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• Unable to setup ssh tunnel on mac

  - by prashant

  On my office windows XP laptop I use a program called Bitvise Tunnelier to establish ssh tunnel to a in-house MySQL database. In the Tunnelier program I also need to provide address of corporate http proxy server in order to establish tunnel. On my personal mac laptop, I use Cisco Anywhere client to establish a VPN connection to my corporate network. But i'm unable to establish ssh tunnel to mysql database using ssh. How do I specify the proxy server address in the ssh command? As additional info when i'm using office laptop (whether in home or office) I can successfully ping to the server address specified in the Tunnelier program. But i cannot ping the same server using my mac machine (even after connecting via VPN). So basically i'm unable to understand what's going on and what steps i can take to debug this problem .

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• Securing data sent to an unencrypted WiFi AP

  - by David Parunakian

  The business plan of a project I'm involved in assumes selling certain WiFi-enabled devices to end users. All these devices originally have an unencrypted connection and a standard SSID. The problem is that although the user can connect to it and set both a new SSID and a WPA passphrase, these are being sent to the AP in plain text and thus can be intercepted by anyone nearby with a sniffer. What's the best solution to this problem, and why? Initially set up an encrypted wireless network at the device and supply the user with a printed passphrase Buy an SSL certificate for the AP's default IP address or local domain name (the APs aren't supposed to work as a router and have a captive portal & dnsmasq installed, so all of them can pretend to be myunit.example.com, as far as I understand) Something different Thank you.

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• Can't SSH to remote server,how to avoid this

  - by snow8261

  From time to time,we suffer problems like we can not remote connect to our server via ssh.So we have to send someone on site to restart the computer for this problem.It causes a lot of pain.The situation is we have to remote connect to our server,which are very important like database server and application server and etc.We have met problems like ssh hang,like command ssh [email protected] with no response. when using ssh -v debug mode, it says : debug1: Connection established. debug1: identity file /.ssh/identity type -1 debug1: identity file /.ssh/id_rsa type -1 debug1: identity file /.ssh/id_dsa type -1 debug1: loaded 3 keys and we met this situation many times with no clue how to solve it.Is any log which can identify this problem? or Is there a tool for this problem? help needed!Any idea are appreciated.

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• ADSL connetion (BSNL dataone) with puppy Linux

  - by Vaibhav Garg

  I have an old PC which I want to use for internet browsing. I tried using Puppy Linux (version 4.3.1) for the same but have not been able to connect. I connect via PPPoE. My network card is RTL 8029b which is automatically detected by Puppy Linux. However, the LED indicator on the MODEM designating LAN connectivity stays off. This post is being typed from the same PC running XP, so there are no connection issues. I am a complete newbie for Linux. can somebody point me to instructions. I will be willing to give any more information if required. P.S. My MODEM is Huewei Smartax MT 882 Thanks

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• x11vnc is slow, but using only 10% of available bandwidth

  - by mmm

  I am using x11vnc over 15Mbit/s network with 20ms latency. When the screen is changing a lot x11vnc is slow - for example when I switch a tab in a browser, it takes almost two seconds until the view is fully redrawn. The strange thing is that max connection speed of x11vnc is even during slow redrawing only about 10% of the available bandwidth. Why is x11vnc not using available bandwidth to speed the redrawing up? For example scp is using 100% of available bandwidth without problems. How can I identify what is the bottleneck for x11vnc on my system? So far I think: 10% network usage = network is not a bottleneck fb read rate: 601 MB/sec = reading fb is not a bottleneck Any ideas how can I further profile x11vnc and find out what is causing a slowdown? For example is there any switch for x11vnc to show how much data it is handling and how long it takes to grab a screen, process and compress it and send it over the network?

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• FTP transfer hangs for random files

  - by hoffmandirt

  I've been stuck on this FTP issue for a while now. I have IIS 7 setup with an IIS 6 FTP server running on a Windows Server 2008 box. The problem I am running into is that I can't download certain files from the FTP server, even though I uploaded those files to the FTP server. The connection times out after 120 seconds. I have used Wireshark and checked the log files. The only message I see is the timeout message. The first thing that came to my mind was permission issues, however I have probably tried every combination of permissions that I can think of, with the end goal of getting the permissions to be the same for the files that work and the files that do not work. With the list of files I have now, I can download the zip, war, and msi files, but not the txt or sql files. It almost seems like a binary thing, but I've changed my transfer mode on the FTP client and also toggled the Active/Passive options around.

