For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

T0nyP's avatar
T0nyP
Icon for Cirrus rankCirrus
Apr 01, 2022

F5 DNS what specific TCP/UDP port need to open?

Hi F5 Community,

We are restricting thru Port Lockdown our F5 DNS system which is facing Internet.

Does UDP/53 and TCP/4353 already enough?

Or we still need to open both TCP/UDP 53 and TCP/UDP 4353?

Thanks,

Tony

application delivery
dns

1 Reply

  • T-Trust's avatar
    T-Trust
    Icon for Cirrostratus rankCirrostratus
    Apr 02, 2022

    Hi

    So i think if you would like to enable about security DNS or zone transfer, You have to open TCP 53 and TCP 4353 for protocol IQUERY

     

    Thanks you