please write to support@mikrotik.com with your routers configuration and also include the support output file which is made when the nslookup doesn't work.
 
Rex
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Same issue in 2.9RC7

Sat Jul 30, 2005 7:16 am

Temp solution =
Add your DNS to walled garden on port 53
 
kjagus
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Thu Aug 04, 2005 12:21 am

I confirm again - DNS responses are not translatet to 53 and MT sends responses from 64xxx port (I don't remember). Linux boxes or simply routers doesn't understand what's going on and ignores responses. I have never seen working nslookup in none of my networks even on windows boxes, where overall DNS resolution works! I have sniffer log and will send it to support.
 
kjagus
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Thu Aug 04, 2005 9:45 pm

IP 192.168.21.172.32769 > 192.203.230.10.domain: 944 A? download3.avast.com. (37)
- ok
IP 10.20.0.1.64872 > 192.168.21.172.1661: UDP, length 167
- request to public dns redirected to hotspot's dns. response becomes from hotspot's dns, but from wrong port and TO wrong port (I think) too
IP 192.168.21.172 > 10.20.0.1: icmp 203: 192.168.21.172 udp port 1661 unreachable
- of course...
 
sten
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Fri Aug 05, 2005 11:50 am

Add hostname for DNS' (RouterOS) IP address.
 
kjagus
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Sat Aug 06, 2005 3:13 pm

Add hostname for DNS' (RouterOS) IP address.
Did you mean:

/ip hotspot profile print
0 * name="default" hotspot-address=10.10.0.1 dns-name="MT-TEST"
html-directory=hotspot rate-limit="" http-proxy=0.0.0.0:0
smtp-server=0.0.0.0 login-by=mac,http-chap split-user-domain=no
use-radius=no


and

/ip dns static print
0 D MT-TEST 10.10.0.1 5m


or anything more?

Suddenly this was not helpful :(
regards
kj
 
sten
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Sat Aug 06, 2005 7:06 pm

uhm, i guess i am the only one running local dns cache.
because adding hostname is necessary for dns cache to work.
might not apply to you.
 
kjagus
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Sun Aug 07, 2005 1:36 am

I do use dns cache too and I didn't had configured these entries before your post. Did I configured everything, that you mean? I'll check once again, if was it helpfull, but today two customers called me with DNS problem again. I'll verify these calls on monday.
 
kjagus
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Tue Aug 09, 2005 5:43 pm

Not helped
DNS answers still from 64872
Sent to support week ago - no answer :(
 
kjagus
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Fri Aug 26, 2005 12:34 am

I found it! :P
Problem occours only sometimes, when using more then one IP address on hotspot interface (even then not always!). I disabled all additional addresses - DNS started to run ok - and then enabled them back - still runs ok. As I can see: "primary" IP addres (the one from neighbour viewer) has changed - now there is one from my hotspot IP pool, before this operation there was one from additional addresses not belonging to hotspot pool... works until reboot of course :roll:

kj

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