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• SSH tunnel doesn't work

  - by s1ck

  I am trying to use my server as a "proxy" with ssh. However, setting up tunneling with ssh -D localhost:8000 user@myserver does not work. I tested this on various machines with ssh and putty - It connects just fine, but when I set my browser settings accordingly, I just get an error "Connection has been reset". I tried monitoring the traffic with wireshark, but I didn't even see some tunnel-traffic. I explicitly set AllowTcpForwarding to "yes" but I still can't use the tunnel. When running ssh in verbose mode, I don't get any errors but debug1: Connection to port 8000 forwarding to socks port 0 requested. debug1: channel 3: new [dynamic-tcpip] debug1: channel 3: free: dynamic-tcpip, nchannels 4 What am I doing wrong?

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• parallel vms in VMWare Server - how to configure network so they can ping each other?

  - by IronGoofy

  I'm using VMWare Server (currently on Version 1.0.7) and have two VMs that I would like to run at the same time. However, I'm having problems in setting them up so they can ping each other. I've configured them to use 'Bridged' networking. They both obtain an IP address from the DHCP server on my network, but after that they can't ping each other. It seems that only the first one has a functioning network connection (I can ping it from the host machine and Internet connection works), but the other one does not. If it helps, both VMs are running XP SP 3. Any ideas? Thanks!

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• What's the best way to forward traffic on a specific port to another machine?

  - by Ankit

  The setup I have is this: [client01] <-A-> [server01] <-B-> [server02] client01 can access port 9300 on server01 (connection A). server01 can access port 9300 on server02 (connection B). What's the best way to make all traffic on port 9300 to server01 go to port 9300 on server02? I can successfully do this with an ssh tunnel from client01 to server01 to server02, but I don't want to have to run ssh on client01. When I ssh from server01 to server02 forwarding port 9300 (ssh -g -L9300:localhost:9300 server02 on server01), it doesn't work -- am I using the wrong command?

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• How to specify the order of startup scripts (CLI)?

  - by bcsteeve

  Startup really confuses me. It seems various methods for starting things happen in different locations all over the place. But is there a way to define the order they are loaded? Specifically... I have an issue where Plex Media Server (PMS) can't be discovered by clients if the server's VPN connection is established prior PMS starting. It was driving me nuts, but I discovered that I could solve the problem by shutting down PMS, shutting down the VPN, turning on PMS and then turning on VPN. I'm not exactly sure how PMS auto-loads itself at startup, but the VPN is something I defined by editing: /etc/network/if-up.d/slickvpn with the following: #! /bin/bash REQUIRED_CONNECTION_NAME="Wired connection 1" VPN_CONNECTION_NAME="myvpn" activ_con=$(nmcli con status | grep "${REQUIRED_CONNECTION_NAME}") activ_vpn=$(nmcli con status | grep "${VPN_CONNECTION_NAME}") if [ "${activ_con}" -a ! "${activ_vpn}" ]; then nmcli con up id "${VPN_CONNECTION_NAME}" fi That's a script I found somewhere (I think on this site) when looking for help autoconnecting a VPN. So I guess /etc/network/if-up.d/ scripts are initiated prior to the PMS service. How can I flip that? Or other solution?

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• How to know which protocol is used in data transfer and inspect that data?

  - by user37880

  I've a .net application for windows. This application transfers a lot of data to and from a particular server on a fix port no 8888. I tried 'Tcpview' but couldn't figure out anything useful. I only figured that it uses 'tcp' connection. Is there a way to know which protocol is used for data transfer (I think port no 8888 is not specific port so not helpful)? How exactly my machine makes connection to this server? Is it telnet/http etc or what? How can I inspect the actual data which is being transferred? If data is encrypted, is it possible to know encryption method on client side (without reverse engineering)? Thanks.

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• Speedup of fixing an openssl bug with 8192 bit key [on hold]

  - by rubo77

  This is related to this Bug-Report https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=747453 OpenSSL contains a set of arbitrary limitations on the size of accepted key parameters that make unrelated software fail to establish secure connections. The problem was found while debugging a XMPP s2s connection issue where two servers with long certificate keys (8192 Bit RSA) failed to establish a secure connection because OpenSSL rejected the handshake. This seems to be a small problem to be fixed but although there is an easy patch available to fix the issue in that bug report, no reactions are noticed so far.. The last patch that broke the 2048 barrier took 2 years to be implemented and only resulted in an increase to 4096bit, which seems to be a bad joke. Where would we have to report this to speed up the implementation for such an issue?

