500 Unable To Connect

[troy]

Hi All,
I am trying to submit to JK but after 3 weeks I only get:

Error!
Your submission could not be accepted for the following reason(s):
Your Site's URL appears invalid, as it has returned the response "500 Unable To Connect".

I tried to email JK but got no reply. Anyone here knows what might be the problem?
It can't be on my side because everything is up and running. I also submitted different URL's.

Thanks in advance.

[Cleo]

The submit page comes right up for me.

[troy]

Hi Cleo,
Yes the submit page is ok I get this message after submitting.

[Cleo]

I just did a please delete test submit and it worked fine.
"Thank You
Thanks for submitting your site to JK's Porn Links. If you're site is accepted, it should be listed within 48 hours."

The script checks the status of the page your are submitting. I know this because the first test submit I did using apple.com returned a 302 error code on JK's submit page so maybe the issue is with the page you are trying to submit.

[troy]

I submitted this page
http://www.internal-creampie.com/bla...orn/index.html

I only have this problem with JK the other 60 LL's I submit to work fine.

[Cleo]

That page returns a 200 status code so I'm out of ideas.

[cd34]

If I had to guess, it looks like you have reverse dns lookups turned on, their bot/linkchecker possibly doesn't have reverse dns and has a short timeout. Your site looks up the DNS of the visiting bot, takes 27 seconds to time out, their bot/linkchecker times out after 5 or so seconds, and, invalid connection.

You might check your apache config to turn off dns lookups:

HostnameLookups Off

or, check your .htaccess for something like

deny from *.domain.com
or
deny from 12.23.*.*

The latter case doesn't ban just an IP block and forces a reverse DNS lookup for each query since 12.23.domain.com could be valid and would match your rules.

If you want to block just those IPs

deny from 12.23.

would do that.

or

deny from 12.23.0.0/16

[JK]

Hi Troy,

I replied to your email on the 19th, not sure why you didn't get it.

As a temporary fix, you can submit your sites with my contact form: http://www.jk-porn.com/contact.html and I'll add them in manually for now.

Also have a look at cd34's advice.

JK

[troy]

Hi JK,
I was on holliday for 2 weeks so my mailbox was flooded and I must have missed your email. Sorry for that.

cd34 you were right about my dns the reverse dns lookups turned on.
Only support told me its better to have it turned on. Can you tell me if there are any risk involved by turning the reverse dns lookups off?

Thanks for your time Cleo.

[cd34]

Reverse DNS Lookups are used to prevent spoofing attacks on hostname based authentication. Disabling that is a matter between you and your host.

Short of some very specific cases, we haven't run Reverse DNS lookups on production sites due to the slight performance hit the first time a new surfer hits a site.

[troy]

Thanks for the info cd34.

[euphline]

Originally Posted by cd34

Reverse DNS Lookups are used to prevent spoofing attacks on hostname based authentication. Disabling that is a matter between you and your host.

Short of some very specific cases, we haven't run Reverse DNS lookups on production sites due to the slight performance hit the first time a new surfer hits a site.

I haven't run reverse lookups on anything in years. While spoofing attacks are always of interest, lately my biggest battle has been with DOS attacks. All of the recent attacks I've dealt with have been from IPs that reverse. I've always considered the server load hit (particularly in a DDOS situation) from doing reverses too big.

-jbn