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aaljadaa_299370's avatar
aaljadaa_299370
Icon for Nimbostratus rankNimbostratus
May 07, 2018

SPLIT-DNS for same Domain name

HI

 

I used to have internal GTM as well as external GTM, I end up with one GTM to resolve internal and external inquires. I have configured 2 listeners for internal and external with different vlan ID. I have defined a region including All internal IP address. No issues so far. I have re-created the internal entries on the unified external GTM, I have stuck with not being able to create the internal Wide ip because the external One is already there with same name and pointing to Public IP address!!!

 

Need help to have 2 wide ip addresses example (mailx.com), Same name with different pool members.

 

Thanks

 

application delivery
BIG-IP DNS

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  • Not_The_Good_Ke's avatar
    Not_The_Good_Ke
    Icon for Altocumulus rankAltocumulus
    May 07, 2018

    The way I resolved this issue myself was to create an internal and external wide IP for the same service, and point them to separate pools.

     

    For example with internal DNS, I have a subdomain pointed to the F5 DNS appliances - gslb.company.ca - and the same subdomain set up for the exteral DNS provider - gslb.company.ca.

     

    On the DNS appliances I set up two wide IPs - mail.int.gslb.company.ca for the internal DNS resolution and mail.ext.gslb.company.ca for the external DNS resolution.

     

    Internally in DNS I have a CNAME record that points mail.company.ca to mail.int.gslb.company.ca. Externally in DNS I have a CNAME record that points mail.company.ca to mail.ext.gslb.company.ca.

     

    There may be different way to set this up using topology records and such but this is a simple solution and works well for me.

     

    • aaljadaa_299370's avatar
      aaljadaa_299370
      Icon for Nimbostratus rankNimbostratus
      May 20, 2018

      Thanks alot for your reply, i have decided to merge internal & external in on box GTM, using different DNS is quite confusing..

       

      Thanks again