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• Windows 7 won't read from NAS on LAN

  - by Alfy

  I've got a Linkstation NAS drive on a local network. Having just got a new laptop with Windows 7 Home Professional, I can no longer read anything of the drive. I've tried accessing the drive using \192.168.1.55\share, using ftp programs such as WinSCP, filezilla and even using firefox to hit ftp://192.168.1.55. The really annoying thing is that through these methods I can see the files on the drive, counting out any kind of connection issues. I can navigate through the NAS file system, but as soon as I try and copy a file off the NAS, things just stop working. Accessing the drive through a Windows XP machine works fine. So far I've tried: Disabling firewalls Adding the LmCompatibilityLevel key to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa Using the 40 - 56 bit encryption instead of the 128 bit. Has anyone got any suggestions of what I can check or try? This is driving me crazy and I'm totally out of ideas?

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• Windows 8 Pro Remote Desktop issue

  - by Mike C.

  I have a weird issue here. I'm running Windows 8 Pro. The client computer is also running Windows 8 Pro. Remote Desktop works when I'm in the same network. I tried connecting using my external IP Address and my DynDNS account, neither works. I disabled Windows Firewall and setup DMZ for my computer on the router, still can't get remote desktop to work. I verified www.canyouseeme.org, port 3389 is open, which is obvious since I'm running DMZ! My ISP, Bell Canada (modem/router: Sagemcom F@st 2864), blocks port 80 and 25, but I don't need those for RDP, do I? The funny thing is RDP rejects the connection instantaneously for my IP or DynDNS while it takes a while for another address. Thank you, Michael

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• Block P2P traffic on a Linksys router WRT54G with tomato firmware

  - by Kami

  Hi, I'm running a small wireless network (6 to 10 users) on a Lynksys WRT54G with tomato firmware sharing an internet connection. I don't want the users to download files with bittorrent (mainly used) and other p2p apps. I've also found some solutions about lowering p2p traffic priority using QoS. I really need to BAN p2p traffic. Does anyone know how to setup some rules to deny that kind of traffic ? I've tried to setup an Access Restriction Rule: But it's not working at all ...

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• How to determine if a device is SATA driven and will be affect by the Sandy Bridge Intel Issue?

  - by joelhaus

  Looking to buy a higher-end Windows 7 laptop, but I'm concerned about the issue with the Intel Sandy Bridge chipset. Otherwise, my price range covers laptops within the latest (Sandy Bridge) generation of the Core i7 family. I understand that there is an issue with SATA ports 2-5 and I use a Windows Home Server over a WiFi connection to share files and backup my PC. The other storage devices that I will use (less frequently) are the built-in DVD-RW disc drive and various devices hooked up to the USB ports (i.e. Android devices, iPod, etc.). The question: Will this setup be negatively impacted by the problem Intel reported about Sandy Bridge? Given this information, is it unwise to purchase a laptop that has this flaw? I really don't know how to determine whether a device is SATA driven or not, so hoping someone can shed some light on this too. Thanks!

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• 11gr2 DataGuard: Restarting DUPLICATE After a Failure

  - by rene.kundersma

  One of the great new features that comes in very handy when databases get larger and larger these days is RMAN's capability to duplicate from an active database and even restart a duplicate when it fails. Imagine yourself the problem I had lately; I used the duplicate from active database feature and had to wait for an hour or 6 before all datafiles where transferred.At the end of the process some error occurred because of the syntax. While this error was easily to solve I was afraid I had to redo the complete procedure and transfer the 2.5 TB again. Well, 11gr2 RMAN surprised when I re-ran my command with the following output: Using previous duplicated file +DATA/fin2prod/datafile/users.2968.719237649 for datafile 12 with checkpoint SCN of 183289288148 Using previous duplicated file +DATA/fin2prod/datafile/users.2703.719237975 for datafile 13 with checkpoint SCN of 183289295823 Above I only show a small snippet, but what happend is that RMAN smartly skipped all files that where already transferred ! The documentation says this: RMAN automatically optimizes a DUPLICATE command that is a repeat of a previously failed DUPLICATE command. The repeat DUPLICATE command notices which datafiles were successfully copied earlier and does not copy them again. This applies to all forms of duplication, whether they are backup-based (with and without a target connection) or active database duplication. The automatic optimization of the DUPLICATE command can be especially useful when a failure occurs during the duplication of very large databases. If a DUPLICATE operation fails, you need only run the DUPLICATE again, using the same parameters contained in the original DUPLICATE command. Please see chapter 23 of the 11g Release 2 Database Backup and Recovery User's Guide for more details. B.w.t. be very careful with the duplicate command. A small mistake in one of the 'convert' parameters can potentially overwrite your target's controlfile without prompting ! Rene Kundersma Technical Architect Oracle Technology Services

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• How to use router QoS?

