File transfer protocol over LAN

Hello every wizards of this world...i extemely need ur help...plz...can i ask for ur helping hands to give us a running codes for file transfer. on socket programming over LAN(local area network)..we nid this codes for our project...we find hard searching for it on the internet...there are lots of examples but it doesn't work...

FTP

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FTP/SFTP/FISH (etc) slow file transfer rate over LAN

Hi everyone,
I have a problem with transferring files over my home network that has been bothering me for quite some time.
I have a 802.11n router which should provide me with the transfer rate up to 150 Mbps (afaik). When I download files from the Internet, 3 MB/s data transfer rate is of no problem.
However, when receiving or sending data over LAN, the transfer rate is much slower (1.8 MB/s).
My rough guess is (after reading some papers on this topic) that TCP protocol is causing this (its flow control feature to be exact), since TCP max window size is too small on Linux by default.
So, setting TCP max window size to a greater number should solve this.
I tried putting this:
# increase TCP max buffer size setable using setsockopt()
# 16 MB with a few parallel streams is recommended for most 10G paths
# 32 MB might be needed for some very long end-to-end 10G or 40G paths
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
# increase Linux autotuning TCP buffer limits
# min, default, and max number of bytes to use
# (only change the 3rd value, and make it 16 MB or more)
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65536 16777216
# recommended to increase this for 10G NICS
net.core.netdev_max_backlog = 30000
# these should be the default, but just to be sure
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_sack = 1
in /etc/sysctl.conf but to no avail.
So either there is no problem with the max window size setting, or the Linux kernel ignores it (maybe because /proc is no longer supported?).
Thanks for any neat ideas.
Last edited by Vena (2012-06-01 21:48:14)

Bump? No ideas whatsoever?

Can we able to write code File transfer protocol code in HTTPServlet file ?

Can we able to write code File transfer protocol code in Http file ?
if Yes , give some details about how to write
if No, give some reason why not .
Thanks

Hi Paul(DrClap)
My question is ,if we are using a java
file(servlet) which is handing httprequest , can we
use this to handle FTP request also.As I already said, you can't use a servlet as an FTP server.
can we able to write FTP code in above mentioned file?As I already politely pointed out, "FTP code" is ambiguous until you specify whether you mean server or client code.
So. If you don't understand what clients and servers are, then drop this question and go away until you do understand. It's not that complicated.
And please don't waste my time by responding with the same questions over again.

Is there any way to use a file transfer protocol to upload files to icloud?

Is there any way to use a file transfer protocol to upload files to icloud?

Unfortunately, no.
You will need a 3rd party web host to upload your websites to. Depending on the version of iWeb you are using you have a couple of publishing options:
iWeb ’09 (3.0.4) you can publish to an FTP Server or a local folder. ( With the built in FTP in iWeb you will end up with an address like “www.YourDomain.com/sitename/Home.html )
iWeb ’08 you can publish your website to a local folder
Basically all Web Hosting companies are iWeb-compatible.
If you’re looking for a good hosting I would recommend IX Web Hosting I have been using them to host my own websites for several years now and that their customer support is awesome too.
http://jeffnitschke.com/IXWebHosting.html
http://jeffnitschke.com/wordpress/2012/06/how-do-i-move-my-mobileme-site-ix-web- hosting-blog/
"I may receive some form of compensation from my recommendation or link."

SSH File Transfer Protocol

Has anyone successfully implemented ssh file transfer protocol on a pix(515 or 525)?

Please elaborate what you're trying to achieve.
Secure FTP (sFTP) to the firewall or through
the firewall?
CCIE Security

