-----Original Message----- From: CentOS [mailto:centos-bounces@centos.org] On Behalf Of Joseph L. Casale Sent: Thursday, February 2, 2017 8:58 PM To: 'CentOS mailing list' Subject: Re: [CentOS] Spotty internet connection
-----Original Message----- From: CentOS [mailto:centos-bounces@centos.org] On Behalf Of TE Dukes Sent: Thursday, February 2, 2017 6:13 PM To: 'CentOS mailing list' centos@centos.org Subject: [CentOS] Spotty internet connection
How do you IT guys diagnose the problem with a spotty internet
connection?
Just spent an hour on the phone with TWC/Spectrum. Of course they don't see anything wrong with their service.
They send me to speedtest.net. The first attempt, the page didn't fully load, the second attempt, the page didn't load at all, the third attempt, it loaded.
On a 20/2MB line I get 24.83/2.47MB. The speed is better than what I'm paying for but its spotty.
Lately I have been getting slow and partial page loads, server not found, server timed out, etc.. Get knocked off ssh when accessing my home server from work, etc. Its not the work connection because I don't have problems accessing other sites, just here at home and my home
server.
Is there any kind of utility to check for failing hardware?
All depends where and what the fault is.
You can use wireshark to check for duplicate acknowledgements and retransmissions, that's low hanging fruit.
Two recent issues I found that manifested in miserable browsing speed where poor dns resolution speed (many tools exist to determine your optimal forwarders or if you using the root hints it might expose this is
a less
than optimal configuration) made for long pauses and a bad cable for a
user.
The cable worked, and on the lan the retries made it seem like there
wasn't
problem. Over the wan, the retries made everything painfully slow.
Thanks,
My first thought it might be a dns issue. I may change to googles dns servers and see if things improve.
This just started in the last couple days. I know TWC and Charter are merging, but this is irritating.
I'll check out wireshark.