Questions tagged [network-speed]

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Could a faulty switch cause upload speeds for some to be slow?

We have recently switched our MSP which has caused a lot of problems with our network, but most of that is fixed and we've got one issue remaining: Half the people in our office have poor upload ...
0 votes
2 answers
6k views

How do I send all traffic generated by a command through a specific interface? Or, speed test for specific interface?

I am writing a script that basically scans OpenVPN servers using the openvpn client. By scanning I mean it checks whether if the server is accepting connections or not by attempting a connection, ping ...
1 vote
3 answers
5k views

Increase download speed of ftp server

I have a VSFTPD server running in my machine. The download speed is about 30 KB/s, which is way less than my connection speed. I understand the upload speed of the server affects the download speed on ...
2 votes
2 answers
953 views

Apache 2.4 on Windows slow to respond to initial first request

I started serving pre-compressed Brotli files on my website https://www.filmfix.com/en/home/. They work; but ever since then, Apache is having response issues along all VirtualHost setups (not just ...
0 votes
0 answers
115 views

How to monitor backbone link for bandwidth problems?

Is it possible to monitor the performance of specific internet backbone links, without special access? Or are there any maps or reports publicly available to show the current health of such links? I ...
-1 votes
2 answers
836 views

nginx and php-fpm waiting for server too long

I am using docker to mount nginx and a PHP-FPM using Phalcon Framework and React as the front end `upstream fastcgi_backend { server bfy-%APP_VERSION_UID%_buildify-php-fpm_1:90%FPM_PORT_PREFIX%; } ...
3 votes
2 answers
2k views

Test network transfer speeds with rsync from a server with limited storage

I want to test transfer speeds from server A to server B, but server A has limited disk space (<50GB) and because the network speeds are fast within the same data center, transferring 50 GB may be ...
1 vote
6 answers
3k views

Linux - check speed of a network

Does anybody know which command I can use in my Linux console, to check what the speed of the network of a costumer is? I have the network IP and gateway, is there anything I can do to perform a line ...
1 vote
0 answers
151 views

How to troubleshoot a server having SFTP, SCP transfer speeds of around 500 KB/s with many but not all machines?

We have two Ubuntu servers that have very slow upload and download SFTP, SCP, and RSYNC speeds, around 500 KB/s, when connecting from most home machines. These servers have fast corporate Internet ...
2 votes
2 answers
7k views

Slow network speed on ESXi hosts

I have been dealing with this problem for about half a year (had the luxury of time) and hadn't managed to crack it, so I finally resigned and came over here to ask for help from others not just ...
0 votes
1 answer
39 views

SFTP - files are only transferred in short bursts for one client - routing issue or SFTP/SSH configuration?

I have a server running Ubuntu 21.04.1 LTS with daily incoming file transfers via SFTP. For the most part, these work fine, but there is one particular client where the transfer speeds are ...
1 vote
1 answer
82 views

own openvpn server, connection falls down of 5% speed

I tried to set up my own openvpn server. Want to connect my devices like phone, tv, tablet, laptop and so on. My system of the VPS: CPU (4x): Socket Designation: CPU 0 Type: Central Processor ...
0 votes
1 answer
32 views

North America POS connecting to server in Asia

I have a client who (for some reason) have POS in North-East America, but the POS company and servers are in Asia. This results in occasional slow, duplicate, or incomplete transactions. The POS ...
2 votes
0 answers
134 views

LAN speed fluctuations

I am totally out of my depth here, but hopefully someone can at least tell me if what I am seeing is "normal" or not. I am in the process of migrating a VM from one ESXi host to another via ...
4 votes
4 answers
5k views

Why do some VPN clients slow down the network connection even when they are not it use?

I work as an I.T. consultant, and I often have to install various VPN clients on my computer in order to connect to customer's networks; beginning in March 2020, I started always working from home for ...
0 votes
1 answer
244 views

Set two IP addresses for parallel data transfers

I need to transfer massive amounts of data to my server from different client systems around the world as fast as possible. My organisation has two redundant lines from different service providers (...
1 vote
1 answer
676 views

Why do the creators of this dashboard multiply bytes by 8 to get bits? Isn't it the other way around?

