Benefits of using DNS Proxy?

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L4 Transporter

Benefits of using DNS Proxy?

Are there any Security benefits to using the current implementation of DNS proxy on the PAN? I have seen on the ver 6.0, a new feature called DNS sinkhole, but I don't think it will require the DNS proxy feature. Watchguard checks DNS headers and a couple of other criteria for DNS based attacks, but I don't see anything in PAN documentation that says the PAN Firewall does anything when used a DNS proxy.

Any thoughts?

The inherent vice of capitalism is the unequal sharing of blessings; the inherent virtue of socialism is the equal sharing of miseries.
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L6 Presenter

Cache, static entries, etc... But not the one like DNS sinkhole, it is different and it is a security feature..

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L7 Applicator

You are correct, the dns proxy feature is a performance feature and not a security feature.

Steve Puluka BSEET - IP Architect - DQE Communications (Metro Ethernet/ISP)
ACE PanOS 6; ACE PanOS 7; ASE 3.0; PSE 7.0 Foundations & Associate in Platform; Cyber Security; Data Center
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L4 Transporter

If FW is set up  DNS proxy configuration, fw needs to have U-Turn NAT configuration?

May I disable U-Turn NAT rules?

Thanks.

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L4 Transporter

U-turn - no, but You need policy like:

2014-02-05_120658.png

to allow DNS traffic

Regards

SLawek

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L6 Presenter

if you use fqdn you'll not need.bu if you'll access with ip, you will.

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L4 Transporter

Hello

the DNS sinkholing is not implemented by the DNS PROXY.

the DNS sinkholing is implemented by antispyware profile

regard's

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L3 Networker

I think it depends on your policy.  If you do not have a rule that dictates what the valid upstream resolvers are, the proxy could provide that same benefit.  It could also help with split dns issues.

Cheers,

Mike

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