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Is AVSIM undergoing a Denial Of Service attack?!?!?

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Here in the Midwestern US, I've been getting a 503 error every time I try to visit the site. However, after a quick refresh, it works just fine (no glitches, not particularly faster/slower than its ever been). 

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If I go in directly via forum.avsim.net the time to response is half or less that of the main page.

 

DJ

Same problems here in Florida few several days now. It does seem to be something going on with the main page. Been very slow to respond. Some times refresh works and some times not. I have just kind of thought it may be reaction to the cave dweller threats.

 

UPDATE......OK...here it is, Hillary is erasing more hard drives and got mixed up!!

Sam

Prepar3D V5.3/[email protected]/EVGA 3080 TI/1000W PSU/Windows 10/40" 4K Samsung@3840x2160/ASP3D/ASCA/ORBX/
ChasePlane/General Aviation/Honeycomb Alpha+Bravo/MFG Rudder Pedals/

  • Moderator

For whatever it's worth, I never even bother with the front page. When I visit AVSIM I come straight to the forums: http://forum.avsim.net/index/

 

I rarely have any problems, although at times the forum server response is a bit on the sluggish side.

Fr. Bill    

AOPA Member: 07141481 AARP Member: 3209010556


     Avsim Board of Directors | Avsim Forums Moderator

I reckon it's aliens. It must be. Pesky little sods.

Christopher Low

AMD Ryzen 7 9800X3D CPU / 64GB DDR5-6000 RAM / 12GB Nvidia RTX 4070 Super GPU / Gigabyte X870E Aorus Elite Wifi 7 / 1+2TB Samsung Evo Plus M2 Nvme

UK2000 Beta Tester

I guess it should be pointed out that avsim.net and forums.avsim.net point to different IP's so, and I don't know the frontend infrastructure, but the two sites are hosted on different web servers (or multie ther eof, if it's loadblanced) so that might explain why some are seeing hits (i.e if forums is running fine but the main site isn't) and some are not. It depends what you are hitting. I don't know the frontend, so I can't comment, only speculate

Chris Smith

I haven't looked at front page in over a week and I've had this issue several times

ckyliu, proud supporter of ViaIntercity.com. i5 12400F, 32GB, RTX4070, more in "About me" on my profile. 

support1.jpg

We are being hit from IP's originating mainly in Russia and some from China and the Ukraine.  I think we are on top of it and these hits on our servers will stop soon. 

 

Best regards,

Jim Young | AVSIM Online! - Simming's Premier Resource!

Member, AVSIM Board of Directors - Serving AVSIM since 2001

Submit News to AVSIM
Important other links: Basic FSX Configuration Guide | AVSIM CTD Guide | AVSIM Prepar3D Guide | Help with AVSIM Site | Signature Rules | Screen Shot Rule | AVSIM Terms of Service (ToS)

I7 8086K  5.0GHz | GTX 1080 TI OC Edition | Dell 34" and 24" Monitors | ASUS Maximus X Hero MB Z370 | Samsung M.2 NVMe 500GB and 1TB | Samsung SSD 500GB x2 | Toshiba HDD 1TB | WDC HDD 1TB | Corsair H115i Pro | 16GB DDR4 3600C17 | Windows 10 

 

What does that mean Jim?    that people or organisations are purposely attacking the website Avsim,  to what gain though?  To gather information or a financial gain of some sort 


Or are we just caught between something 

 

 

 

It appears a solid IPS and IDS system is needed. A Cisco ASA 5520 with an Adv. IP Sec license would do the trick

David Graham Google, Network+, Cisco CSE, Cisco Unity Support Specialist, A+, CCNA

 

Poppet - just a way of being obnoxious in this brave new world we live in.  No gain is necessary.

 

DJ

  • Commercial Member

I'd be curious to see what percentage of total site traffic was obviously bogus, relative to legitimate-looking traffic.

 

In my experience, my engineering teams were the sources of most DDOS attacks - poorly written or designed code when run by legitimate users was far more likely to bring us down than a few random hits from overseas.

 

Cheers!

 

Luke

Luke Kolin

I make simFDR, the most advanced flight data recorder for FSX, Prepar3D and X-Plane.

We are being hit from IP's originating mainly in Russia and some from China and the Ukraine.  I think we are on top of it and these hits on our servers will stop soon. 

 

Best regards,

Glad to read such reassuring news, Jim. We cannot let these low-life toads in these countries try to undermine our community. Tom would proud of you and all the Avsim Team fighting this off.

Rick Almeida

 

 


It appears a solid IPS and IDS system is needed. A Cisco ASA 5520 with an Adv. IP Sec license would do the trick

 

Okay, we'll get that right away!  :rolleyes: Tom went through these issues almost monthly as the site was constantly being hacked by hackers and spammers in certain foreign countries.  We have had a few former members try to destroy our community too.  He was very successful in stopping these attempts.  The infrastructure he built is still very modern and successfully identifying and stopping these attacks.  We also have an additional security firewall.  It's just that this is sort of new to the members of the Board of Directors' but we are learning fast (or at least I am).  There will certainly be some glitches occasionally where members will see the 503 error or some other error message.  Usually hitting F5 30 seconds later will refresh the site and you will be back on (at least this has been my experience).  Anyone who is off longer may need to delete their browser cache and/or shutdown their ISP router for at least 30 seconds, restart, and then log back on.  Clicking on the large AVSIM Icon at the top of the forums or going to the front page will also get you out of the error on some occasions too.

 

Thanks to everyone for the patience.

 

Best regards,

Jim Young | AVSIM Online! - Simming's Premier Resource!

Member, AVSIM Board of Directors - Serving AVSIM since 2001

Submit News to AVSIM
Important other links: Basic FSX Configuration Guide | AVSIM CTD Guide | AVSIM Prepar3D Guide | Help with AVSIM Site | Signature Rules | Screen Shot Rule | AVSIM Terms of Service (ToS)

I7 8086K  5.0GHz | GTX 1080 TI OC Edition | Dell 34" and 24" Monitors | ASUS Maximus X Hero MB Z370 | Samsung M.2 NVMe 500GB and 1TB | Samsung SSD 500GB x2 | Toshiba HDD 1TB | WDC HDD 1TB | Corsair H115i Pro | 16GB DDR4 3600C17 | Windows 10 

 

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