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  • Creating a ssh tunnel to transfer files?

    - by Vincent
    For me, networks are a very "opaque" thing, and even with reading a lot of tutorial about SSH, I do not understand how to create a basic tunnel to transfer my files. The configuration is the following : My Computer --[Internet]--> Bridge Machine --[Local Network]--> Final Machine Currently I do the following : 1) Connect to the Bridge Machine with : ssh -X [email protected] 2) Connect to the Final Machine with : ssh -X username@finalmachine 3) I copy the address of files I need (for example .../mydirectory) 4) Then I deconnect from the finalmachine with : exit 5) I copy the files to the bridge : scp -r username@finalmachine:/.../mydirectory . 6) I deconnect from the bridge with : exit 7) I copy the files to my machine : scp -r [email protected]:/.../mydirectory . Which is quite complicated. My question is basic : how to simplify this using a SSH tunnel ? (and please explain me the signification of each command line you write, to understand what each line really do and to avoid to use it like a magical thing. Furthermore if some ports number are used, explain me if I can pick a completely random number or if I have to choose a specific one.)

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  • Filtered Router Interface

    - by jviotti
    I'm having some problems with a Scientific-Atlanta DPR2320R2. In specific with the WIFI. A few months ago I changed its password and username and now I can't remember. So I tried cracking it with Hydra but it drove things worse. Content of webadmin was rendered partial, and threw lot of errors. I then reseted the router. I found myself abled to browse the web with ethernet-connected pc. Wifi is configured by registering the device's MAC Address, and indeed the router has been reseted and register MAC address were lost. No device could connect to wifi. In fact, the device does not even recognize the network. I tried the pointing to 192.168.0.1 to restablish the MAC's. But I couldn't connect to the router access point. Tried listing up hosts: $ nmap -sP 192.168.0.0/24 Starting Nmap 5.00 ( http://nmap.org ) at 2012-12-11 01:18 ART Host 192.168.0.1 is up (0.0018s latency). Host 192.168.0.11 is up (0.00025s latency). Nmap done: 256 IP addresses (2 hosts up) scanned in 59.62 seconds Then checked 192.168.0.1 was really up by sending pings. It responded to all my pings. I quick-scanned the access point: $ nmap 192.168.0.1 Starting Nmap 5.00 ( http://nmap.org ) at 2012-12-11 01:08 ART Interesting ports on 192.168.0.1: Not shown: 999 closed ports PORT STATE SERVICE 80/tcp filtered http Nmap done: 1 IP address (1 host up) scanned in 6.73 seconds Look the state of the port 80: FILTERED. I'm pretty confused now. Any suggestion would be appreciated. Thanks in advance.

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  • On Windows XP, Start > Run "My Documents" sometimes doesn't work

    - by Clayton Hughes
    On all of my home computers, I can enter "my documents" into the Start Run prompt and the My Documents folder of the current profile will open up. What's more, I can continue typing subfolders, files, etc. and auto-complete works and it's smart and enjoyable. I can't check at the moment, but I'm almost positive entries like "My Pictures" and "My Music" also go to their correct folders. On my work computers, if I enter "my documents" into the Start Run prompt, I get the following error: "Windows cannot find 'my'. Make sure you typed the name correctly, and then try again. To search for a file, click the Start Button, and then click Search." I can sort of circumvent this by creating a shortcut in my PATH named 'my' that points to My Documents folder, but this doesn't solve the auto-complete option (and it's otherwise imperfect, of course, because "my pictures" or "my music" all direct to the same place. A google search doesn't provide much help on this, although it does identify a poster in 2007 with this same question at another board: http://www.msfn.org/board/lofiversion/index.php/t124813.html (Login required, but Google cache available here: http://preview.tinyurl.com/ygxhwwl) Is this just a limitation of the networks belonging to a domain, or is there some way I can get this functionality back? My documents folder does live in the standard place (C:\Documents and Settings{username}\My Documents), and not on a network drive or anything. It's probably worth adding that the computers are part of some freakish Novell domain thing, too. I'm not in IT here so I'm not too up on the details. Thanks for any help/suggestions!

