Network slow only on one specific website

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urmel42

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Hi there,

I got a really weird network problem I just can't find a solution for. I've got a very quick internet connection at home, but one subdomain ( help.salesforce.com ) I am using several times a day is extremely slow (needs about 30 seconds to load). That is only the case with my laptops within my network. It is fast on my iPhone when it's connected to the Wifi and it's fast on the laptops when connected to a different network. Here is what I've tried so far:
  • Different browsers (Chrome, Firefox, Edge) and incognito mode on both laptops (still slow)
  • Switched off all my chrome extensions (still slow)
  • Accessed the website via a mobile hotspot (fast)
  • Accessed the website from different networks (fast)
  • Connected the laptops with the network via a LAN-cable (still slow)
The main browser used on the laptops is chrome which is synchronized between them. So I first thought that something (?) is being synchronized between the both laptops that causes the problem (any ideas what the could be?).

Any help is highly appreciated :)
 
Last edited:

TerryNet

Terry
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It is fast on my iPhone when it's connected to the Wifi
Possibly because the phone actually accesses a slimmed down "mobile" version of the site, not the robust site accessed by computers.

it's fast on the laptops when connected to a different network.
With this it's my suspicion that the problem lies in your ISP's gateway (using inefficient routing) or else in the DNS server you are using (only) with your network.
 

urmel42

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Thanks for the reply :)
I think it's not the ISP's fault since some colleagues use the same and they don't have any trouble. I also tried several different DNS providers but that didn't change anything either.
I recognized that when I come back to my network from a place where the site was quick, it is quick at home for about an hour as well. So something is obviously saved on my computer that makes it slow but I thought when using the incognito mode that problem shouldn't apply.

Any ideas?
 
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Thanks for the reply :)
I think it's not the ISP's fault since some colleagues use the same and they don't have any trouble. I also tried several different DNS providers but that didn't change anything either.
I recognized that when I come back to my network from a place where the site was quick, it is quick at home for about an hour as well. So something is obviously saved on my computer that makes it slow but I thought when using the incognito mode that problem shouldn't apply.

Any ideas?
maybe the owner limited it for you
 

Couriant

James
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To confirm, when you say laptops on my network, is this a work network or home network?
 

Couriant

James
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Fritz!Box 6490 Cable
OK so is this modem is a modem only device? I can't tell for sure. Also, is all of the devices on wireless? Can you try one computer with wifi off and connect directly to the modem to see if that helps at all?
 

Couriant

James
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urmel42

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Jan 8, 2021
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Also, is all of the devices on wireless? Can you try one computer with wifi off and connect directly to the modem to see if that helps at all?
Thanks for the replies. I connected the laptop directly but that didn't change anything.

Since it has a router, see if can change the DNS to a well-known DNS. Also if you are using FireFox, I believe they are using SecureDNS themselves.
Tried several different DNS but encountered the same problem with all of them. It is also not a Firefox-specific problem as I had a slow connection to the website in every browser I tried
 

Couriant

James
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OK, so to get this correct:

You have a modem/router combination at home. All computer devices are not able to connect to one site, regardless if the computer is on wireless or Ethernet (do you have another router connected to this, or a repeater?)

Same computer/s on a different network can go to the same site without delay. -- Is the other network the same ISP as yours?

One other question, and please use Ethernet for this if possible, is on the affected network, do the following commands:

ping -n 100 help.salesforce.com
ping - n 100 salesforce.com


Note: these commands at minimum will take about 1-2 minutes. I am only interested in the end results. Please copy the statistics in full and paste here. To copy, simply click and hold to drag/highlight, then press enter.

Here is an example:

Ping statistics for 184.31.10.133:
Packets: Sent = 100, Received = 99, Lost = 1 (1% loss),
Approximate round trip times in milli-seconds:
Minimum = 31ms, Maximum = 288ms, Average = 66ms
 

urmel42

Thread Starter
Joined
Jan 8, 2021
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Hi Couriant, thanks for your effort, it's really appreciated :)

I do not have a repeater at home and the problem doesn't occur with at other households with the same ISP. The laptop was connected via cable during the test with the commands you sent me.

help.salesforce.com:
Ping statistics for 185.79.140.13:
Packets: Sent = 100, Received = 100, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 15ms, Maximum = 35ms, Average = 21ms

salesforce.com
Ping statistics for 23.1.35.132:
Packets: Sent = 100, Received = 99, Lost = 1 (1% loss),
Approximate round trip times in milli-seconds:
Minimum = 292ms, Maximum = 404ms, Average = 312ms
 
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