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Internet Related/Filtering/Firewall Thread, Slow page loading, sort of in Technical; So, we have a slightly odd issue with our connectivity at the moment. Pages take ages from asking for a ...
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    localzuk's Avatar
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    Slow page loading, sort of

    So, we have a slightly odd issue with our connectivity at the moment. Pages take ages from asking for a site to it actually starting to render in the browser.

    Eg.

    Entering Google and pressing enter
    There will be a 5+ second delay before the browser gets anything back and starts to render the page
    However, once things start appearing everything loads near enough instantly.
    Downloading a file will happen at 1Mbps+

    So, I'm trying to identify the weak link in our chain

    This is our setup:

    Onsite squid proxy (we also have a TMG box which I use for testing). Both return the same issue.
    Upstream proxy - SWGfL

    Local DNS servers, with forwarder to our LEA DNS servers which themselves forward out to the net.

    So far, I think I've narrowed it down to being DNS holding things up.

    If I do an nslookup on a machine to an external web address, I end up with something like this:

    Code:
    Server:  dnsserver.domain.extensionAddress:  IP.ADD.RE.SS
    
    
    DNS request timed out.
        timeout was 2 seconds.
    DNS request timed out.
        timeout was 2 seconds.
    Name:    drive.google.com
    Addresses:  2a00:1450:4009:808::1009
    	  173.194.41.133
    	  173.194.41.134
    	  173.194.41.135
    	  173.194.41.136
    	  173.194.41.137
    	  173.194.41.142
    	  173.194.41.128
    	  173.194.41.129
    	  173.194.41.130
    	  173.194.41.131
    	  173.194.41.132
    So, as far as I can tell it looks like the timeouts for DNS are reflecting in the page loads.

    How do I go about reducing this down?

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    sparkeh's Avatar
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    Does the issue occur with internal webpages? i.e. is the issue with your local DNS server or further upstream at your LA DNS.
    Can you test out using something like OpenDNS to take the upstream LA DNS out of the equation?

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    localzuk's Avatar
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    If I do an nslookup direct to our lea DNS servers, I get 3 2 second timeouts then a response.

    So, would you say that the LEA DNS is the cause then?

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    sparkeh's Avatar
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    Quote Originally Posted by localzuk View Post
    If I do an nslookup direct to our lea DNS servers, I get 3 2 second timeouts then a response.

    So, would you say that the LEA DNS is the cause then?
    Well, if internal lookups are fine (so they never touch the LA DNS) and the LA DNS lookups return the timeouts you describe then it seems to me the problem is beyond your DNS/network.
    Given that once the DNS is done, websites load quickly (ruling out connectivity issues), my money would be on the LA DNS having issues.



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