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  • 1 document pending in printer queue in System Tray that won't go away

    - by White Phoenix
    Edit: I didn't want to do it, but I restarted my computer - cleared the problem right away. Though if I were running a Windows 2003/2008 server, I would hate to have to restart the domain controller just to get rid of this irritating problem. If I run into this problem again, I'm going to try that remove printer/reinstall printer thing. Thanks for your help @Psychogeek. Points for your attempt. Running Windows 7, 32-bit Professional. My printer is an HP OfficeJet Wireless 8500. It's connected to my network wirelessly through TCP/IP as a standalone device. I was having some print problems awhile back and had to do some print spooler stuff as part of my troubleshooting (stopping the Print Spooler service, clearing the print spooler files from C:\Windows\System32\spool\PRINTERS and then restarting the service). I've finally narrowed it down to it being application specific, so that's that. However, as a leftover from all that troubleshooting, my printer icon is stuck in the tray - when I mouseover the icon, Windows says that there is 1 document(s) pending for my username. However, when I open up that printer's queue, there's nothing in there. I restarted the Printer Spooler service and also checked C:\Windows\System32\spool\PRINTERS if there's anything in there - nothing. I did a quick Google search and an answer from one of those "reps" at the Microsoft Socialnet site says for me to uninstall and reinstall the printer. The funny thing is, when I send print jobs, they print just fine - that 1 mystery document stuck in queue isn't stopping anything from happening. Short of having to do that, are there any other quick troubleshooting steps I may be missing?

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  • Accounting setup in freeradius with mikrotik and the "always" module

    - by Matt
    I have a freeradius setup that is being used to provide authentication for users on a wireless network. The access points are all Mikrotik hardware and the users are connected 24/7. We've been using Daloradius with mysql and freeradius 2. The boss wants to use the accounting information and while this is all set up and appears to be working, I've found that not all the accounting information is present. Since our users may be connected for more than 24 hours at a time we keep this in here, it will reset some attributes daily so that the accounting packets work correctly. So he started poking around at this link: http://wiki.mikrotik.com/wiki/RouterOs_MySql_Freeradius#Configuring_RouterOs_for_Radius_.26_PPP.2A_AAA And was looking specifically at the following section. Since our users may be connected for more than 24 hours at a time we keep this in here, it will reset some attributes daily so that the accounting packets work correctly always fail { rcode = fail } always reject { rcode = reject } always ok { rcode = ok simulcount = 0 mpp = no } However, that link references freeradius 1 and I can't find this in the radius.conf file for freeradius 2. What does it do and could it be a reason I'm missing data? EDIT: I have found one issue. We have a backup freeradius server that is also receiving the accounting packets. Although they are replicating, it's only a master/slave configuration. If the slave receives accounting packets it won't replicate them back to the master. Although I suspect this might solve it, the boss is not convinced due to the always module. Is there anything special I need to configure in the mikrotik AP's or freeradius 2 for clients connected 24/7.

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  • Vyatta masquerade out bridge interface

    - by miquella
    We have set up a Vyatta Core 6.1 gateway on our network with three interfaces: eth0 - 1.1.1.1 - public gateway/router IP (to public upstream router) eth1 - 2.2.2.1/24 - public subnet (connected to a second firewall 2.2.2.2) eth2 - 10.10.0.1/24 - private subnet Our ISP provided the 1.1.1.1 address for us to use as our gateway. The 2.2.2.1 address is so the other firewall (2.2.2.2) can communicate to this gateway which then routes the traffic out through the eth0 interface. Here is our current configuration: interfaces { bridge br100 { address 2.2.2.1/24 } ethernet eth0 { address 1.1.1.1/30 vif 100 { bridge-group { bridge br100 } } } ethernet eth1 { bridge-group { bridge br100 } } ethernet eth2 { address 10.10.0.1/24 } loopback lo { } } service { nat { rule 100 { outbound-interface eth0 source { address 10.10.0.1/24 } type masquerade } } } With this configuration, it routes everything, but the source address after masquerading is 1.1.1.1, which is correct, because that's the interface it's bound to. But because of some of our requirements here, we need it to source from the 2.2.2.1 address instead (what's the point of paying for a class C public subnet if the only address we can send from is our gateway!?). I've tried binding to br100 instead of eth0, but it doesn't seem to route anything if I do that. I imagine I'm just missing something simple. Any thoughts?