  - by Nathaniel

  N00b question. How exactly does one use router quality of service settings? I've read up on it a bit but I'm still not exactly sure how to use it. So, my real questions are these: Generally, how does QoS work? How would one use it, say, to guarantee smooth performance in latency sensitive application (cough online gaming cough)? Performance for that sort of stuff bombs out on our connection when somebody is uploading files. I apologize if this is kind of sprawling. Suggestions to clean it up / edits welcome.

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• Database Web Service using Toplink DB Provider

  - by Vishal Jain

  With JDeveloper 11gR2 you can now create database based web services using JAX-WS Provider. The key differences between this and the already existing PL/SQL Web Services support is:Based on JAX-WS ProviderSupports SQL Queries for creating Web ServicesSupports Table CRUD OperationsThis is present as a new option in the New Gallery under 'Web Services'When you invoke the New Gallery option, it present you with three options to choose from:In this entry I will explain the options of creating service based on SQL queries and Table CRUD operations.SQL Query based Service When you select this option, on 'Next' page it asks you for the DB Conn details. You can also choose if you want SOAP 1.1 or 1.2 format. For this example, I will proceed with SOAP 1.1, the default option.On the Next page, you can give the SQL query. The wizard support Bind Variables, so you can parametrize your queries. Give "?" as a input parameter you want to give at runtime, and the "Bind Variables" button will get enabled. Here you can specify the name and type of the variable.Finish the wizard. Now you can test your service in Analyzer:See that the bind variable specified comes as a input parameter in the Analyzer Input Form:CRUD OperationsFor this, At Step 2 of Wizard, select the radio button "Generate Table CRUD Service Provider"At the next step, select the DB Connection and the table for which you want to generate the default set of operations:Finish the Wizard. Now, run the service in Analyzer for a quick check.See that all the basic operations are exposed:

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• tcpdump selective acknowledgements question

  - by wlaus

  Hi All, I eventually sometimes watch most initial tcp connection attempts like this: tcpdump -nn -Z somepcapuser not src host (12x.x5.109.xxx or 62.75.160.xxx ) and not (port 9001 or 443 or 8080 ) and tcp[tcpflags]&(tcp-syn) !=0 and not tcp[tcpflags]& (tcp-ack) !=0 or icmp this works pretty well to quickly identify oddness so far. However, I now have a question on the following output: 03:53:52.227884 IP 203.81.166.20.53786 62.75.160.xxx.80: S 846930886:846930886(0) win 61690 "<"mss 1460,nop,nop,sackOK,opt-178:f04700000000,nop,wscale 4"" I wonder what the marked portion means, haven't seen that before. Thanks for help wlaus

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• pip install fails on guest Linux Mint 15

  - by synergetic

  On my Windows 7 PC, I installed VMware VM for Linux Mint 15. Windows PC is behind corporate firewall /proxy server. Now inside Linux I issued: sudo apt-get install python-virtualenv Then created ~/projects folder and python virtual environment: mkdir projects cd projects virtualenv venv Then activated my virtual env: . venv/bin/activate So far no problem. Then tried to install python libraries, for example markupsafe: pip install markupsafe It throws an error: Cannot fetch index base URL https://pypi.python.org/simple/ Could not find any downloads that satisfy the requirement markupsafe No distributions at all found for markupsafe Storing complete log in /home/me/.pip/pip.log Inside pip.log I found: <urlopen error [Errno 104] Connection reset by peer> Installing any other library throws similar error. What's wrong here?

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• Wake On Lan for Fedora 12

  - by Toymakerii

  I have a fedora 12 box that I am using as a sandbox for web development and a few other toys. The box gets really hot so I would like it to sleep/hibernate when no one is using it, however most of the people connecting to the box will not be able to access it physically. Is it possible to set up a Wake On Lan that wakes up the machine when it detects an SSH connection? A google search didn't yield much information. (or atleast I wasn't smart enough to register it as useful!)

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• Acer Aspire 7739G-6647 won't connect to the internet

  - by Nux

  Acer Aspire 7739G-6647, it belongs to a family member. I reinstalled the chipset, LAN drivers, ethernet controllers, etc. I'm positive it's not my router or modem or anything like that. I have other laptops running on the network, this one just has some strange issue. For some reason, it's saying "Work Offline" is enabled when I open Windows Media Player, and the PC seems to be connected to the network, but on the graphic in networking, it doesn't show the connection between the network and the internet. Could anyone try to state any possible reason for this issue? Any help is appreciated.

