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Too many DNS requests for router
Name: jam14online Date: August 14, 2005 at 06:42:37 Pacific OS: NA CPU/Ram: NA
Comment:
I had a 3MB standard Apache access log file that I wanted to analyze. I use WebLog Expert, a Windows application, to do this.
I used the software a few months ago and had left "DNS resolution" turned on. As far as I can remember, this had not caused me problems.
However, when I set the software off analyzing my log today, the number of DNS requests (11384 in total) seemed too much for my router. It needed a reboot to work again. Surely there is some programming mechanism built-in to prevent one NAT address on the local network gobbling up all DNS traffic?
I'm guessing what I did was an accidental and primitive DoS attack.
Name: wanderer Date: August 15, 2005 at 09:18:09 Pacific
Reply:
your router isn't acting as a dns server. so those requests are being made of the dns server not the router. Those requests are passed thru if consulting the isps dns server. 11K doesn't seem that high to me but we don't know over what period of time.
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Response Number 2
Name: jam14online Date: August 15, 2005 at 09:30:14 Pacific
Reply:
Ah, so the router forwards DNS requests to the ISP's DNS server my modem is connected to? It was done over about 1-2 minutes, which works out at about 10 requests a second.
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Back connections and gami...
