Question:
DNS Server not reachable.?
2009-11-16 20:28:04 UTC
Here are the details. Im running 2 dns server:
Server1 = ns.cartouch.org.uk ip = ending.241
Server2 = ns2.cartouche.org.uk ip = ending.242

server 1 primary domain is:
cartouche.org.uk

server 2 contains 4 primary domains
cartouchehosting.com
timespaceanddrums.com
timespaceanddrums.co.uk
timespaceanddrums.org.uk

Now Server 1 is reachable, ie i can visit cartouche.org.uk from my laptop.
Server 2 isnt reachable. However i can reach timespaceanddrums.org.uk

I created the three timespaceanddrums domains using the exact same settings.

Out of the 4 domains only timespaceanddrums.org.uk is reachable.

................................
PING TEST

IP ending.241 TIMES OUT

IP ending.242 is PINGABLE? (go figure, as this is the problem server)

ns.cartouche.org.uk and ns2.cartouche.org.uk BOTH HOSTS are not found

cartouche.org.uk TIMES OUT
cartouchehosting.com NOT FOUND
timespacceanddrums.com NOT FOUND
timespaceanddrums.co.uk NOT FOUND
timespaceanddrums.org.uk PINGS

................................

TCP/IP config

Both machines are set to above IP configuration and dns server 127.0.0.1
ie to use simple dns instead of windows dns client service.

Ive tried using real ip instead of 127.0.0.1
subnet and gateway are set correctly too.

Ive tried using 127.0.0.1 as prrefered and real ip as alternate where actually it should be:
server 1 ip as alternate for server 2 and vise versa.
....................................

Server 1 acts as primary for cartouche.org.uk and secondary for cartouchehosting.com
and vise versa.

As far as i can tell everything is fine within the LAN but those unreachable are unreachable
from anyother network including the wireless network. (my laptop)

Nothing works. Ive tried everything.

...................................
ANY HELP (clear and understandable, as im a novice) Would be appreciated. Thanks.

To NOTE: port 53 tcp and udp are open on both machines.?
Six answers:
heckart
2016-12-15 17:04:39 UTC
Dns Server Not Reachable
miha49
2009-11-16 20:42:34 UTC
I don't know what you mean by 127.0.0.1 as being simple dns instead of windows dns client service. That is the pointer to "self" in TCP/IP. Where do you think it is supposed to be going? Try setting it up without the 127 address. Unreachable usually means there is a gateway issue or subnet routing issue.
2009-11-16 20:40:19 UTC
well for one thing your computer isnt even using a internet ip address which is used to find a DNS server. "127.0.0.1" is a local ip address meaning its only good for networking to other computers and such.



what you need to do is call your ISP (Internet Service Provider) and talk to them about a Static IP Address. ( just call and ask im having trouble with my internet i think i have a static IP address.)



a static IP Address is a manually added IP address, which you will only work with one.



the other is a Dynamic IP Address which finds things like DNS automatically.



you most likely have a static ip address which is why your computer is looking for a DNS. it doesnt have the ip allowed to access the internet.
2016-12-14 16:51:59 UTC
a million. as quickly as you have a dial-up connection, your IP will replace each and every and every time you dial up on your ISP. 2. as quickly as you have cable cyber preparation superhighway, your IP will stay consistent for long education of time, as properly the actuality that it may replace each and every and each so frequently. 3. as quickly as you're on a community that makes use of DHCP, your computing gadget will frequently take care of its IP shelter, different than you change off the computing gadget and restart the router. then you definately honestly will settle for the 1st IP shelter which will replace into available to you. 4. as quickly as you're on a community that assigns IP addresses, you will continuously have an identical IP shelter, different than this is replaced manually.
RA
2009-11-16 22:28:35 UTC
I can reach Server2 = ns2.cartouche.org.uk ip = ending.242 via ping and HTTP (to IP address) but not Server 1 = ending.241 (no response). This is the opposite of your description (you say you can reach Server 1 but not Server 2).



Through other tests, I figured out the following:

1. Your ns.cartouche.org.uk server does not respond at all.

2. Your ns2.cartouche.org.uk server does not respond to DNS requests with a server name. Hence, the client cannot verify it is talking to the correct server and the request fails (at least partially).



Below are results of some of my queries that may help you isolate the problems. Securing and maintaining DNS servers isn't easy. My choice was to farm it out to www.DNSmadeEasy.com (who provides secure, redundant servers that reside on major backbones and update other servers extremely quickly for very little money). Two reasons why I outsource DNS services is 100% availability guarantee with (not just five 9s) and off-site management in case of catastrophes or DDoS attacks (you can redirect the IP addresses to servers on another site -- even if they just say "server maintenance - please come back later").



nslookup to the DNS server of my local ISP gives the following results:



>nslookup cartouche.org.uk

Non-authoritative answer:

Name: cartouche.org.uk

Address: 81.131.71.241



>nslookup ns2.cartouche.org.uk

Non-authoritative answer:

Name: ns2.cartouche.org.uk

Address: 81.131.71.242



>nslookup ns.cartouche.org.uk

*** [My ISP's DNS server] can't find ns.cartouche.org.uk: Non-existent domain



Because cartouche.org.uk resolves but ns.cartouche.org.uk doesn't, I would guess ns.cartouche.org.uk is undefined in your DNS table (i.e. no entry for host "ns").



