Red Hat :: How Sftp Protocol Was Designed
Jul 9, 2010
Using CentOS 5.5. I have ssh setup to use a radius server for authentication. When I use filezilla to test sftp I can successfully authenticate and get directory listings, but every time I try to download or upload a file filezilla attempts to re-authenticate which fails because the radius server uses token auth with one time passwords, so the original password used to authenticate is no longer valid. However I can browse directories all I want and it never tries to re-authenticate.
1. is this re-auth just how sftp protocol was designed? like re-auth anytime a user tries a different action, like browse vs download vs upload?
2. or am I just missing something? (very likely, I'm not real experienced with linux)
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May 22, 2010
I downloaded Slackware64-current to give it a try on my laptop and all went well as usual. However when trying to connect to another computer from Dolphin via sftp I was informed that sftp is an 'invalid protocol'. I can use ftp, though. Same thing happens with Konqueror. Using Konsole I can successfully start sftp, although that is not exactly what I want or need. For me, this is really a major problem as my office computer can only be accessed at home via secure shell. I need to be able to upload/download files and folders from there and from other machines. I wasn't really aware of how heavily I depend on this until now. Has anyone else run into this problem? If so, is there a fix or a workaround?
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Apr 13, 2011
i have a vsftpd server running well but i want to make/force all users to use sftp and not just ftp is this possible?
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Mar 28, 2011
If I was to set up a Cluster, I know it wouldn't make much difference to loading up my browser, but would all heavy duty programs (Video Encoders mainly) work with it, or would I need to use programs specifically designed for cluster use?
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Apr 26, 2011
Which is why I'm glad KDE still values the good old desktop paradigm. I'd like to use unity, but unfortunately, it is impossible to customise in any significant fashion. I will be switching to Kubuntu now. I think a "start bar" is the perfect mouse & keyboard GUI paradigm.
My recomendation to the Ubuntu devs is to give unity an option to replace the awkward (for a mouse) application finder with a "start menu", and also give an option to have the old style of task bar as well.
I am not complaining here. like I said, I like KDE and have no problem switching over. The only reason I care about unity is; I don't want somebody to try Ubuntu, find out you can't customise the GUI at all, then go right back over to windows or OSX.
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Apr 13, 2010
I am writing a script that is designed to verify an application is running. The if...else statement in question is the following:
Code:
# Check if <application> is running.
ps -ef |grep <application> > /dev/null
RC=$?
echo $RC
[Code]....
I have started testing by disabling the application in question, and then running the script. The problem that I am seeing is that even though the application is not running, I am getting an output code of 0 due to the successful running of the ps command. What syntax change(s) do I need to make in order to accurately determine when the application is not running?
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Mar 16, 2010
I want to be able to connect these machines to the domain and use active directory on them.
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May 18, 2011
Does linux kernel 2.6 support suid & guid?. I just read somewhere that "latest linux kernels does not support suid & guid as it can pose a security risk if the setuid attribute is assigned to executable programs that are not carefully designed". I need a confirmation about what I say is correct or if not please correct me.
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Jul 24, 2011
As a Windows user, I generated a pair of DSA keys from CoreFTP Lite and sent it to a third party that runs an SFTP server. They told me that a valid DSA key needs to have ssh-dsa at the start and the username@systemname at the end. CoreFTP generated neither the ssh-dsa header nor the username@systemname footer. I tried with WinSCP and it didn't generate them either. Is there a difference between how SFTP works between Windows and Linux? If I put a useraccount@systemname at the end of the text will it work? How would the Linux system validate that my system is called "systemname"? If it can't validate, what is the purpose of adding it?
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Jan 24, 2010
I tried to build several packages designed for slackware 13 at slackbuilds. Those was a simple apps like ardour, audacity for example.
[Code]...
My CPU is AMD Phenom 9550 Quad core. It supports 64 bit. My os is slackware 13_64. What do I need to change in slackbuild to create a txz package for those apps?
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May 5, 2011
Has someone using opensource SPICE [URL] wit WIN7 Prof. desktop across the low 2 Mbps WAN with 50ms latency? BTW we're using VMware View 4.6 Desktop with WIN7 Prof. (PCoIP) and have a lot performance problems across the WAN.