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• Problem with Lenovo x200s Wifi under Ubutu Karmic

  - by oneself

  Hi, I have just gotten my Lenovo X200s laptop, and I am install Ubuntu 9.10 Karmic on it. The installation went through without a hitch, but I can't get my wifi to work. lspci | grep Network Produces the following results: 00:19.0 Ethernet controller: Intel Corporation 82567LM Gigabit Network Connection (rev 03) 03:00.0 Network controller: Realtek Semiconductor Co., Ltd. Device 8172 (rev 10) The weird part is that when I turn the wifi hardware stitch on and off on the side of the laptop, I get the following printed in /var/log messages: Dec 30 23:24:48 temp-laptop kernel: [ 213.432302] usb 4-2: USB disconnect, address 2 Dec 30 23:24:52 temp-laptop kernel: [ 217.276310] usb 4-2: new full speed USB device using uhci_hcd and address 3 Dec 30 23:24:52 temp-laptop kernel: [ 217.441759] usb 4-2: configuration #1 chosen from 1 choice Does Ubuntu think my wifi card is a USB device? Am I missing some driver? What can I do to fix this? Please, help!

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• How do I set up failover for a single web server using two ISPs?

  - by Travis

  I have one web server and two WAN connections (1 cable, 1 DSL). DNS is run offsite, and points to the IP address assigned by one of the ISPs. How can I have the second connection take over when the primary one fails? I have seen that it is possible to have two A records, each pointing to a different IP, but it has several problems. What's the real solution to this? I imagine this is a very common issue. Thanks in advance!

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• SOHO NETGEAR wireless router disconnects when downloading torrents

  - by Lirik

  I have a NETGEAR WGT624 router at home which dies when there is a heavy torrent load. I open up my torrent client and it downloads for about 5 to 10 minutes and it continues to increase the number of seeds (goes up to 70-80 seeds), but after that the router simply fails and I have to restart it in order to get an internet connection again. Is there any way that I can fix this? New router firmware? Change some router options? Feed it a cookie? Anything?

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• Cannot enable wireless on an Intel WifiLink 1000 on an Lenovo Ideapad z570

  - by Brij

  I am using the ubuntu 11.10 on lenovo ideapad z570. My wireless internet is not working. I have ensure that wireless switch is on. Windows 7, wireless works great.However ubuntu 11.10 is not allowing me to enable wireless connection. I have run the following command and here is the status. sudo lshw -class network *-network DISABLED description: Wireless interface product: Centrino Wireless-N 1000 vendor: Intel Corporation physical id: 0 bus info: pci@0000:02:00.0 logical name: wlan0 version: 00 serial: 74:e5:0b:1c:a4:a4 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlagn driverversion=3.0.0-12-generic firmware=39.31.5.1 build 35138 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn resources: irq:42 memory:d0500000-d0501fff *-network description: Ethernet interface product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:03:00.0 logical name: eth0 version: 05 serial: f0:de:f1:64:b6:62 size: 10Mbit/s capacity: 100Mbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl_nic/rtl8105e-1.fw latency=0 link=no multicast=yes port=MII speed=10Mbit/s resources: irq:41 ioport:2000(size=256) memory:d0404000-d0404fff memory:d0400000-d0403fff Here is rfkill list all output: rfkill list all 0: ideapad_wlan: Wireless LAN Soft blocked: no Hard blocked: no 1: phy0: Wireless LAN Soft blocked: no Hard blocked: no 2: acer-wireless: Wireless LAN Soft blocked: yes Hard blocked: no Note : Windows 7, wireless card property shows that Intel WifiLink 1000 BGN. Could someone help me to fix this issue.