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• 2 RJ45 connectors on a one WAN cable

  - by mr_stavo

  Hello, I encountered strange setup on a network at company where I do some work. They have internet connection from small ISP located in the same building, all I see is one CAT5 cable with 2 RJ45 connectors. One is going to WAN port on the router and another into LAN port on the same router. This is the only way for internet connection to work. I tried to connect my laptop to one of the RJ45 but it won't work. Now, what is the purpose for such setup?

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• Configuring network to set wlan0 as primary

  - by Sheed

  I recently had to rebuild my pc and decided to go for ubuntu 14.04. I think the mistake I made was I started from a 12.04 install disk instead of the 12.10 disk I'd used previously and when given the option set my primary connection as ethernet (because the wireless option didn't work). After upgrading to 14.04 etc, I managed to get the wireless working, or more using steps like ifconfig -a and the likes I managed to prove that the wireless card etc. is all installed and working. However every time I boot without a hard wired connection plugged in I get the message "waiting for network configuration". I can then once it's booted without a network get my wirless working using sudo ifconfig wlan0 up iwlist wlan0 scan This seems to kick the wireless module into life and it appears in the GUI and I can then select a network, however all the options like edit network and disconnect etc are all greyed out. What I would like of course is if the WLAN0 was just set as my primary default network so I've been looking for a solution to this and it would seem that I need to adjust the old /etc/network/interfaces file but when I try to do so using the sudo vi /etc/network/interfaces command I, well I simply have no idea what I'm doing. Other than that typing :q! gets me out of there before I do to much damage! As far as I can tell (by navigating to the file in the GUI) the output of my /etc/network/interfaces is as follows: (obviously not including the " in each line that's just to break the heading rule of the #) "# This file describes the network interfaces available on your system "# and how to activate them. For more information, see interfaces(5). "# The loopback network interface auto lo iface lo inet loopback "# The primary network interface auto eth0 iface eth0 inet dhcp If this is the case then this clearly doesn't contain what it should do but I don't how to fix it. Nor do I even know if I'm on the right track. Any help would be appreciated thanks :)

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• VPN (PPTP) in Virtual Machine (WinXP in VM Workstation 8 )

  - by user1059617

  i am trying to establish a VPN Connection in my GuestOS. But i get a timeout every Time. The Host : Win 7 The Guest: WinXp Software: VM-Workstation 8 The GuestOS is bridged to the Host network and has his own IP. The normal Connection in the GuestOS works fine but when i try to establish the VPN (no Programm used , just simple Windows VPN) i get an timeout? But i can establish the VPN from the Host without any problems... Any Ideas here? Thanks Ps:(If it matters: The VPN is PPTP from StrongVPN)

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• Windows Server VPN: Error 720

  - by Nikita Zernov

  I want to created vpn server on Windows Server 2012. First I installed Active Directory domain services, then Remote Access server role. Opened Gettng Started Wizard, entered configure just vpn. Then in Routing and Remote access selected Configure and Enable Routing and Remote Access. There selected custom configuration, vpn. Then created user in active directory and allowed network access permission. After this I tried to connect to vpn from windows 8. I get the following error: Error 720: A connection t the remote computer could not be established. You might need to change the network settings for this connection. What should I do?

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• Two routers in a LAN

  - by taxi

  router A no wifi +--- pc01 +--- pc02 | +--- router B wifi +--- pc03 +--- printer In my LAN I have a modem-router (say A) (no wifi connection) acting as DHCP server, and connected to the Internet. Now, I want to add another router (say B) (with wifi connection) to the LAN, in order to connect wifi pc's and net printers. Here I would disable DCHP server functionality. Is it correct to connect router B to router A via an ethernet port? In router A I define an IP address (eg 192.168.1.100) to be assigned to router B (MAC address). I expect to see router B listed as an attached device, in router A's status, but on the contrary it is not listed.

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• Can one use Airport (Time Capsule) with an external DHCP server?

