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Thread: DNS Question

  1. #1
    Untangler
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    Default DNS Question

    I have untangle setup behind my cable modem as a router with a hostname and a domain in the config section. I am using an actual registered domain but locally I can't seem to resolve or ping the name untangle host name

    Cable Modem --> Untangle Router --> Cisco 2960G gigabit switch --> Synology NAS & computers

    ping mydomain.com resolves to public IP
    ping gateway.mydomain.com can't find host

    I am using namecheap dynamic DNS to update the public IP for mydomain.com
    I also have a cname gateway.mydomain.com

    How do I properly setup untangle to resolve? Do I need to add a static entry into the local DNS setting?

    Thank You in advance for any help on this
    Last edited by Compstuff; 12-05-2016 at 06:54 AM.

  2. #2
    Untangler jcoffin's Avatar
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    Default

    Does this resolve?
    > host gateway.mydomain.com

    If it does, is the IP shown the same as the WAN of your Untangle?
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  3. #3
    Untangler
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    I was actually using a windows client ... should I ssh in and test that way?

  4. #4
    Untangler jcoffin's Avatar
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    Windows is nslookup gateway.mydomain.com

    Or on the Untangle

    Config -> Network -> Troubleshooting -> DNS test
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  5. #5
    Untangler
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    First... thanks for helping

    nslookup (masked my real info):

    C:\Users\6420>nslookup gateway.mydomain.com
    1.101.168.192.in-addr.arpa
    primary name server = localhost
    responsible mail addr = nobody.invalid
    serial = 1
    refresh = 600 (10 mins)
    retry = 1200 (20 mins)
    expire = 604800 (7 days)
    default TTL = 10800 (3 hours)
    Server: UnKnown
    Address: 192.168.101.1

    *** UnKnown can't find gateway.mydomain.com: Non-existent domain

    C:\Users\6420>nslookup mydomain.com
    Server: UnKnown
    Address: 192.168.101.1

    Non-authoritative answer:
    Name: mydomain.com
    Address: 11.22.333.44

    I also ran the HOST command in a SSH session and it resolves mydomain.com but not gateway.mydomain.com

  6. #6
    Untangler jcoffin's Avatar
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    Your nameserver is not responding to gateway.mydomain.com. Is namecheap or nameserver?
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  7. #7
    Untangler
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    This is so strange because no matter what tool I use nslookup, untangle DNS tool, host command in SSH the results confuse me...

    When I run a look on the host name of my computer "laptop1" it resolves with laptop1.mydomain.com and the correct IP that the DHCP is handing out

    When I run a look on the host name of my computer "mydomain.com" it resolves to the correct public IP

    When I run a look on the untangle host name of "gateway" it doesn't resolve

    NameCheap is where the domain is registered and where I have the DDNS setup. I have no other records just the dynamic A record as per another link I found on here

    I am really not liking NameCheap DDNS at all, in fact I am questioning if it is even working and their tech support is actually pretty horrible since they can't seem to tell me if its working or not.
    Last edited by Compstuff; 12-05-2016 at 08:59 AM.

  8. #8
    Untangler jcoffin's Avatar
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    The laptop name is coming from the Untangle as it registers the name on it's own DNS server since it is providing DHCP. The Untangle name gateway must be registered with your domain nameserver for the rest of the world to know the IP.
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  9. #9
    Newbie
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    I had this same problem with namecheap dynamicdns using subdomains, I ended up using their instructions to create a wildcard entry. "*" for host and your ip for value.

  10. #10
    Untangler
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    I had actually created the following record on namecheap
    A + Dynamic DNS Record @ and the IP

    And the following in untangle... should I change them both?

    ncddns.PNG

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