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  • Are Colocation Cross Connects Worth While

    - by SvrGuy
    We currently operate three clusters of collocated machines in different data centers. Recently, I became aware that our newest data center will offer to cross connect us to a bandwidth provider free of charge. In the past, I never really investigated a cross connect for bandwidth because I figured that the rates would be similar to what we are paying the colo now and that it would reduce our resiliency (because we would only be using one or two carriers for IP, where as the colo uses, say 8 different providers). Then I saw an ad for hurricane electric internet services (http://he.net/cgi-bin/ip_transit_quote) that gave a price for IP transit at $1/Mbs, which is much better than the $30/Mb we pay for the blended bandwidth. What are people out there typically paying for bandwith via cross connect and how hard is to setup? Is my understanding that what you do is open agreemetns with two or three ISPs, cross connect to them and then configure your top of rack router on their network. Can you really get IP transit down to a couple of dollars per megabit per month just by doing the routing yourself? Or, is my understanding of cross connection fundamentally wrong?

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  • Downloading Python 2.5.4 (from official website) in order to install it

    - by brilliant
    I was quite hesitant about whether I should post this question here on "StackOverflow" or on "SuperUser", but finally decided to post it here as Python is more a programming language rather than a piece of software. I've been recently using Python 2.5.4 that is installed on my computer, but at the moment I am not at home (and won't be for about two weeks from now), so I need to install the same version of Python on another computer. This computer has Windows XP installed – just like the one that I have at home. The reason why I need Python 2.5.4 is because I am using “Google App Engine”, and I was told that it only supports Python 2.5 However, when I went to the official Python page for the download, I discovered that certain things have changed, and I don’t quite remember where exactly from that site I had downloaded Python 2.5.4 on my computer at home. I found this page: http://www.python.org/download/releases/2.5.4/ Here is how it looks: (If you can’t see it here, please check it out at this address: http://brad.cwahi.net/some_pictures/python_page.jpg ) A few things here are not clear to me. It says: For x86 processors: python-2.5.4.msi For Win64-Itanium users: python-2.5.4.ia64.msi For Win64-AMD64 users: python-2.5.4.amd64.msi First of all, I don’t know what processor I am using – whether mine is “x86” or not; and also, I don’t know whether I am an “Win64-Itanium” or an “Win64-AMD64” user. Are Itanium and AMD64 also processors? Later it says: Windows XP and later already have MSI; many older machines will already have MSI installed. I guess, it is my case, but then I am totally puzzled as to which link I should click as it seems now that I don’t need those three previous links (as MSI is already installed on Windows XP), but there is no fourth link provided for those who use “Windows XP” or older machines. Of course, there are these words after that: Windows users may also be interested in Mark Hammond's win32all package, available from Sourceforge. but it seems to me that it is something additional rather than the main file. So, my question is simple: Where in the official Python website I can download Python 2.5.4, precisely, which link I should click?

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  • VPN with client-to-client direct connectivity?

    - by Johannes Ernst
    When setting up a VPN, clients (say client1 and client2) usually authenticate to a server, and together the three constitute the VPN. When client1 wishes to send a packet to client2, this packet usually gets routed by way of server. Are there products / configuration blueprints for products where it is possible to send packets directly from client1 to client2 without going though server? (if the underlying network topology permits it, e.g. no firewalls in the way) If not, is there a way by which client1 can send a packet to client2 by way of server, without the server being able to snoop on the content of the packet? (E.g. because the packet is encrypted with the public key of client2) I just asked in the OpenVPN forum, and the answer I got was "not with OpenVPN". So my question is: are there other products with which this is possible? Open-source preferred ... One use case: client1 and client2, typically in separate offices, find themselves both at headquarters. Do they still need to talk to each other via the public internet? Links appreciated. Thank you.

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  • High load without explanation

    - by Sebastian
    I have a very high load on my machine and don't know what is responsible or how to find out. On the machine runs a jboss appserver and mysql. Here is a top from the user at peak time: top - 16:23:01 up 101 days, 6:50, 1 user, load average: 23.42, 21.53, 24.73 Tasks: 9 total, 1 running, 8 sleeping, 0 stopped, 0 zombie Cpu(s): 17.2%us, 1.6%sy, 0.0%ni, 80.4%id, 0.1%wa, 0.1%hi, 0.7%si, 0.0%st Mem: 16440784k total, 16263720k used, 177064k free, 151916k buffers Swap: 16780872k total, 30428k used, 16750444k free, 8963648k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 27344 b 40 0 16.0g 6.5g 14m S 169 41.7 1184:09 java 6047 b 40 0 11484 1232 1228 S 0 0.0 0:00.01 mysqld_safe 6192 b 40 0 604m 182m 4696 S 0 1.1 93:30.40 mysqld 7948 b 40 0 84036 1968 1176 S 0 0.0 0:00.07 sshd 7949 b 40 0 14004 2900 1608 S 0 0.0 0:00.03 bash 7975 b 40 0 8604 1044 840 S 0 0.0 0:00.44 top The CPU usage of the java process is normal. The peaks only show up when i deployed a certain web application. Could the resulting network traffic boost the load in such way that i don't see it in top?

