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smp_86112's avatar
smp_86112
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Dec 02, 2009

LTM Returns "Refused" DNS Response

Hi. I've got a DNS server in a VLAN routed by a 9.3.1HF6 LTM. Queries are sent to the DNS server through a 0.0.0.0:* wildcard virtual server. Pretty frequently (as in every 30-60 seconds) I get a DNS ...
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smp_86112's avatar
smp_86112
Icon for Cirrostratus rankCirrostratus
Dec 03, 2009
I appreciate you following up, as I don't like leaving this problem unresolved.

 

 

I am a little concerned with your use of the term "Pool Member" here, as there is no "Pool" based on the way I think about Pools. That may just be semantics, but I want to ensure that I stated the problem correctly.

 

 

I'm not entirely sure what you mean by "making sure it is bound to all the VLANs I expect". If I'm not mistaken, the DNS request is being forwarded through this virtual. According to the GUI, the "VLAN Traffic" property of this VIP is set to "All VLANs". There are only two vlans on this LTM - an external and internal.

 

 

 

virtual vs_0_0_0_0_any {

 

destination any:any

 

ip forward

 

profile fastl4_vs_0_0_0_0_any

 

}

 

 

 

The test clients are not in the same VLAN as the "Pool Member". However the DNS server is listed in the "DNS Lookup Server List" (under "General Properties" -> "Device" -> "DNS" in the admin GUI). I wonder if this is the conflict???