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RV042 -am I ready for DNSSEC changes on 5/5/10?

nigelmarrion
Level 1
Level 1

I stumbled across this article about changes in DNS resolution that are effective on 5/5/10 here: http://www.theregister.co.uk/2010/04/13/dnssec/

I then the java tool found on this website here: http://labs.ripe.net/content/testing-your-resolver-dns-reply-size-issues

Sure enough the test fails for me with this error:

"Your resolver was only able to get packets SMALLER than 512 bytes"

The recommended action is adjust my hardware firewall to allow large UDP packets through. My RV042 is my hardware firewall and I cannot see where/how to do that.

Can anyone help please?

3 Replies 3

Glenn Quesenberry
Cisco Employee
Cisco Employee

Do you have the MTU size set to 512?  You can adjust this value in the "Firewall" settings such as identified in the attached graphic.

No. The MTU is set to Auto.

I do not have the MTU option as you had in the screen shot.

I am on the current firmware 1.3.12.19 and I am using both WAN's. Both are set to auto (setup/network).

If you have an option in your GUI to set the MTU higher, try setting it to a larger value, say "1500" and see if that makes any difference for you.