These results are also peculiar:



>nslookup www.cartouche.org.uk

Non-authoritative answer:

Name: cartouche.org.uk

Address: 81.131.71.241

Aliases: www.cartouche.org.uk



HTTP to www.cartouche.org.uk works but HTTP to IP address does not. This could be a peculiarity of the Abyss web server you're using or possibly some port forwarding happening somewhere.



However, FTP requests ftp.cartouche.org.uk and 241 both give a login prompt.



>nslookup cartouchehosting.com ns2.cartouche.org.

uk

*** Can't find server address for 'ns2.cartouche.org.uk':

Non-authoritative answer:

Name: cartouchehosting.com

Address: 81.131.71.242





>nslookup cartouchehosting.com 81.131.71.242

*** Can't find server name for address 81.131.71.242: Non-existent domain

Server: UnKnown

Address: 81.131.71.242

Name: cartouchehosting.com

Address: 81.131.71.242



----------------------------------------------------------------------------------------------------------------

A free DNS test on http://www.infoblox.com/services/dns_advisor.cfm (I gave a fake e-mail address) gives the following results fr DNS configuration:



Test Summary



TOTAL TESTS COMPLETED = 69

Severe problem = 20

Serious problem = 6

Potential problem = 14

Configured correctly = 29



Details (this list is truncated, it's better if you perform the test yourself):



Lookup SOA for zone cartouche.org.uk has an SOA record, proceeding...

Lookup NS RRs at parent Found: ns2.cartouche.org.uk., ns.cartouche.org.uk.

Check >1 NS RR 2 NS records found: ns2.cartouche.org.uk., ns.cartouche.org.uk.

Check NS RRs are valid names ns.cartouche.org.uk. is a valid name

Check NS RRs are valid names ns2.cartouche.org.uk. is a valid name

Lookup NS RRs at auth. name servers ns.cartouche.org.uk. returned: no nameservers

Lookup NS RRs at auth. name servers ns2.cartouche.org.uk. returned: no nameservers



Check >1 NS RR ns.cartouche.org.uk. returned: query timed out

Check >1 NS RR ns2.cartouche.org.uk. returned: query timed out

Check NS RRs are valid names ns.cartouche.org.uk. is a valid name

Check NS RRs are valid names ns2.cartouche.org.uk. is a valid name



Compare auth and parent NS RR sets ns.cartouche.org.uk. returned: query timed out

Compare auth and parent NS RR sets ns2.cartouche.org.uk. returned: query timed out



Lookup A RRs for NS names Query for ns.cartouche.org.uk. returned: NXDOMAIN

Lookup A RRs for NS names Query for ns2.cartouche.org.uk. returned: NXDOMAIN



Check for matching glue records ns.cartouche.org.uk. returned: query timed out

Check for matching glue records ns2.cartouche.org.uk. returned: query timed out



Check NS addresses on >1 network 0 nameserver A records found



Check for CNAMEs Query for ns.cartouche.org.uk. returned: NXDOMAIN

Check for CNAMEs Query for ns2.cartouche.org.uk. returned: NXDOMAIN



Check NS address PTR matches NS name ns.cartouche.org.uk. NS addresses do not have matching PTRs

Check NS address PTR matches NS name ns2.cartouche.org.uk. NS addresses do not have matching PTRs



Fingerprint nameserver ns.cartouche.org.uk. is

Fingerprint nameserver ns2.cartouche.org.uk. is



Check fingerprint for vulnerable version

Check fingerprint for vulnerable version



Send VERSION.BIND query ns.cartouche.org.uk. returned: query timed out

Send VERSION.BIND query ns2.cartouche.org.uk. returned: query timed out



Send SOA query ns.cartouche.org.uk. returned: query timed out

Send SOA query ns2.cartouche.org.uk. returned: query timed out



Measure response time ns.cartouche.org.uk. SOA query was not successful

Measure response time ns2.cartouche.org.uk. SOA query was not successful



Check for AA bit ns.cartouche.org.uk. returned: query timed out

Check for AA bit ns2.cartouche.org.uk. returned: query timed out



Compare all SOA MNAME fields No SOA records found

Compare all SOA RNAME fields No SOA records found

Compare all SOA SERIAL fields No SOA records found

Compare all SOA REFRESH fields No SOA records found

Compare all SOA RETRY fields No SOA records found

Compare all SOA EXPIRE numbers No SOA records found

Compare all SOA NEGTTL numbers No SOA records found



Examine SOA refresh SOA refresh is 86400

Examine SOA retry SOA retry/refresh ratio is 0.04



Examine SOA e
tbshmkr
2009-11-16 20:46:16 UTC
Use OpenDNS.

=

208.67.222.222

208.67.220.220


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