To monitor a server we have imported a dashboard for Grafana. This uses Telegraf and InfluxDB as collector and database. When certain graphs needed to be adjusted, I noticed that in the network speed ...
5 votes
1 answer
3k views

socat tun device very low throughput

I was tinkering around with socat and tried to use socat for creating a TUN device for tunneling between two debian stretch servers. However, throughput seemed very low and comparing with iperf ...
11 votes
1 answer
15k views

SSH keys: ed25519 vs RSA performance demystified

It is claimed that ed25519 keys are better than RSA, in terms of security and performance. In terms of security, I understand that 4096 bits RSA keys are practically unbreakable for the foreseable ...
1 vote
1 answer
501 views

something is "blocking" my images from loading faster tried apache configs, nginx, cache header stuff, nothing changes

THE ISSUE : the images in my site takes a bit to start loading... like if something is blocking, but unable to pinpoint what could be the cause. PHP 8 / latest WHM LIVE EXAMPLE : https://www.stubfeed....
2 votes
2 answers
2k views

Why nfs transfer speed is slower than http?

Consider I have a large file on my nfs server. The server and my desktop is connected by 100mbps network. If I mount a directory on my desktop and then try to copy a big file to local fs I have speed ...
49 votes
9 answers
49k views

How fast is 127.0.0.1?

I wonder if it is tied to my NIC at all or if the OS or driver intercepts and immediately returns data sent to the loopback address? Does the signal actually travel to my NIC then the NIC returns it?
3 votes
3 answers
4k views

Testing network connectivity on a server with Gigabit Ethernet

I have a box with Gigabit Ethernet, and I'm unable to get past about 200Mbps or 250Mbps in my download tests. I do the tests like this: % wget -6 -O /dev/null --progress=dot:mega http://proof.ovh.ca/...
-2 votes
3 answers
362 views

I live in Australia, how is it that Stack Exchange is so fast without using any CDN?

I had a look at the Stack Exchange Servers: https://meta.stackexchange.com/questions/10369/which-tools-and-technologies-are-used-to-build-the-stack-exchange-network Seems they only have two data ...
0 votes
2 answers
1k views

Is it possible to have high internet speed with low bandwidth?

I just came to understand that the bandwidth is just the difference between the highest and the lowest frequency of transmission. And i also have and understanding that higher the frequency ==> ...
0 votes
3 answers
124 views

Internet speed required to use Microsoft Teams from Japan to the USA [closed]

I really hope this is the right place to ask (this is my first question here so please go easy). I have a great opportunity to go to work remotely (HR signed off on it) from Japan. I have a place to ...
0 votes
0 answers
88 views

1gb vs 10gb uplink in terms of TTFB

I am about to setup a new dedicated server, I have the option of 1gb vs 10gb uplink with a considerable price difference. I do only have 10 domains on this sever and traffic is not huge. However, on ...
0 votes
3 answers
64 views

Accelerate loading time in others countries by installing some kind of VPN? (What is it called?) [closed]

My servers are hosted in France (OVH) and my users are mainly from France. I am starting to have more and more users in Asia and North America, but some of them have huge speed problems : more than 3-...
0 votes
2 answers
4k views

Are we still limited by TCP Window Size when we want to fully utilize bandwidth from far away servers? [closed]

According to this website, as soon as round-trip time is increased, we lose a bit of our real-time capacity throughput to distant servers using default TCP Window size of 64KB. My network bandwidth is ...
3 votes
1 answer
2k views

How to limit the download speed after first N mb in Squid?

In my network, when someone is downloading big files, the internet speed is going down for everyone else. So what I want to do is, when someone starts downloading a file, he will download first 5 ...
1 vote
1 answer
556 views

Self Hosted Speedtest Command Line Script

I would like to write my own local speedtest script with a server script for listening to connections. To try and not duplicate my efforts, I haven't found much while searching. I can find lots of ...
0 votes
1 answer
98 views

Why do my P.L.Cs (Power line converters) devide the speed by two?

If I directly connect to my 100MB router with a CAT.5e cable, I get these results : $ speedtest --simple Ping: 8.617 ms Download: 92.54 Mbit/s Upload: 93.90 Mbit/s $ ethtool eth0 Settings for eth0: ...
-3 votes
1 answer
28 views

i want to visualize myself about bandwidth of internet [closed]

as we know bandwidth is just a way through which data flows.20 Mbps internet means 20 mega bits per second and 40 Mbps means 40 mega bits per second.i guess 20 Mbps means 20 Mb of data is retrieved in ...
0 votes
1 answer
71 views

What's the direction of speedtest download/upload? [closed]

