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Curiosity

join:2001-10-01
Dawson Creek, BC

reply to redrebel

Re: Kerio Personall Firewall v2.1.5 & KB951748? Kerio forum?

said by redrebel:

I'm one of the minority that still uses KPF v2.1.5 (desktop and laptop) and yes when I installed the dreaded KB951748 it knocked out IE and Firefox for me. Looking at my logs it was using highports for DNS resolution. I had it specifically set to only use the range of 1024-5000. Made the change to allow highports (1024-65535) and it works fine (desktop only).
Why is changing the local port range going to make DNS more secure? What is the idea behind that?


NetFixer
Freedom is NOT free
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join:2004-06-24
Murfreesboro, TN
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said by Curiosity:

Why is changing the local port range going to make DNS more secure? What is the idea behind that?
Try doing a Google or Yahoo! search for DNS spoofing and you will find a lot of answers to your question. Here is a sample link from such a search, I hope some of the results you get will match your technical knowledge level, since I don't know exactly how high or low to shoot.

From SANS Internet Storm Center: Multiple Vendors DNS Spoofing Vulnerability
--
We can never have enough of nature.
We need to witness our own limits transgressed, and some life pasturing freely where we never wander.
Test your firewall.

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