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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 vl...
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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