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Aruba Instant On AP22 DNS issue

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  • 1.  Aruba Instant On AP22 DNS issue

    Posted Jun 30, 2022 10:49 AM

    I just bought an AP22 for the sake of playing with it/testing it - and have a second on the way since I'm going to make them my home network at least for awhile after initial impressions. It is on the latest firmware, 2.6.0.

    I have one issue though that's pretty noteworthy - I have two Raspberry Pi's running stubby that are the DNS server my router's DHCP server (a TP-Link ER605) gives out - and it will not connect to the cloud controller with these set as DNS. I tried a static IP configuration with the same DNS servers and they also didn't work. I also tried a config with 8.8.8.8 and this too didn't work. I can work around this with a static IP pointing at my router for DNS and DNS enabled on it (which I think is dnsmasq).

    But for some reason, the Aruba AP won't use stubby - or even Google public DNS directly. There seems to be some compatibility issue here. I am glad I first set up the AP22 when I was re-imaging Pi's as well so was using the router's DNS as a backup, or I'd still probably be pulling my hair out :)



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    Allie

    Pronouns: she/her or ze/zir
    GitHub: @GalaxyAllie
    All opinions my own :)
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  • 2.  RE: Aruba Instant On AP22 DNS issue

    EMPLOYEE
    Posted Jun 30, 2022 02:12 PM
    I don't have much experience with InstantON, but is there any way you can do a packet capture of the dns conversation with stubby?

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    Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.

    HPE Design and Deploy Guides: https://community.arubanetworks.com/support/migrated-knowledge-base?attachments=&communitykey=dcc83c62-1a3a-4dd8-94dc-92968ea6fff1&pageindex=0&pagesize=12&search=&sort=most_recent&viewtype=card
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  • 3.  RE: Aruba Instant On AP22 DNS issue

    Posted Jun 30, 2022 08:08 PM
    Hi cjoseph,

    Thanks! - I've figured out what was going on with stubby. I was encountering getdnsapi/getdns issues #495, and compiling the latest from source to implement name compression fixed this for the Aruba InstantOn cloud controller and another site I found had failed (a Korean ticket site a guest wanted to connect to specifically).

    I still don't know why 8.8.8.8 failed directly - I thought this would be a very reliable test to prove it wasn't me, as it a widely-used DNS resolver (and said Korean site worked fine with it) - and probably merits further investigation on the Aruba side. I also apologize for the wrong place for this post - I only saw today there's a separate dedicated Instant On forum :)

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    Allie

    Pronouns: she/her or ze/zir
    GitHub: @GalaxyAllie
    All opinions my own :)
    ------------------------------



  • 4.  RE: Aruba Instant On AP22 DNS issue

    EMPLOYEE
    Posted Jun 30, 2022 09:06 PM
    This will definitely help someone else in the future.

    ------------------------------
    Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.

    HPE Design and Deploy Guides: https://community.arubanetworks.com/support/migrated-knowledge-base?attachments=&communitykey=dcc83c62-1a3a-4dd8-94dc-92968ea6fff1&pageindex=0&pagesize=12&search=&sort=most_recent&viewtype=card
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