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Moving forward with Composr

ocPortal has been relaunched as Composr CMS, which is now in beta. ocPortal 9 will be superseded by Composr 10.

Head over to compo.sr for our new site, and to our migration roadmap. Existing ocPortal member accounts have been mirrored.


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Posted
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#105396 (In Topic #20555)
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Honoured member

This is somewhat unique, but was wondering if anyone knew of a way to force visitors bowsers to dump cache related to one's domain?

Our DNS provider had a major crash and ever since traffic has been in the tank. Accordingly, even 48 hours later am receiving feedback that people are still having issues with getting DNS errors.

Have also noted that specific IP address ranges we normally have a lot of traffic in have not been showing up since this issue occurred.

It would seem that by forcing the cache to be cleared that the issue could be resolved??

Any thoughts would be greatly appreciated!!!

Thanks,

- Rick

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Posted
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#105398
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Probably it is the DNS cache they need to clear, not the browser cache.
ipconfig /flushdns on Windows on the command line then restart all web browsers (as they have internal caching too).

Can't do it from your end because they're not reaching your end.


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Posted
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#105399
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Chris Graham said

Probably it is the DNS cache they need to clear, not the browser cache.
ipconfig /flushdns on Windows on the command line then restart all web browsers (as they have internal caching too).

Can't do it from your end because they're not reaching your end.

Thanks Chris!

Completely overlooked that…. :$

So, what you are saying is that Unless we can send instructions out to end users, there basically isn't anything that can be done except keep waiting for what seems to be a very long propagation time to complete?

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Posted
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#105400
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If that's the cause, yes. A number of factors control the time, but the main one if the 'ttl' configured in the DNS.


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Was I helpful?
  • If not, please let us know how we can do better (please try and propose any bigger ideas in such a way that they are fundable and scalable).
  • If so, please let others know about ocPortal whenever you see the opportunity.
  • If my reply is too Vulcan or expressed too much in business-strategy terms, and not particularly personal, I apologise. As a company & project maintainer, time is very limited to me, so usually when I write a reply I try and make it generic advice to all readers. I'm also naturally a joined-up thinker, so I always express my thoughts in combined business and technical terms. I recognise not everyone likes that, don't let my Vulcan-thinking stop you enjoying ocPortal on fun personal projects.
  • If my response can inspire a community tutorial, that's a great way of giving back to the project as a user.
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Posted
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#105402
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Chris Graham said

If that's the cause, yes. A number of factors control the time, but the main one if the 'ttl' configured in the DNS.

Looks like a lot of folks don't have 86400!

Thanks  :)
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Posted
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#105403
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Community saint

If you are noticing problems from specific IP address ranges then it may actually be a problem with the users ISPs DNS servers.

ISPs get IP addresses in blocks, and most users will just use the default DNS servers provided by their ISPs.

I used to have intermittent problems with not being able to get to certain domains while others domains resolved fine. Turns out my ISPs was DNS servers were less then reliable. Since then I have changed to a different DNS server and have not had any further problems.

Do you have a Samsung Galaxy S / Galaxy S II ? If so, why not check out my ScreenFree FM Radio .
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Posted
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#105404
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Community saint

To find out what ISP your user is with you can use something like IP Address Lookup .

Do you have a Samsung Galaxy S / Galaxy S II ? If so, why not check out my ScreenFree FM Radio .
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Posted
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#105410
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Thanks will have to look into that!

On a side note:

It appears every time our site gets busy on game days which have a lot of read and write activity going on simultaneously, my connection/processing speed suddenly becomes HORRIBLE!

Tonight was a great example of that.

20-45 seconds per write for me when posting - I am an admin…not going to work.

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