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  • Shared printer stops working on clients but not host computer

    - by Tony
    I have a Brother MFC-7420 USB all-in-one laser printer. It is plugin via USB to my Windows 7 x64 machine. I have it shared to a few users on my home network. My wife's laptop running Vista x64 can normally print fine to the printer. However it seems that every day or two, when she pushes print on a something it just sits in her laptop's print queue and never makes it to my desktop. The only thing that seems to fix this is if she restarts her laptop. Not a big deal but this problem is sort of annoying. I don't know if this affects but the laptop is put into hibernate at night and I turn my desktop off at night. Does anyone know why this happens and if there is something easy to do to fix the problem besides restart the computer? EDIT: I was thinking that maybe my wife's laptop loses its connection to the printer. Is there a way to reset a connection to a shared printer? Or maybe reauth with the printer?

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  • PNP4Nagios, nagiosgraph, separate Cacti, or something else for Nagios trending

    - by Matt
    I've been using Nagios for a while now and recently started using Cacti after being dissatisfied with the lack of scaling and lack of any GUI in MRTG. I'm interested in adding trending to my Nagios installation and wondered what was the best route to go. I've looked around a bit and have seen what's available, but there's not a lot of information around to differentiate them from each other. My Nagios install has about 250 hosts and 1100 service checks, but many of them are just simple network devices and there's only about 20 servers and 300 services associated with them. All servers but 2 are running Windows Server 2003. What are the main highlights of PNP4Nagios vs. nagiosgraph, or would I be better off using some sort of tool to convert the data to RRD form and just view it directly in Cacti? Is there a completely different direction I could go that would be even better? Please comment if you need any more information, I tend to be too wordy and tried to keep this question brief. Thanks!

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  • Connect over WiFi to SQL Server from another computer

    - by Bronzato
    I tried to connect over WiFi to SQL Server with SQL Server Management Studio from another computer, but it failed. I have a computer with Windows 7 & SQL Server 2008 (lets say the server computer). Next to it I have a freshly installed computer with Windows 7 & SQL Server Management Studio (let's say the client computer). What I did on the server computer: Configure firewall by enabling port 1433 Enabled network protocols (TCP/IP) inside SQL Server Configuration Manager Checked Allow remote connections to this server in server properties in the SQL Server Management application. Started SQL Server Browser Restarted services (SQL Server Browser is stopped at this point, but I don't think it is necessary. Is it?) Next, I successfully tested a ping on the port 1433 from my client computer with a tool named tcping (ex: tcping 192.168.1.4 1433). But I still cannot connect from my client computer to SQL Server on my server computer. Ok, something new with this problem: Until now, I successfully connected to my "server computer" with Management Studio. What I did is type the computer name in the server name field in the connection window of Management Studio. My previous (failed) attempt was to type the computer name followed by the instance of SQL server (ex: COMPUTER_NAME\SQL2008). I don't know why I only have to type the computer name. Now my new challenge is to be successful in connecting my VB6 application to this remote database located on my "server computer". I have a connection string for this but it failed to connect. Here is my connection string: "Provider=SQLOLEDB.1;Password=mypassword;User ID=sa;Initial Catalog=TPB;Data Source=THIERRY-HP\SQL2008" Any idea what's going wrong?

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  • SQL Server Analysis Services, DNS, AD, Kerberos, Connection Issues

    - by ScaleOvenStove
    Running into a very weird issue. Converting servers to Windows 2008/SQL 2008. Have a server, SERVER_A, brand new, setup with Win2k8,Sql2k8 - works. Have a Server SERVER_B, running Windows2003/SQL2005. I want to migrate from SERVER_B to SERVER_A. I have all db's, cubes, etc setup on SERVER_A and it is mimicking functionality. Since users are using Excel to connect to SSAS, they connection string has SERVER_B in it. What I want to do, is, change DNS on the network to point SERVER_B (by name) at the ip of SERVER_A. I have successfully done this with another server, SERVER_C, but I need to do it with SERVER_B. What I have found is that with SERVER_C, after changing DNS, had to remove SERVER_C from AD and then it worked. I could connect to SERVER_C (DB), SERVER_C (SSAS Default Instance) and SERVER_C (SSAS Named instance) and it all was actually connecting to SERVER_A I tried to do the same with with SERVER_B, and no luck. Changed DNS, removed from AD, and it wouldn't connect. Found out that there were some SPN's in AD set up, so removed those and tried again. I then could connect to SERVER_B (DB), SERVER_B (SSAS Named Instance), but not SERVER_B (SSAS Default Instance). I could connect to SERVER_B (SSAS Default Intance WITH the Port #), but I need to be able to connect without the port number. I am at a loss to as why I can't connect to the default instance without a port #. Not sure if it is SPN's in AD, or another AD issue, or something else. Pretty sure it isnt something on the server (because SERVER_C works!) Any insight or suggestions would be greatly helpful!!

