dns is not working through internet

Submitted by elmarkivo on Tue, 08/25/2009 - 08:08

Hi, i recently installed echp and tested over mi lan network without any problem, so i try to put into the internet.
i'm from argentina, so i went to nic.ar, the page who manage the domain names , dns etc.
i register a dns for my ip address (1 dns per ip is allowed).
i register a test page and delegate the dns to the one i had register in first place and other at random.
i had all the necessary ports opened, like 53,80,21,443 etc.
i don't know how much time take to the dns of my server to translate the domains or how can i make them work.... right now, i had my domain in nic.ar with primary dns ns2.lancube.com.ar wich is pointing to my external ip address, but
i can't reach any web page or doing ping to the dns.
url www.alojarpaginas.com.ar
dns ns2.lancube.com.ar
i only can acces to some webpages in my ehcp server in wichs i am using as secondary dns one that works from a free dns server.

it has been no more than 20 hours since echp is online.

thanks in advance

Forums: 
Ehcp General, uncategorized yet

ehcpdeveloper

Wed, 08/26/2009 - 18:13

190.2.27.253
if this is your external ip, I tested, does not accept dns requests... Your port 53 seems closed.

This caused mainly by one of these:

  • port 53 closed on your router/modem or a firewall, or by your server/server's internal firewall.. check those
  • port 53 is not redirected (NAT'ed) from outside world to your inside server,
  • your server does not accept incoming dns (53) requests.. this may be only bind is not installed or bind not working. ehcp is installing bind by default, but, bind may not be started because of a failure.. To test, on your server, run: host google.com localhost

    • elmarkivo

    Thu, 08/27/2009 - 06:12

    hi i have checked all the things you said...
    i had a firewall router in ip 192.168.0.254 ...
    my firewall config in : http://www.lancube.com.ar/imagenes/dns-firewall.PNG
    my port forward config: http://www.lancube.com.ar/imagenes/dns-portForward.PNG
    -----
    bind in my server over putty: http://www.lancube.com.ar/imagenes/dns-bind.PNG
    -----

    i think those config are just fine, the only thing is ...
    "your server/server's internal firewall.. check those "
    my firewall/router is running on 192.168.0.254 ... what do you mean with your server/server's internal firewall??

    thanks a lot

    ehcpdeveloper

    Thu, 08/27/2009 - 19:09

    You have a problem at: http://www.lancube.com.ar/imagenes/dns-firewall.PNG
    According to that: you allow dns from internet to your server, but you do not allow from your server to outside world.
    This explains everything. Thats why you/your server can reach internet, but internet cannot reach you.
    Solution: the source column should be Any for both tcp,udp, port 53.

    your port forward config is ok.

    The last:
    "your server/server's internal firewall.. check those ": I mean, sometime, people install firewall on servers too... if you did not install, dont wory... but if you/somebody installed firewall on your server, you should enable ports on your server too.. to check, on another computer on your internal network, on command line:
    nmap yourserverip
    you should see something open..

    elmarkivo

    Tue, 09/01/2009 - 03:30

    from the internet if i use the host command i see this:

    ehcp:~# host alojarpaginas.com.ar
    alojarpaginas.com.ar.local.com has address 63.251.207.31

    if i use dig command i see this:

    ehcp:~# dig alojarpaginas.com.ar
    ; <<>> DiG 9.5.1-P3 <<>> alojarpaginas.com.ar
    ;; global options: printcmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 14927
    ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1
    ;; WARNING: recursion requested but not available

    ;; QUESTION SECTION:
    ;alojarpaginas.com.ar. IN A

    ;; ANSWER SECTION:
    alojarpaginas.com.ar. 86400 IN A 190.2.27.253

    ;; AUTHORITY SECTION:
    alojarpaginas.com.ar. 86400 IN NS ns.alojarpaginas.com.ar.

    ;; ADDITIONAL SECTION:
    ns.alojarpaginas.com.ar. 86400 IN A 190.2.27.253

    ;; Query time: 10 msec
    ;; SERVER: 190.2.27.253#53(190.2.27.253)
    ;; WHEN: Fri Aug 28 14:45:16 2009
    ;; MSG SIZE rcvd: 87

    the dig IP is showing is ok 190.2.27.253, but in the host command a local.com is added at the end of alojarpaginas.com.ar and the ip showed is from the host www.local.com ... what i am doin wrong?

    thanks

    ehcpdeveloper

    Tue, 09/01/2009 - 22:04

    did you fix http://www.lancube.com.ar/imagenes/dns-firewall.PNG ? to appear as any on both...

    elmarkivo

    Wed, 09/02/2009 - 14:17

    yes i have fixed, now is like this

    http://www.lancube.com.ar/imagenes/firewall.jpg
    and
    http://www.lancube.com.ar/imagenes/portFordward.JPG

    i don't understand why is redirecting to local.com ip ......

    thanks again for all the replies !