Large file transfer problems over client/server socket

Hi,
I wrote a simple chat problem in which I can send files from client to client. The problem is when I send large files over 101 MB the transfer freezes. I do not even get any error mesages in the console. The files I am sending are of any type (Ex mp3, movies, etc...). I am serializing the data into a "byteArray[packetSize]" and sending the file packet by packet until the whole file has been sent, and reconstructed on the other side. The process works perfectly for files smaller than 101MB, but for some reason freezes after that if the file is larger. I have read many forums and there aren't too many solutions out there. I made sure to use the .reset() method to reset my ObjectOutputStream each time I write to it.
Here's my file sending code:
byte[] byteArray = new byte[defaultPacketSize];
numPacketsRequired = Math.ceil(fileSize / defaultPacketSize);
try {
int i = 0;
reader = new FileInputStream(filePath);
while (reader.available() > 0) {
if (reader.available() < defaultPacketSize) {
byte[] lastPacket = new byte[reader.available()];
reader.read(lastPacket);
try {
if (socket == null || output == null) {
throw new SocketException("socket does not exist");
output.writeObject(lastPacket);
output.reset();
output.writeObject("DONE");
output.reset();
output.close();
socket.close();
catch (Exception e) {
System.out.println("Exception ***: " + e);
output.close();
socket.close();
else {
reader.read(byteArray);
try {
if (socket == null || output == null) {
throw new SocketException("socket does not exist");
output.writeObject(byteArray);
output.reset();
catch (Exception e) {
System.out.println("Exception ***: " + e);
output.close();
socket.close();
reader.close();
catch (Exception e) {
System.out.println("COULD NOT READ PACKET");
Here's my file receiving code:
try {
// The message from the client
Object streamInput;
FileOutputStream writer;
byte[] packet;
while (true) {
streamInput = input.readObject();
if (streamInput instanceof byte[]) {
packet = (byte[]) streamInput;
try {
writer = new FileOutputStream(outputPath, true);
writer.write(packet); //Storing the bytes on file
writer.close();
catch (Exception e) {
System.out.println("Exception: " + e);
else if (streamInput.equals("DONE")) {
socket.close();
input.close();
break;
catch (Exception e) {
I'm looking for any way I can possibly send large files from client to client without having it freeze. Are there any better file transfer ways other than socket? I don't really want FTP. I think I want to keep it HTTP.
Any suggestions would be helpful.Thanks!
Evan

