Waarom is mijn FTP-downloadsnelheid traag?

FTP is one of the most common methods used for transferring files from a remote server to uw computer. FTP transfer can have an ideal experience if FTP speeds are maximized but that is not always the case.In deze handleiding, we will provide all the information needed so that u kunt troubleshoot your problems and find optimal solutions, and use most of your resources for better speed performance.

Table of Contents:

2. Possible speed limitations:
2. FTP speeds metrics
4. Network Bandwidth limitations
6. Network hardware limitations
8. Testing FTP speeds
4. FTP working mechanism and protocols:
2. How FTP works?
4. Alternative to FTP protocol
6. Configuring your FTP client for maximum speed 
2. Concurrent Downloadens
4. Segmented Downloadens
6. Other settings which can improve FTP speeds
8. Troubleshooting slow FTP speed
2. Verifying network
4. Using wired connection vs Wireless network
6. Checking your Firewall

2. Possible Speed limitationsYour network bandbreedte is the most important factor which determines your FTP speed. Knowing your network bandbreedte would enable you to understand the network resources beschikbaar at your end.
• FTP Speeds metrics:Your ISP may have provided your bandbreedte in terms of MB/s or Mib/s which have different meanings. So let’s first get our speeds metrics understanding right. We will use 1 Mbps (Megabits per second) as the base unit.

• One Mbps = 1000 Kbps (Kilobits per second). 
• 1 Mbps = 125 KB/s (Kilobytes per second).
• One Mbps = 976.5 KiB/s (Kibibites per second). 
• 1 Mbps = 122.07 KiB / s (Kibibytes per second). 
• One Mbps = 0.953674 Mib/s (Mebibites per second).
• 1 Mbps = 0.125 MB/s (Megabytes per second).

• Network bandbreedte Limitations:
  Most ISPs advertise their Internet downloadsnelheids in Mbps. While it is technically correct, it confuses many consumers, because their testing tools display other metrics. Some ISPs ook advertise only their asymmetrical speeds. They show how incredible their downloadsnelheids are but don’t mention the upload speeds, which sometimes are 3x slower. To know your real bandbreedte, measure it using online testing tools. U kunt use tools like ookla speed test which biedt you all the details van uw upload speed to downloadsnelheid and ook the correct speed metric used for measuring your speed.

• Network Hardware Limitations:
  Your Local machine’s limitations – A computer with low CPU and ram memory can result in slower FTP speeds but a high-end computer with average network bandbreedte ook doesn’t give encouraging speeds.
  Wi-Fi connections are slower due to packet loss and delay. Wi-Fi protocols like 802.11n support high-speed bandbreedte up to 300 Mbps but they are not ideal choice for constant uploading and downloading.
• Testing your FTP downloadsnelheids:
  U kunt test your FTP downloadsnelheids using popular free-to-use tools like Tele2Speedtest. This service allows you to test both the upload and downloadsnelheid through your FTP client without providing a gebruikersnaam and wachtwoord.

2. FTP working mechanism and protocols:
2. How FTP works?FTP works as a basic server/client protocol. In simple words, a network connection enables you to send and receive files with each other. It uses the TCP/IP protocol model for communication and for file transfer. It uses port number 21 for creating connections but the downside of FTP is that it doesn’t provide encryption.The FTP Client biedt: 

• Seedbox Login inloggegevens.
• FTP commands. 
• browse directory

The FTP Server biedt

• Authentication.
• Directory display
• Port assignment.

Let’s understand the functionality of FTP keeping seedbox in mind:

2. Your seedbox biedt inloggegevens and IP or hostname to access uw seedbox (FTP server) remotely from uw computer (FTP client)
4. You log in remotely into uw seedbox from uw computer.
6. From uw seedbox u kunt download files as the FTP server in uw seedbox biedt authentication and assign port numbers (21,22).
8.  U kunt now use your FTP client as an interface to connect naar uw FTP server as it takes login inloggegevens, sends FTP commands, and browses through the file directory.

2. Alternatives to FTP:Apart from FTP, there are many other protocols and applications which provide much better security and file transfer speeds compared to FTP. A protocol like SFTP(SSH File Transfer Protocol) works through SSH and biedt much better security over FTP. HTTP and HTTPS provide much faster speeds along with good security features which makes it a good alternative to FTP as a whole.
4. FTP vs SFTPThe main difference between the two protocols (FTPS and SFTP) is their way of functioning. There is a performance overhead on FTPS since it needs multiple ports. For every new transfer file is requested, FTPS requires a new port for the data channel. The upside of dit is that the control and data channels run asynchronously in two different connections; this exclusive data channel makes transfers much faster. While the  SFTP needs one port number for all communication to the data channels, making it much easier to secure and with less performance overhead. But having the same channel for control and data can turn out to be a bit slower.
6. Configuring your FTP client for maximum speed
2. Concurrent Downloadens:The concurrent download is a technical concept where it gives the ability to download multiple files simultaneously at the same time using FTP. FTP applications that support this feature create multiple connections to the server for downloading. It is very beneficial when someone is trying to download a folder of files. Let’s assume that  er is a session bandbreedte limitation then creating multiple connections will eventually exceed the provided per session speed which will result in an overall improvement in downloadsnelheid.Free to use FTP clients which provide concurrent downloads are – FileZilla
4. Segmented Downloadens:A fragmented download is actually a file transfer concept where a large file at the sender end is broken into fragments or pieces and these pieces are sent to the receiver through multiple FTP connections and at the receiver’s end these pieces are recombined to produce the original file.In this FTP transfer technique fragments of a single file are downloaded simultaneously through multiple FTP connections and after downloading these fragments these are recombined to create the original file.Free to use FTP apps that provide this capability are: BitKinex, CuteFTP Pro, Progressive Downloadener (MAC)
6. Other settings which can improve FTP speedsFTP Speed limits: Please make sure that your FTP client does not have any download/upload speed limits. FTP active and passive mode: Als ur FTP is hosted with NAT( proxy or VPN), the FTP Passive mode should be configureerd. The passive mode seems to be slower than active.
8. Let’s verify the network Loss of packets within the network can ook contribute to slower FTP  speeds.
10. Ping the local gateway

Related Speed Guides #

• Get Faster FTP Downloadens
• Maximize FileZilla Speed
• Reroute for Better Speeds
• Why Is My Seedbox Slow?