Please whitelist cPanel in your adblocker so that you’re able to see our version release promotions, thanks!

The Community Forums

Interact with an entire community of cPanel & WHM users!

remote dns restrictions details

Discussion in 'Bind/DNS/Nameserver' started by gogocode, Mar 12, 2015.

  1. gogocode

    gogocode Member

    Joined:
    Aug 28, 2004
    Messages:
    7
    Likes Received:
    0
    Trophy Points:
    151
    It used to be, that regardless of the config, in WHM you could always park a domain which had not (yet) had it's nameservers changed or added to ips.remotedns (the old "Sorry, the domain is already pointed to an IP address that does not appear to use DNS servers associated with this server." error).

    That does not appear to be the case so much any more, and it really is a pain for resellers who want to get a zone setup and ready before changing the NS.

    Anyway I have two questions which the cPanel/WHM team might be able to answer, and a suggestion.

    1. What is the rationale? We know that you can create an arbitrary DNS zone anyway simply by creating a new account in WHM before the NS is changed (or domain even exists). So what is the extra security problem in allowing creation of arbitrary parked domains in WHM over arbitrary account primary domains in WHM? I'm just curious to know.

    2. What is the actual criteria for "passing the test", do all the NS of the domain have to be known to the server, does just one have to be known, does it have to be the NS recorded in the whois data, or just what dig returns...?

    3. Wouldn't it be nice if you could add a special TXT record to the zone to allow this, in the same manner as various other services authenticate domain ownership.
    _cpanel_authentication TXT "[some server specified unique code]"
    then when parking the server could just check for this specific DNS record rather than necessitating screwing up the important stuff.
     
    #1 gogocode, Mar 12, 2015
  2. cPanelMichael

    cPanelMichael Technical Support Community Manager
    Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    45,435
    Likes Received:
    1,961
    Trophy Points:
    363
    cPanel Access Level:
    Root Administrator
    Twitter:
    Hello,

    The purpose of this restriction is to prevent users from adding domain names that do not belong to them to their account. The name server IP addresses must match IP addresses added in the /etc/ips files on the cPanel server. As for why it's a potential security issue, let's say a user adds xyz.tld to their account. That domain name is then automatically added to the /etc/localdomains file and thus Exim views it as a local domain name. This could allow the account to intercept emails intended for a remote mail server. The following options are available under the "Domains" tab in "WHM >> Tweak Settings" if you want to disable this security feature:

    "Allow Remote Domains"
    "Allow unregistered domains"

    Thank you.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #2 cPanelMichael, Mar 13, 2015
  3. gogocode

    gogocode Member

    Joined:
    Aug 28, 2004
    Messages:
    7
    Likes Received:
    0
    Trophy Points:
    151
    > This could allow the account to intercept emails intended for a remote mail server.

    Yes, but as already stated, this restriction is being applied in WHM (Allow Remote Domains = false did not previously prohibit the action in WHM).

    In cPanel yes it is an understandable and necessary restriction, but not in WHM.

    And it is perplexing especially as if you have access to WHM you can achieve the same (adding a domain to localdomains) by simply creating a new account with that domain name, an action which is not (so far as I recall) limited by this restriction.
     
    #3 gogocode, Mar 13, 2015
  4. cPanelMichael

    cPanelMichael Technical Support Community Manager
    Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    45,435
    Likes Received:
    1,961
    Trophy Points:
    363
    cPanel Access Level:
    Root Administrator
    Twitter:
    Could you verify which version of cPanel is installed on your system? EX:

    Code:
    cat /usr/local/cpanel/version
    I see that internal case number 95493 addresses this issue for cPanel version 11.42, and I can't reproduce this on cPanel version 11.48.

    Thank you.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #4 cPanelMichael, Mar 13, 2015
  5. gogocode

    gogocode Member

    Joined:
    Aug 28, 2004
    Messages:
    7
    Likes Received:
    0
    Trophy Points:
    151
    WHM says: 11.46.2 (build 4)

    So maybe this was fixed in .47 or .48?

    [​IMG]
     
    #5 gogocode, Mar 16, 2015
  6. cPanelMichael

    cPanelMichael Technical Support Community Manager
    Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    45,435
    Likes Received:
    1,961
    Trophy Points:
    363
    cPanel Access Level:
    Root Administrator
    Twitter:
    Hello,

    The change log shows the resolution was introduced in cPanel version 11.42.1.5. Is there anything in particular that is preventing you from upgrading to cPanel version 11.48 that we can help with?

    Thank you.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #6 cPanelMichael, Mar 17, 2015
(You must log in or sign up to post here.)
Loading...
Similar Threads - remote restrictions details
  1. behinam

    delay in sending email by remote smtp server

    behinam, Dec 3, 2018, in forum: E-mail Discussion
    Replies:
    1
    Views:
    290
    cPanelLauren
    Dec 5, 2018
  2. dcas

    Use remote mail server to send mail from PHP scripts

    dcas, Nov 27, 2018, in forum: E-mail Discussion
    Replies:
    1
    Views:
    189
    cPanelMichael
    Nov 27, 2018
  3. renatocandido10

    Remote user account Transfer

    renatocandido10, Nov 15, 2018, in forum: General Discussion
    Replies:
    1
    Views:
    62
    cPanelLauren
    Nov 15, 2018
  4. Karen Soto

    Remote User Account Transfer: Failed to extract the archive

    Karen Soto, Oct 31, 2018, in forum: General Discussion
    Replies:
    1
    Views:
    109
    cPanelLauren
    Nov 1, 2018
  5. Gino Viroli

    Allow Remote Domains - why is it a security problem?

    Gino Viroli, Oct 25, 2018, in forum: Bind/DNS/Nameserver
    Replies:
    2
    Views:
    303
    LucasRolff
    Oct 27, 2018

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Accept Learn More...
    Dismiss Notice