I've taken a better look a the code you posted, and
there is one problem with the receiving code. You
keep repeatedly opening and closing the
FileOutputStream. This is not going to be efficient
as the file will keep needing to be positioned to its
end.Yes sorry I did change that code so that it leaves the file open until completely done writing. Basically I have a progress bar that records how far along in the writing process the client is, and when the progress bar reaches 100%, meaning the file is complete, the file.close() method is invoked. Sorry about that.
I also ran some memory tests using the "Runtime.getRuntime().totalMemory()", and "Runtime.getRuntime().freeMemory()" methods. I put these methods inside the loop where I read in the file and send it to the client. here's the output:
Sender's free memory: 704672
File reader read 51200 bytes of data.
767548 left to read.
Sender's runtime memory: 2818048
Sender's free memory: 702968
File reader read 51200 bytes of data.
716348 left to read.
Sender's runtime memory: 2818048
Sender's free memory: 701264
File reader read 51200 bytes of data.
665148 left to read.
Sender's runtime memory: 2818048
Sender's free memory: 699560
File reader read 51200 bytes of data.
613948 left to read.
Sender's runtime memory: 2818048
Sender's free memory: 697856
File reader read 51200 bytes of data.
562748 left to read.
Sender's runtime memory: 2818048
Sender's free memory: 696152
File reader read 51200 bytes of data.
511548 left to read.
Sender's runtime memory: 2818048
Sender's free memory: 694448
File reader read 51200 bytes of data.
460348 left to read.
Sender's runtime memory: 2818048
Sender's free memory: 692744
File reader read 51200 bytes of data.
409148 left to read.
Sender's runtime memory: 2818048
Sender's free memory: 691040
File reader read 51200 bytes of data.
357948 left to read.
Sender's runtime memory: 2818048
Sender's free memory: 689336
File reader read 51200 bytes of data.
306748 left to read.
Sender's runtime memory: 2818048
Sender's free memory: 687632
File reader read 51200 bytes of data.
255548 left to read.
Sender's runtime memory: 2818048
Sender's free memory: 685928
File reader read 51200 bytes of data.
204348 left to read.
Sender's runtime memory: 2818048
Sender's free memory: 684224
File reader read 51200 bytes of data.
153148 left to read.
Sender's runtime memory: 2818048
Sender's free memory: 682520
File reader read 51200 bytes of data.
101948 left to read.
Sender's runtime memory: 2818048
Sender's free memory: 680816
File reader read 51200 bytes of data.
50748 left to read.
Sender's runtime memory: 2818048
Sender's free memory: 679112
File reader read 50748 bytes of data.
0 left to read.
Creating last packet of size: 50748
Last packet size after setting it equal to byteArray: 50748
Here's the memory stats from the receiver:
Receiver's free memory: 639856
Receiver's total memory: 2842624
Receiver's free memory: 638920
Receiver's total memory: 2842624
Receiver's free memory: 637984
Receiver's total memory: 2842624
Receiver's free memory: 637048
Receiver's total memory: 2842624
Receiver's free memory: 636112
Receiver's total memory: 2842624
Receiver's free memory: 635176
Receiver's total memory: 2842624
Receiver's free memory: 634240
Receiver's total memory: 2842624
Receiver's free memory: 633304
Receiver's total memory: 2842624
Receiver's free memory: 632368
Receiver's total memory: 2842624
Receiver's free memory: 631432
Receiver's total memory: 2842624
Receiver's free memory: 630496
Receiver's total memory: 2842624
Receiver's free memory: 629560
Receiver's total memory: 2842624
Receiver's free memory: 628624
Receiver's total memory: 2842624
Receiver's free memory: 627688
Receiver's total memory: 2842624
Receiver's free memory: 626752
Receiver's total memory: 2842624
Receiver's free memory: 625816
Receiver's total memory: 2842624
Receiver's free memory: 624880
Receiver's total memory: 2842624
Receiver's free memory: 623944
Receiver's total memory: 2842624
Receiver's free memory: 623008
Receiver's total memory: 2842624
Receiver's free memory: 622072
Receiver's total memory: 2842624
Receiver's free memory: 621136
Receiver's total memory: 2842624
Receiver's free memory: 620200
Receiver's total memory: 2842624
Receiver's free memory: 619264
Receiver's total memory: 2842624
Receiver's free memory: 618328
Receiver's total memory: 2842624
Receiver's free memory: 617392
Receiver's total memory: 2842624
Receiver's free memory: 616456
Receiver's total memory: 2842624
Receiver's free memory: 615520
Receiver's total memory: 2842624
Receiver's free memory: 614584
this is just a sample of both receiver and sender's stats. Everything appears to be fine! Hope this message post isn't too long.
Thanks!

File Transfer Protocol

Hi,
For my project, am curretnly storing the files in local xi server directory. We need to ask the client for a FTP server information.
In order to achieve this, is it enough to ask just the file server name and port followed by user name and pwd.
As i have seen some parameters in file communication channel like connect mode and transfer mode, do i need to check these things also.
Just let me know the parameters i need to get it from the client to implement a file sender or receiver communical channel which is of FTP and not NFS.
Regards,
B.Anandh

Hi,
have u read the information provided in link.
●      Connect Mode make it permanent.
○       Permanent
An existing connection to the FTP server is used permanently.
The connection is reestablished automatically if it is lost on the server side.
○       Per File Transfer
A new connection to the FTP server is established for each file transfer.
●      Transfer Mode
Set the FTP connection transfer mode to Text or to Binary.
Thnx
Chirag

Suddenly slow transfer of files between computers over LAN

All, I have the following: HP Desktop, XP Pro, SP3, with Maxtor external HD Dell Laptop, VISTA Business, SP2 Both 32 bit Both running Norton Internet Security 2011, including firewall Linksys WRT54GL router V1.1, connected to DSL The external HD is configured to share over the network. I use it to move files between the twp computers, and to access the Internet. It has been working fine for about 3 years. Everything is still working, except that the speed of transfer, either direction, between the laptop and the external HD has dropped to nearly zero. Files that used to take a minute or so to transfer now literally take hours, and depending on the software, may time out. The problem is not so much the speed over the network, but that the data is only sent in short bursts, with long, many seconds, delays between. As the file progresses, the process gets worse. Typically, it takes as long to send the last 10 % as the first 90%. In the past, the data was sent in a continuous stream. The access between the laptop and the Internet is still fine. I am in a rural area, and have verified that there is no other WiFi to interfere. Using my backup program, I have rolled both my computers back to a time when everything was working. The problem still exists. That seems to point to the router. I have flashed the most recent firmware and reconfigured, but not help. Google turns up lots of hits, but nothing that fits this. Any suggestions on what to do next? For now, I am just swapping the USB drive physically. Alan