  - by DNS

  I currently share my DSL connection using a wireless router with DHCP disabled, and dnsmasq running on a Mac Mini serving DHCP & DNS. This setup is important because I have clients doing PXE boot, and I need the control over DHCP that dnsmasq provides. There is also a Time Capsule on the network that's used purely as a backup device; its wireless functions are disabled. The wireless router is starting to get a little flaky, and since it doesn't support 802.11n I'd like to replace it. Rather than buying a new router, I'd like to just use the Time Capsule. But I see no way to disable its DHCP server; when I set the connection type to PPPoE, it insists on serving DHCP. Is there any way to use Airport PPPoE with a DHCP server elsewhere on the network?

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• Can't connect to ssh after nfs problem

  - by MihaiM

  Hello, I had a problem yesterday with a server that lost connection (S1). From that server, there was a dir shared with NFS to another one (S2), no homedir and not in $PATH, but a dir to store old files for archiving. S1 was back online after a few hours, but now I cannot access S2 because of this (and I'm sure it's because of that because all other services are running without any problem). The ssh connection hangs here: debug1: Entering interactive session. I know a reboot will do the job, but considering this is the NAS of a big app, my bosses will kill me if I do it. Is there any other way to get over this? I tried with different users, but all of them hang in the same place. I connected with HP iLO and not even there I cannot use my username. Thanks in advance.

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• How to control routes added by RasDial

  - by Robert Dodier

  I am using the RasDial function on a Windows box (Windows Server 2008) to dial a device from which the server then reads data. It seems that some new routes are added to the network routing table when the dial-up connection is made. That interferes with other network interfaces on the server. In particular, RasDial adds a default route which routes traffic to the device, which makes the server unreachable until the connection is dropped. Is there a way to control which routes are added by RasDial? I have been studying Microsoft's document for RasDial and associated items (RASDIALPARAMS, RASDIALEXTENSIONS) without finding anything about routing. There is an option for "Use default gateway on remote network" when configuring a VPN, but I don't see how to apply that in this case. Thanks for any light you can shed on this problem.

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• How to run Medisoft Patient Accounting Demo on Windows 7?

  - by John

  I installed Medisoft Patient Accounting Demo but every time I try to run it, I get this error: tblExclusiveNew: One of the Database property or the AdsConnection property must have a value. I click OK and then get this error: Exception AdsConnectionError in module MW.EXE at 001FA701. Must specify connection string before getting a server connection. The program then immediately exits. Then a get this error: Ar3import -An error has occurred dmIPCCommunication: No core product found I click close and then: Ar3import-An error has occurred An unspecified error has occurred, please call tech support Googling was no help. Even the Medisoft tech on the Medisoft forum thread I found was unable to fix it. Is this fixable?

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• Store passwords in putty

  - by Quintin Par

  How can I store my connection passwords in putty?

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• View Webserver Form Internal and Extenal

  - by Just4Net

  We have a web server hosted out of our office, and it works fine when people access the site from outside the office. The problem is that when people are inside the office and go to the website (www.example.com) it's very slow, as it goes out over the internet and comes back in. Or LAN is Windows with Active Directory and our web server is CentOS with its own internet connection. How can I set when users in my office want see website opens it from local network instead of going out of one internet connection and back in through the other?

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• IIS is not accepting connections after WIndows system update

  - by user78102

  I've been running a web site for the past year on Windows Home Server 2008 R2. After the March 2012 system updates, the site is no longer accessible to clients. They see this error: website is online but isn't accepting connections. Ping tests to the FQDN of the server are successful and NSLOOKUP returns the correct result. The Internet connection tests out good from the server. I have not changed my internet connection (Comcast Business Internet) or my router configuration (I forward incoming requests from the outside to port 80 of the local IP address of the server). I have tried: Disabling the Windows Firewall. Rebuilding the OS and configuration. I still have the problem. How can I resolve this?

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• Network randomly drops

  - by user147661

  I have a VPS, ubuntu server 12.04 and for unknown reasons the network connection drops and I have to access my vps via the console and ifdown eth0 and ifup eth0. This brings the connection back up from about a few seconds to a few hours. I have run tail -F /var/log/syslog to monitor the log to see what happens at the point of drop and there is nothing unusual. The vps is running under virt-manager and the hardware is set to virtio. I have had linux friends look at my vps and they are unsure of what is the cause.

