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Sunkwan_Kim_147
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Feb 04, 2015

New connection and Active connection

hi all.

 

I've deployed the DNS.

 

the new connection graph displays 30k connections.

 

and In the fastL4 profile, timeout value is 1s for udp dns query.

 

But, the active connection graph disaplys 80k connections.

 

I think the active connection should be 60k.

 

how do i understand it ?

 

1 Reply

  • Hi,

     

    for DNS via UDP I would recommend to use a dedicated virtual server in mode standard configured on port 53 for UDP protocol with a pre-defined "udp_gtm_dns" profile assigned.

     

    This specific profile has the "Datagram LB" option enabled and a 5 seconds timeout. It will delete the connection table entry right after the servers response.

     

    Perhaps you may want to create a second virtual server to handle DNS via TCP as well using the same IP in mode "Performance (Layer 4)" with to handle TCP port 53 with a fastL4 profile.

     

    In case you got the DNS services add-on module or run a LTM/GTM combo, both virtual servers may run in mode "standard" and use a DNS profile allowing you to provide DNS protocol proxy capabilities by your virtual server.

     

    Thanks, Stephan Thanks, Stephan