Try to reset the router and reconfigure it.
Press and hold the reset button on the router for 30 seconds. Release the reset button and wait for 30 seconds. Power cycle the router and reconfigure it.
Change the MTU size to 1365. Save the settings.
Go to Wireless tab and click on Advanced wireless settings. Change the Beacon Interval to 75, RTS and fragmentation threshold to 2304. Save the settings. Power cycle the router and see if that helps you.
Disable or turn OFF the firewall or Anti-virus software on your computer.

How to optimize Mac file sharing speeds over LAN?

I got a new NetGear R7000, and I find it very fast for LAN transfers wired or wireless between Macs running OS X Mountain Lion or Mavericks. Testing large (multigigabyte) file transfers over AFP, an early 2011 Macbook Pro running Mavericks 10.9.1 connecting to a 2011 Mac Mini running Mountain Lion 10.8.5, Ethernet speeds can hit 6 GB per min (800 Mbps) real world and wireless 2.06 GB / min (273 Mbps), real world performance.
If I perform a similar test for Snow Leopard on both ends, an early 2011 Macbook Pro running Snow Leopard 10.6.8 onnecting to a 2010 Mac Mini also running 10.6.8, has Ethernet transfers topping out at about 1.72 Gigabytes per minute for Ethernet (228 Mbps) and 1.07 GB / min (140 Mbps) for Wifi, real world performance.
I am wondering if there is anything I can do to speed up the Snow Leopard AFP networking. (There are some applications that run only in Snow Leopard and I would like to have it network efficiently instead of getting rid of it. The Macbook Pro has a partitioned drive so I can boot between Snow Leopard and Mavericks.)
I know that Apple made some tweaks in file sharing performance in Mountain Lion 10.8.5, and I suspect TCP IP parameters were altered to speed things up dramatically when there were all the complaints about it being slow on Mac Book Airs with 802.11ac. I am curious what Apple did.
I am wondering if anyone has any tips on how I can improve AFP file sharing performance in Snow Leopard. Are there TCP IP parameters, or plist entries, or other hidden settings I can change? Parameters I can tune in sysctl.conf? I am hoping a real network guru can come on here to advise on some advanced techniques I can use to speed up AFP on Snow Leopard. It is the Macs running Snow Leopard that need to be tuned, not the router, as speeds are very fast sharing between Mountain Lion and Mavericks.
Also, for any/all Mac OS versions, are there networking parameters that I can tune to speed up transfers that involve a very large number of very small files? Even recent versions of OS X slow down greatly on this.
Thanks in advance

Anyone have any ideas? What kind of speed do others see through gigabit Ethernet, with snow leopard or Lion?

How can we use SFTP(SSH File Transfer Protocol) in flex?

Hi All,
Could anyone suggest me how can we transfer files to server using SFTP in flex? Whether it is feasible or not?
Thanks
Rudresh

http://lmgtfy.com/?q=sftp+flex
If you can't get anything to work, you might have success with NativeProcess or another protocol instead...
Harbs

How to use File Transfer Protocol in Java?

hi all,
im new to java. i dont know how to use FTP in java. but i want to transfer files from my machine to another machine and also i want to download files from that machine through FTP. how can i start this program. pls any one give me the code for this program. thanks in advance.

Of course you didn't get an "exact result", since that link was to an article which reviewed several products. If you aren't capable of making a decision based on that article, try using the Apache Commons/Net FTP component.

Bluetooth file transfer protocol

hello everybody....i want to implement PC to PC chat using bluetooth.however,i can implement mobile to PC transfer of messages or files using bluetooth but not between 2 PC's.
can anybody please help me with its coding?