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• Configure a warning when starting an application on Windows

  - by Guy

  I have some software that's licensed to be used on one computer at a time. It connects to a service and retrieves data from that service. If I start the application on a second computer then the first computer's data connection is terminated. There are times when I'll be running the software on Computer1 and it's doing some vital work with its data collection etc. and I'll forget that it's running there and start it on Computer2 causing Computer1's data connection to terminate etc. What I want to do is configure a warning on Computer2 so that each time I start this application it pops up a dialog box and says "Hey, this software might be running on another computer, are you sure you want to start it here?" I'm using Windows 7 on Computer2. Is there anyway for me to accomplish this task?

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• Is there a way to edit an existing nautilus (file manager) bookmark?

  - by C.W.Holeman II

  Is there a way to edit an existing nautilus (fie manager) bookmark? Invoke from Linux command line: $ nautilus Activate connection editor: File>Connect To Server...> Complete entries in the pop up: Service Type: [WebDAV (HTTP)] Server: [localhost] Port: [8001] Folder [webdav] Username: [test] [x] Add bookmark Bookmark name: [/dav] <Connect> Then in the left column of the main window the new connection and bookmark exist: Places ------------------- ausername Desktop File System Network WebDAV on localhost Trash -------------------- /dav Right click on "/dav" pop up menu: Open Open in New Tab Open in New Window ------------------ Remove Rename... There is no option for editing.

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• Can I install Ubuntu 13.10 without the internet?

  - by user1526570

  I'm new to Ubuntu and Linux in general. I'm currently out of town and the dorm I am living in has terrible internet connection. It won't be another 2-3 weeks before I can go home and have proper internet connection. So my question is whether or not I can install Ubuntu 13.10 in my laptop without the internet and then do the updates once I go home? Also, I'm attempting to do a dual boot with my Lenovo G505s which was pre-installed with Windows 8. Hopefully I can pull this off. I already did the necessary things (I think and hope so) prior to installation: Disable secure boot Enable legacy and boot UEFI first Create partition Put installer in my pen drive As I am quite new to this, any advice would be of great help. Thanks in advance! EDIT: I tried yesterday. The installation asked me to connect to the internet, so I used my crappy dorm internet. When it reached the downloading/installtion of Ubuntu One, it just stopped and went on forever. So I had to stop it.

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• A lot of connections to port 6881 - some new attacks or what ?

  - by stoleto

  Ok so i am the admin of a small network with a web server and only the web server has a direct connection to the internet, the rest of the network are connecting through another place. I was inspecting the traffic on the server with tcpdump, and i found a LOT of connections from different IP addresses to port 6881. All ports on my machine are blocked except those who are really needed for a web server (like port 80), so i checked it out and confirmed that 6881 and the rest ports are in filtered(firewalled) state. Why all those ips are continuously trying to make connection to the server on port 6881 no matter it's not open at all ? Is this some new kind of attack or maybe there's some new exploit (maybe 0day?) for some service running on 6881 ? AFAIK on 6881 operate the bittorrent and similar, so really, what's the deal ? It would be nice if someone clarifies me some things.

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• Mac Terminal - Color Co-ordinated

  - by Biscuit128

  I would like to create a couple of short cuts on my iMac which ssh on to my dev box and on to my prod box. I would like my dev connection to use the settings something similar to home-brew (green text black background) and my prod connection to use red text black background) - How can this be configured so that this is possible. Would I need multiple bashrc files one for prod and one for dev and source individually? If this is the case, how can i get the profiles to be sources as soon as i double click the shortcuts? Thanks

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• My microphone is too quiet

  - by AmitM9S6

  I've been chatting with skype for a long time.. and I don't know why, but for X time it's fine, and then it's too quiet.. Here how it goes : I'm booting the PC - getting into a skype call with friends - talking with friends on skype - (everything goes well) - Closing the skype call - Going back to a skype call like a hour after -. They can't hear me well, I have to shout so they'll hear me, and in the settings, it's on 100% + 30 DECIBELS, so I can't raise it higher... and if I'll re-boot my PC, it'll be well until I'll close the skype call again.. Every time I'm skyping with friends well, and then when I close the call and come back after a while, they hear me really low(volume).. I've been trying to fix this problem for about 2 months! If you'll be able to help me, I'd be so happy. (btw It's connected not through USB, but through a microphone connection and headphone connection...) Also, I got Windows 7..

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