What's the direction of download and upload in speedtest? The Server is Hong Kong STC, my local is: 12.34.156.228. When I test the speed, you can see the DOWNLOAD 28.38Mbps and UPLOAD 22.77Mbps. I ...
-1 votes
1 answer
3k views

Windows reporting 1Gbps but file transfer speed only 100Mbps

Things I checked: Windows adapter status confirms 1 Gbps connection on both PCs Removed other PCs connected to the network Both PCs are connected to TP-Link Archer A6 Isolated HDD speed by using ...
1 vote
1 answer
1k views

Why is there a difference in speed of forward and reverse traffic over 10 G network in iperf tool

I have a 10G network setup between my two servers (say, Server1 and Server2) and I'm using iperf tool to measure the bandwidth of the network. Here are test cases that I performed, Test Case 1: (...
0 votes
0 answers
92 views

openvpn clustering and throttle network speed

I am currently using Ubuntu for an OpenVPN server and it is working well. Each connected device can get an IP Address from the DHCP provided by the OpenVPN server. But for our project, is there a way ...
1 vote
1 answer
77 views

Why is upload way faster and more alternating in speed than download on local machine

I am writing a speed test to determine browser-server connection speed (js+php but I don't think it matters). I send a bunch of data-packages in different sizes and measure the time they need to reach ...
0 votes
1 answer
668 views

What does a "Blended IP" mean in terms of speed?

I'm getting a server colocated at a facility and they stated the internet speed will be 10 Mbps Blended IP on 100 Mbps Network Port. What does blended IP mean?
18 votes
6 answers
15k views

Why the discrepancy between Speedtest and Wget?

My customer complains about low internet speeds. When measured with Speedtest.net speeds are acceptable. Periodic measured downloads are 10% to 30% of the nominal speed. I cannot explain that. Some ...
1 vote
2 answers
1k views

Slow speed with Cisco 1721

I have a few Cisco 1721s and a WIC-4ESW. I was running another companies home router as my cable router, but decided to turn that into a wireless bridge and use my extra Cisco as my router. I ...
-1 votes
1 answer
28 views

Network share slow down over time

We have a Mac mini 2018 which share the content of a Raid NAS and after like 6-7 days the read/write speed of the connected user drop down, what would be a good way to investigate what is the problem ?...
0 votes
0 answers
798 views

Slow file transfer speed untill network service restart in CentOS

I have a Windows Server VM which connects to my Storage VMs running CentOS in another Data Centre over SFTP and FTP. The uplink between the servers are all 10Gbps and more and both VMs are ESXi ...
0 votes
0 answers
1k views

OpenVPN Connection very slow. Server located in Hong Kong, and Client Desktop is in New York

I have a OpenVPN vps server in Hong Kong. The specs is just 1 Core 2.2ghz CPU and 1GB of RAM. The connection is a 100mbit. But when I connect from my desktop in NY, my speed is only 1-2mbit only. I'm ...
1 vote
1 answer
56 views

Building reliable internet speed test tools

I'm interested in building a command-line speed test tool similar to the one used here. I started using it in a cron job to automatically check and record speeds at different times when we started ...
-2 votes
1 answer
39 views

Whether the Speed Auto can have a network speed reach to the switchport top?

My Juniper EX4300 Switch ge-0/0/42 switchport configuration is bellow: admin@1409A# run show interfaces ge-0/0/42 Physical interface: ge-0/0/42, Enabled, ...
1 vote
0 answers
300 views

What factor impact network speed between VM significantly?

There is question about network between different server,but i got a different situation. I have two VM in a server,and I tried to test maximum network speed between two VM. OS : CentOS VSwitch ...
1 vote
0 answers
478 views

Server Promoted to Domain Controller causes high ping times

We have recently (couple of months) been having issues with our internet, after dealing with our provider who states it is not their issue yet my boss and owner of the company is certain it is ...
0 votes
1 answer
79 views

Bandwidth to hosts abroad [duplicate]

I have a server with 1 Gbps uplink. Testing gives me a download/upload speed of approx 600 Mbps to servers nearby in Europe, and 100 Mbps to servers in US. I want to host a server and I need to know ...
1 vote
1 answer
399 views

Transfer speed to network share drops

I have an older HP Proliant ML350 G6 server with 1 x Xeon E5504 (2.0 ghz) and 8 gb ram. If I copy a large file (over 2 gb) to it from a windows 10 workstation, after about 1.5 gb the transfer speed ...