So, you can't do your project so you want us to do it for you? Sorry, not me.

AirPort Extreme (802.11n) File Transfer Speeds Over Ethernet

I tested the transfer time for a 1.33GB file from one computer to another under four conditions. Both computers support gigabit Ethernet, and all cabling is Category 6.
Condition 1: Both computers were directly connected to a pre-gigabit AirPort Extreme Base Station (802.11.n)
The transfer time was 128 seconds.
Condition 2: Both computers were directly connected to an 8-port D-Link DGS-2208 gigabit switch, which in turn was connected to a pre-gigabit AirPort Extreme Base Station (802.11.n)
The transfer time was 72 seconds.
Condition 3: Both computers were directly connected to an 8-port D-Link DGS-2208 gigabit switch, which in turn was connected to a gigabit AirPort Extreme Base Station (802.11.n)
The transfer time was 55 seconds.
Condition 4: Both computers were directly connected to a gigabit AirPort Extreme Base Station (802.11.n)
The transfer time was 28 seconds.
Tentative Conclusions: Using a gigabit switch as the parallel connecting device when the router is pre- or non-gigabit is helpful. Using a gigabit switch as the connecting device when the router is also gigabit is hurtful with respect to transfer time.
I would appreciate any comments.

I re-ran the tests several times, taking care to "pre-warm" the connections by rebooting the router (and the switch when applicable) and making one false start, stopping the first transfer and then starting the timed transfer.
The transfer times when no switch was involved were virtually the same as I reported earlier, with the gigabit router significantly outperforming the pre-gigabit AEBS (it was 5.73 times slower). Interestingly, the transfers via the gigabit switch were virtually as fast as a pure transfer using only the gigabit router.
And there was no difference in the gigabit switch-employed transfer times regardless of whether a pre-gigabit or gigabit router was used. Here is my revised conclusion:
Using a gigabit switch with Apple's pre-gigabit 802.11n router overcomes the slowness associated with a pre-gigabit router provided that pre-warming techniques are employed.

File transfer protocol supported by Cisco infrastructure

We are having issues uploading new endpoint firmware updates to TMS and firmware updates to our VCS-C and VCS-E.
Talking with our network team, FTP is not supported between the network segments I am traversing. They can create some SFTP exceptions, but will the Cisco devices support SFTP?
Thanks for your help.
M Jensen

You'll find that a lot of the devices support SCP rather than SFTP.
You can also use HTTP ot HTTPS to upload the firmware files in to TMS, and to the Infrastrucuture components.
If you use TMS to deploy the software to the endpoints, the endpoints download it via HTTP(s) from your TMS server.
Note: with the more recent versions of TMS you can no longer upgrade VCSes using TMS and they must be done via the browser interface.
Wayne
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Plz hel for file transfer using zmodem protocol

someoe plz help me. i have to devlop an application that transfers files betwn 2 pcs(both ways) using dial up connection, further it should autodial the connection at periodic times.
i am trying to use Zmodem file transfer protocol. i succseed in sending string (for test)using my sender program with hyper terminal open on the other hand. it prints the string. but when i use my receive program, similar to given in samples(simpleread.java) it doesnt work.
actually when the ring comes from the sender how to send command to modem to hang up and connect to the calling pc if there are any such commands then plz help.
----sameer

someoe plz help me. i have to devlop an application
that transfers files betwn 2 pcs(both ways) using dial
up connection, further it should autodial the
connection at periodic times.
i am trying to use Zmodem file transfer protocol. i
succseed in sending string (for test)using my sender
program with hyper terminal open on the other hand. it
prints the string. but when i use my receive program,
similar to given in samples(simpleread.java) it doesnt
work.
actually when the ring comes from the sender how to
send command to modem to hang up and connect to the
calling pc if there are any such commands then plz
help.
----sameerU ddnt abrvt nuf. I r3r1t 4 U.
Sum1 plzz hep m3. i 1/2 2 dvlop app taht xfer fil betwn 2 pcs(bth wys)...

File transfer protocol over LAN

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