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Jan 16, 2011
So what I'm trying to do is write a USB stack for a uC, but beyond the 10 ms reset signals from the host I'm kind of lost. What happens after that? If someone could point me somewhere that explains it step by step in detail, instead of jumping around
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Nov 25, 2010
I was trying to install a new protocol under ns2-34 when I execute make command, I got this error :
In file included from ./config.h:60,
from ./routing/address.h:38,
from ant/ant.cc:4:
/usr/local/include/tclcl.h:42: fatal error: tcl.h: Aucun fichier ou dossier de ce type
compilation terminated.
make: *** [ant/ant.o] Erreur 1
I can't find this tcl.h !! I don't know how to add this file !
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Apr 13, 2016
I have Debian 8.4.0 with gnome gdm3 and NVIDIA GeForce 8400 GS. When I run some applications the following message appears:
Code: Select allname of display: :0
X Error of failed request: BadValue (integer parameter out of range for operation)
Major opcode of failed request: 155 (GLX)
Minor opcode of failed request: 24 (X_GLXCreateNewContext)
Value in failed request: 0x0
Serial number of failed request: 33
Current serial number in output stream: 34
Previously, I had lightgdm instead of gdm3 and I fixed this problem allowing indirect GLX protocol just setting xserver-command=X -core +iglx in /usr/ share/lightdm/lightdm.conf.d/50-xserver-command.conf...Now I can't allog GLX protocol. I have tried the following:
Set Option "AllowIndirectGLXProtocol" "On" in xorg.conf Set serverargs="+iglx" in /usr/bin/startx Set exec /usr/bin/X in /etc/X11/xinit/xserverrc
Despite all this, the error message persists and xorg.0.log indicates that indirect GLX is disabled (line 19.477):
Code: Select all[ 17.604]
X.Org X Server 1.16.4
Release Date: 2014-12-20
[ 17.604] X Protocol Version 11, Revision 0
[ 17.604] Build Operating System: Linux 3.16.0-4-amd64 x86_64 Debian
[ 17.604] Current Operating System: Linux federueda-pc 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt25-1 (2016-03-06) x86_64
[ 17.604] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.16.0-4-amd64 root=UUID=4156658f-15d7-43ae-b0ff-2dfc7484c3ab ro quiet
[code]...
In short, I don't find the way to enable indirect GLX in gdm3.
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Jul 12, 2011
We are running in to a issue where we don't seem to get our bridging to work as we expected. Meaning passing all traffic from Point A to Point B. As explained below:
[Code]...
This is the original connection. Now we are adding our Linux IP impairment box for IP tables in between Application Server A and Router X so the figure would look as below: Application Server A --> IP Impairment box --> Router X --> router Y --> Application Server B
The issue we are having is When a packets are sent from Server A to Server B they are going through for PING, TCP, UDP, but for BGP the connection is established at a TCP level (SYN, SYN-ACK, ACK), but the BGP OPEN packet does not get through and our BGP relation ship does not come up between Application Server A and B. Application Server A and B are a routers also but there are applications running on those router. BGP is underlying protocol used for Application Server A to be talking with Application Server B and getting routes for each other.
Even with the iptables empty (all rules default ACCEPT) we still can't seem to get these BGP OPEN's through. We see both sides of the application servers sending BGP OPEN's, but the Linux bridge never passes those packets to the other side of the bridge. Tracking the BGP packets, we see the packets at iptables raw PREROUTING and filter FORWARD tables but the packet doesn't get out the other interface.
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Jul 10, 2010
I've been struggling this morning trying to associate an application with a custom protocol, namely emacsclient and org-protocol.
I'm calling this protocol from a webbrowser bookmarklet, and I get the following behaviour :
In chromium, the "Launch Application" dialog comes up, and calls xdg-open org-protocol://... which ends up firing a new chromium frame.
In firefox, I've tried setting network.protocol-handler.app.org-protocol to an empty string or my emacsclient path, anyhow I get the following error message : "Firefox doesn't know how to open this address, because the protocol (org-protocol) isn't associated with any program" without even showing any external application selection dialog.
I'm not using any desktop environment, so I need to make this work strictly with xdg, however, despite reading the shared mime info spec etc, I still can't fathom a working configuration.
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Jun 23, 2010
I installed ubuntu server 10.04 32-bit and I installed XRDP so I can connect to it using RDP sessions. I was wondering if there is a better alternative to it. I have the following issues with it: 1. When I connect to the server locally using rdp it works just fine the first time. Then when I close the session I cannot connect to it again (it says connection timed out). Then if I uninstall then reinstall it will work again for another time then do the same thing. 2. I receive a protocol error when using Windows 7 or RDP version 6.1.7600 (Newest RDP version)
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Jun 11, 2011
I have linux running on a cd rom, whenever I need to start linux on my computer i just insert the cd. however I want to copy a dhcp protocol from my users folder from my computer to the linux cd rom. The name of the dhcp protocol file on my computer is /users/bennett/downloads/dualserverv6.83, soI am wondering how do I do this when I'm running the linux software from cd rom from the same pc.