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  • How to edit files directly on webdav in windows.

    - by phazei
    I have a webDAV setup with the cPanel webdisk. I can connect to it through NetHood and I can drag and drop files to/from there. What I can't do is simply edit any of the files directly. I need to copy it somewhere else, edit it, then copy it back. That's essentially what is needed with ftp, though smart clients will monitor the file, making it easier than webDAV in the current state I'm using it in. I was under the impression that webdav was supposed to let me work on the files as if it were a local drive. But nothing can actually open the files. How can I go about bringing more functionality around to it? Or is this as good as it gets? I have tried 'net use q:\ https://myserver.com:2078' and 'net use q:\ '\myserver.com@SSL:2078\' but neither work and only throws: "System error 67 has occurred. The network name cannot be found." I ultimately want to use TortiseSVN with the webDAV so I can have my working copy running on the server.

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  • VoIP setup for one external PSTN line

    - by Jcl
    I'm completely new to VoIP and the likes, and I'm trying to find information about what could be the best setup for this. I need 4 (maybe more in the future, but maximum 5 or 6) wireless extensions, connected to 1 PSTN line, and maybe 2 in the future. I've been trying to gather information about the gear needed but everything I find seems too much over-the-top (and extremely expensive). The main problem is that the physical place we are on doesn't have possibilities of having a decent internet connection, so using a external VoIP "virtual PBX" is not an option. Thing is, even if small, phone is critical to this organization. I currently have an analog DECT/GAP PBX which does what I need, however the PBX is very bad and the call quality is horrible, and that's why I want to change it. The requirements would be: 4 wireless terminals (routing cable is not an option), all of them ringing on incoming PSTN calls. Ability to do internal calls (4 separate offices) and ability to pass calls between terminals. The 4 terminals should be able to access the external PSTN line without dialing any special codes. Very important: terminals should be able to issue commands on the PSTN line to the external operator in the form *nn*nnnnnnnn# . Don't know wether this could face to be a problem, but I've had problems with analog PBX which would take any * as a PBX command and wouldn't allow terminals to send it to the external lines. Not so important, but would be nice to have: call waiting music Could anyone recommend such a setup? I need to be able to do this on a EXTREMELY LIMITED budget (that is: I don't have a limit, but all should get as much to zero as possible). I have enough spare powerful computers and a 300mbps wireless network which works just fine, so that's not to include in the budget. Don't really know if this is the best place to ask, but it's the most StackExchange-related site I've found to this subject.

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  • Service Unavailable - App Pool disabled error...anyone know why?

    - by andy
    Hi guys A small number of our sites intermediately experience an error that is a mystery to us. Our set up is: Windows Server 2003 IIS6 .NET 3.5 We have about 35 Websites running on IIS Each site has it's own App Pool Each App Pool has the identity: Network Service The symptom is: The Application Pool for a site stops, and when you browse to the site, you only see: SERVICE UNAVAILABLE In the Event Logs, we have one Error, that looks like this: Application pool 'AppPool1' is being automatically disabled due to a series of failures in the process(es) serving that application pool. And we have several Warnings leading up to the error, that look like this (note: the warnings look the same, except for the process id): A process serving application pool 'AppPool1' suffered a fatal communication error with the World Wide Web Publishing Service. The process id was '292'. The data field contains the error number. What's causing this? As I said, it doeasn't happen very often....the last time was about 6 months ago...and it usually happens with the same site/App pool. Any ideas? cheers!

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  • kickstart ks.cfg: Where should 'url' point?

