User
Hazard to Others
Posts: 339
Registered: 7-11-2008
Location: Earth
Member Is Offline
Mood: Passionate
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Provider blocking smdb...wtf
Hi,
Last week i noticed something very strange.
I did my daily forum round and realized i could not connect to SMDB.
Lots of factors here one could say, well i tested a couple of those.
Cleaning cache (cookies etc)
Dumping IP adress.
Resetting the stuff.
Trying other PC.
Nothing...
So I figured smdb is offline..Again.
Waited a freaking week...
And then something magical happend.
I logged on to my neighbours network.
(I am posting right now..)
So could it really be that it is blocked in any way?
Also could there be reason to?
I could still try connecting thru a proxy to check if this confirms any.
I wont reveal my provider but if it will be of importance ill do so.
Btw, I'm from holland 
Can anyone share some thoughts.
What a fine day for chemistry this is.
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psychokinetic
National Hazard
Posts: 558
Registered: 30-8-2009
Location: Nouveau Sheepelande.
Member Is Offline
Mood: Constantly missing equilibrium
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Have you tried coming back from your network again? The entire site was up shit creek with a paddle left in the shed for a while while the head
cheeses moved everything to a new server.
Here's hoping I'm right and there's no blocking going on.
“If Edison had a needle to find in a haystack, he would proceed at once with the diligence of the bee to examine straw after straw until he found
the object of his search.
I was a sorry witness of such doings, knowing that a little theory and calculation would have saved him ninety per cent of his labor.”
-Tesla
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Polverone
Now celebrating 21 years of madness
Posts: 3186
Registered: 19-5-2002
Location: The Sunny Pacific Northwest
Member Is Offline
Mood: Waiting for spring
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Yesterday the site became very slow because a few IP addresses had hundreds of connections open for file downloads from the site. It looked like they
were spider programs. I don't mind spidering and archiving of the site but it was making the forum unusable. So I wrote a script that would check for
IP addresses with more than 20 connections open to the site, and block them for up to 24 hours by adding a deny rule to the web server configuration.
It appears that a few users have been caught by this rule, though I'm not sure why yet. Before I added the 20 connection limit, I tested with Firefox
and my own home DSL IP address, opening many threads as quickly as I could in different tabs. I couldn't get the number of open connections from my
browser to go above 10. I thought 20 was plenty of head room for ordinary browsing.
But at least the following forum members have been caught by this rule today:
User
franklyn
carbonfeind
hua xue DIY
white rabbit
I was able to determine that by checking the blocked IP addresses against posting IP addresses. I am going to try to determine why those users had
problems, and for now I am raising the open connection limit to 40 and clearing out the currently blocked addresses.
Edit: of the above, only hua xue DIY looked to actually be downloading more than ordinary. The other blocked users were a mixture of IE and Firefox
users, so I can't easily blame a browser.
[Edited on 12-5-2009 by Polverone]
PGP Key and corresponding e-mail address
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User
Hazard to Others
Posts: 339
Registered: 7-11-2008
Location: Earth
Member Is Offline
Mood: Passionate
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Right now iam connected through a free proxy server it really is the only way to even get to the website.
Anyway thanks for handling this issue.
*edit*
This is what i get if iam connecting the normal way:
404 Not Found
The resource requested could not be found on this server! Powered By LiteSpeed Web Server
LiteSpeed Technologies is not responsible for administration and contents of this web site!
[Edited on 5-12-2009 by User]
What a fine day for chemistry this is.
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Polverone
Now celebrating 21 years of madness
Posts: 3186
Registered: 19-5-2002
Location: The Sunny Pacific Northwest
Member Is Offline
Mood: Waiting for spring
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Quote: Originally posted by User  | Right now iam connected through a free proxy server it really is the only way to even get to the website.
Anyway thanks for handling this issue.
*edit*
This is what i get if iam connecting the normal way:
404 Not Found
The resource requested could not be found on this server! Powered By LiteSpeed Web Server
LiteSpeed Technologies is not responsible for administration and contents of this web site!
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You have DNS problems if that is the message you get. You would get a 403 forbidden error if the problem were the blocking script. Sciencemadness.org
should resolve to 74.207.252.200. You could manually add hosts entries for sciencemadness.org and www.sciencemadness.org that resolve to those addresses. Another possibility is to set your primary DNS server to 4.4.2.2 rather than the one
you're currently using (probably controlled by your ISP).
[Edited on 12-5-2009 by Polverone]
PGP Key and corresponding e-mail address
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