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Resolving for URLsInMAPS

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yapadu View Drop Down
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    Posted: 23 November 2009 at 9:01am
I see this type of thing in my logs often (hundreds and hundreds of times a day).

Resolving for URLsInMAPS: www..facebook.com
Resolving for URLsInMAPS: www..bpnews.net
Resolving for URLsInMAPS: www.=
Resolving for URLsInMAPS: www.carsguide.com=
Resolving for URLsInMAPS: www.carsguide.c=
Resolving for URLsInMAPS: emai=
Resolving for URLsInMAPS: email.enew=
Resolving for URLsInMAPS: =
Resolving for URLsInMAPS: email.enewslt=

Obviously they are not valid URL's, so they are usually followed by an error like this:

Error occurred during URLsInMAPS: DNS Server Reports Query Name Error

Of course the system does also find URL's that are possible, but it seems odd that it picks out these and tries to check them.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote LogSat Quote  Post ReplyReply Direct Link To This Post Posted: 23 November 2009 at 10:51pm
yapadu,

SpamFilter picks up various href tags embedded in HTML emails, both linking to URLs and to images. Sometimes the hrefs are encoded, other times they are simply incorrect. SpamFilter does not currently perform additional URL validation before submitting them for DNS lookups, which is why you will see these (innocuous) errors in the logs. 
Performing additional validation before actually checking a URL's domain in DNS would indeed eliminate most of those errors, however validating each URL would add (likely minimal) overhead to the entire process. As most of the times the URLs are actually valid, it was a judgement call on our part as so whether or not to validate URLs that would likely be valid to begin with. We opted not to, but this may change in the future if we see this to become a problem.
Roberto Franceschetti

LogSat Software

Spam Filter ISP
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