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Jul 29, 2009
i'm new in linux world i would like to know how can i add the rtp protocol to my iptables rule for Netfilter firewall,but without installing the asterisk server
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Jun 11, 2011
I have linux running from a cd rom when I need to start linux. I have the dhcp program on my computer and I need to save it to the cd rom with the linux system on it. The dhcp program is in my /users/bennett/downloads/dualserverinstallationv6.83 folder. So how do I get ths save to my linux system on the cd rom so I can use it in Voiphopper.
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Feb 23, 2011
i needed to implement leach protocol in ns2using linux redhat but i need the codes for leach protocol
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Apr 18, 2011
I use ns-2.34 and I have a simple script and I want to use the xcp on it.
My script is:
Code:
In ns-2.34 there are a script which name is xcp-tcp.tcl.
I understand this scenario but I cant modify my script to work like this.
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Jul 30, 2011
finding the best protocol for my server's file sharing. I will use this with 3 macs running 10.4.11 , one running 10.6.8, and one running 10.7 AND 10.6.7 AND Ubuntu 11.04. My server is going to be running Gentoo. I also need something where i can access it over the internet(and I'm using dyndns for my internet access(acessing from a outside machine)) with encryption and little hassle. I need the ability to be able to mount in finder and multiple users to be able to open a file.
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Dec 12, 2008
I'd like VOIP that works. VOIP is essential for my work, video would be very, very nice for keeping in touch with loved ones (keeping in touch with little nieces as they grow up, that kind of thing). It would be nice to get Skype working, but a more open alternative would be good too. Skype worked fine with Mandriva 2008.0, I couldn't get it working with acceptable sound quality in 2008. 1 in spite of following instructions. Now it seems broken in 2009.0 too, with no clear instructions on how to make it work - I just don't want to get into another vortex. Especially since, as I now discover, Skype does not support the open "SIP" VOIP protocol.
I gather that MSN & Yahoo both do support it, and Google Talk supports other protocols for text (not sure about voice) so I could connect through Ekiga, for example. I just set up Ekiga Softphone - don't know if it will work, but it's asked me to set up port forwarding without giving me the first clue of how to do it or which ports to forward. I'm also thinking about changing to Debian - I want a distro that lets me configure it at install, setting up the system to be very light and fast. (I'm not really a Linux Geek, but at least I figure Debian should be well documented, and stable and fast enough to make it worth the trouble.) Does that affect my choice of VOIP?
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Feb 9, 2011
I developed a protocol "it's a modification of OLSR" for wireless networks, it was with JAVA and I try to simulate it on NS2, I used AgentJ, so in the TCL I did any thing like usual;
set val(chan) Channel/WirelessChannel ;# channel type
set val(prop)Propagation/TwoRayGround ;# radio-propagation model
set val(netif) Phy/WirelessPhy ;# network interface type
[code]....
and I didn't specified the protocol because I attached my nodes to the JAVA class responsible for the protocol, but when I run it generates errors, it claims the protocol to use, so I don't know how proceeding.
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Jul 17, 2011
There is a protocol in use - for example when I use Firefox to do a query through Google - as I type into the search field the browser sends my characters - one at a time - to the server. As I recall, at one time I found the specification but I'm pulling a blank. As I recall it does a POST of each character as I enter it, and the server responds before I have entered a <CR>. I want to write a client side program that uses that protocol and need to see the spec.
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Apr 4, 2010
How to add new patch for leach protocol in ns2.34 in ubuntu9.10
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Mar 14, 2011
In my workplace, I can't update Centos using http protocol, but, it's possible with ftp (I tried with Debian and it's work). How to configure the repositories in Centos 5.5, to download the packages by FTP?
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Aug 14, 2010
I'm not that new to Linux having used a few other distros but at the same time i am not really 'clued up' and can quickly get stuck. My problem is trying to get an IM program to work with my MSN account. I use this just to keep in touch with family/friends. Pidgin, doesn't seem to have an option to add an MSN account at all. I installed Empathy after using it in Fedora which gave me an option to setup a MSN account but it doesn't connect?
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Mar 31, 2011
once again banging the head against a brick wall, entered the following commands in to client and server, but get the above message on both, is there something wrong with the script, or thw computers? mount 192.168.1.68:/export/shared /mnt/nfs_on_debian
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