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• unable to connect gmail and hotmail via telnet

  - by codeomnitrix

  Hey all i am try to connect to gmail and hotmail server via telnet. As: $: telnet smtp.gmail.com 25 Trying 74.125.127.109... Connected to gmail-smtp-msa.l.google.com. Escape character is '^]'. 220 mx.google.com ESMTP j3sm3044317ybe.11 helo 250 mx.google.com at your service 220 2.0.0 Ready to start TLS mail from: [email protected] Connection closed by foreign host. Here codeomnitrix is a user of smtp.localhost.com. And i am running postfix at my system with sitename being smtp.localhost.com. And i am able to sent mail locally from one user to another user but can't send to any other user who is not local. Thanks in advance:)

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• hp pavilion g6 1250 wireless problems

  - by Ahmed Kotb

  i have tried using ubuntu 10.04 and ubuntu 11.10 and both have the same problem the driver is detected by the additional propriety drivers wizard and after installation , ubuntu can't see except on wireless network which is not mine (and i can't connect to it as it is secured) there are plenty of wireless networks around me but ubuntu can't detect them and if i tried to connect to one of them as if it was hidden connection time out. the command lspci -nvn | grep -i net gives 04:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller [14e4:4727] (rev 01) 05:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 05) iwconfig gives lo no wireless extensions. eth0 no wireless extensions. wlan0 IEEE 802.11bgn ESSID:off/any Mode:Managed Access Point: Not-Associated Tx-Power=19 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off i guess it is something related to Broadcom driver .. but i don't know , any help will be appreciated UPDATE: ok i installed a new copy of 11.10 to remove the effect of any trials i have made i followed the link (http://askubuntu.com/q/67806) as suggested all what i have done now is trying the command lsmod | grep brc and it gave me the following brcmsmac 631693 0 brcmutil 17837 1 brcmsmac mac80211 310872 1 brcmsmac cfg80211 199587 2 brcmsmac,mac80211 crc_ccitt 12667 1 brcmsmac then i blacklisted all the other drivers as mentioned in the link the wireless is still disabled.. in the last installation installing the Brodcom STA driver form the additional drivers enabled the menu but as i have said before it wasn't able to connect or even get a list of available networks so what should i do now ? the output of command rfkill list all rfkill list all 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no

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• E-Business Integration with SSO using AccessGate

  - by user774220

  Moving away from the legacy Oracle SSO, Oracle E-Business Suite (EBS) came up with EBS AccessGate as the way forward to provide Single Sign On with Oracle Access Manager (OAM). As opposed to AccessGate in OAM terminology, EBS AccessGate has no specific connection with OAM with respect to configuration. Instead, EBS AccessGate uses the header variables sent from the SSO system to create the native user-session, like any other SSO enabled web application. E-Business Suite Integration with Oracle Access Manager It is a known fact that E-Business suite requires Oracle Internet Directory (OID) as the user repository to enable Single Sign On. This is due to the fact that E-Business Suite needs to be registered with OID to for Single Sign On. Additionally, E-Business Suite uses “orclguid” in OID to map the Single Sign On user with the corresponding local user profile. During authentication, EBS AccessGate expects SSO system to return orclguid and EBS username (stored as a user-attribute in SSO user store) in two header variables USER_ORCLGUID and USER_NAME respectively. Following diagram depicts the authentication flow once SSO system returns EBS Username and orclguid after successful authentication: Topic to brainstorm: EBS AccessGate as a generic SSO enablement solution for E-Business Suite AccessGate Even though EBS AccessGate is suggested as an integration approach between OAM and Oracle E-Business Suite, this section attempts to look at EBS AccessGate as a generic solution approach to provide SSO to Oracle E-Business Suite using any Web SSO solution. From the above points, the only dependency on the SSO system is that it should be able to return the corresponding orclguid from the OID which is configured with the E-Business Suite. This can be achieved by a variety of approaches: By using the same OID referred by E-Business Suite as the Single Sign On user store. If SSO System is using a different user store then: Use DIP or OIM to synch orclsguid from E-Business Suite OID to SSO user store Use OVD to provide an LDAP view where orclguid from E-Business Suite OID is part of the user entity in the user store referred by SSO System

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• SFTP is not connecting to remote server

  - by Crono15

  $ sftp -vvv Remote_IP Connecting to Remote_IP... OpenSSH_5.2p1, OpenSSL 0.9.8r 8 Feb 2011 debug1: Reading configuration data /etc/ssh_config debug2: ssh_connect: needpriv 0 debug1: Connecting to Remote_IP [Remote_IP] port 22. debug1: connect to address Remote_IP port 22: Operation timed out ssh: connect to host Remote_IP port 22: Operation timed out Connection closed I set up an account for SFTP only access with a chroot. I tested that on the server and it works fine. The problem is, I could not get remote SFTP access to the server to work right. The example above is what I keep on running into. I have been trying to figure out how to solve this problem for 2 days now. I am not sure if it have to do with /etc/ssh/sshd_config. Is it something that I am not aware of? I am hoping that you could help point me to the right place for this issue.

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