    - by Stefan Lasiewski
    I have a kickstart file (ks.cfg) on a floppy (Old style). I am trying to install CentOS 5.4. The top of my ks.cfg says this: install # Install from local cdrom or over the network. #cdrom url --url http://kickstart.example.org/pub/centos/5.4/ On the Apache server side, this command is failing with these 404s: kickstart.example.org 192.168.16.180 - - [01/Jun/2010:17:24:30 -0700] "GET /pub/centos/5.4///disc1/.discinfo HTTP/1.1" 404 314 "-" "urlgrabber/3.1.0" kickstart.example.org 192.168.16.180 - - [01/Jun/2010:17:24:43 -0700] "GET /pub/centos/5.4/repodata/repomd.xml HTTP/1.1" 404 316 "-" "urlgrabber/3.1.0 yum/3.2.22" It seems that the value of my url doesn't match the directory structure on the server. I swear this worked a few months ago. Someone else maintains the Yum repository, and they say nothing has changed. What should the value of url URL be? Should this only include the OS (/pub/centos/5.4/), or should it include the architecture (/pub/centos/5.4/os/x86_64 )? I see that Kickstart is trying to grab a file called 'repomd.xml', but why is it looking in '/pub/centos/5.4/repodata/repomd.xml', when these files actually exist at '/pub/centos/5.4/os/x86_64/repodata/repomd.xml' and other locations at '/pub/centos/5.4/*/$ARCH/repodata/repomd.xml'? I don't see this documented or explained well in the [RedHat 5 Installation Guide1]

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  • Using IIS7 as a reverse proxy

    - by Jon
    My question is pretty much identical to the question listed but they did not get an answer as they ended up using Linux as the reverse proxy. http://serverfault.com/questions/55309/using-iis7-as-a-reverse-proxy I need to have IIS the main site and linux (Apache) being the proxied site(s). so I have site1.com (IIS7) site2.com (Linux Apache) they have subdomains of sub1.site1.com sub2.site1.com sub3.site2.com I want all traffic to go to site1.com and to say anything that is site2.com should be proxied to linux box on internal network, (believe ARR can do this but not sure how). I can not have it running as Apache doing the proxying as I need IIS exposed directly. any and all advice would be great. EDIT I think this might help me: <rule name="Canonical Host Name" stopProcessing="true"> <match url="(.*)" /> <conditions> <add input="{HTTP_HOST}" negate="true" pattern="^cto\.com$" /> <add input="{HTTP_HOST}" negate="true" pattern="^antoniochagoury\.com$" /> <add input="{HTTP_HOST}" negate="true" pattern="www.antoniochagoury\.com$" /> </conditions> <action type="Redirect" url="http://www.cto20.com/{R:1}" redirectType="Permanent" /> </rule> from: http://www.cto20.com/post/Tips-Tricks-3-URL-Rewriting-Rules-Everyone-Should-Use.aspx I will have a look at this when I have access to the IIS7 box. Thanks

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  • Why does just splitting an Ethernet cable not work?

    - by Sin Jeong-hun
    I thought the Ethernet is logically a one-line communication bus (for argument's sake, I am excluding hubs). All machines attached on the bus hears the same signals and the machines themselves try to avoid collisions by randomly backing off. http://computer.howstuffworks.com/ethernet6.htm If so, why would splitting one Ethernet line from my home router into two and connecting two computers not work? Why do I have to add a switch to it? *What the Internet said would not work. [4 port home router] ------[one Ethernet cable]-----[simple splitter]======[two computers] *What the Internet said I should do [4 port home router] ------[one Ethernet cable]-----[switch]======[two computers] Is this because of the signal degradation (reduced electric current)? Thank you for all the answers! The reason why I did not just use the two ports of my home router is... The 4-port gigabit router is in my room, and I had put a computer in another room (also my room, though). Since a wired network is far more reliable and secure, I had bought a long Ethernet cable and and connected the computer to the router. Now I was thinking about adding another computer to that room. I could buy another long Ethernet cable, but then there will be two cables between the rooms. The one line already is a minor annoyance, so I thought if I could share the one line between the two computers in that room. A switch would work, but it requires power and is a little bit pricey. That is why I wondered why it would not work to simply split the physical Ethernet cable. Apparently I do not completely understand how Ethernet and a switch work. I just have some bit of knowledge I heard in my college class.

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  • Lose internet connection, yet online games continue

    - by Mike
    For the past week or so, my internet connection has been anything but stable. Restarting my modem/router always fixes the problems, but since it has occurred so often, I'm noticing confusing patterns which I was hoping someone could help answer. My internet connection kicks out about 4-5 times a day. The sure-fire way to fix it is to restart my all-in-one modem/router. Sometimes I can diagnose the problem on my laptop which resets my wireless network adapter and fixes the problem, but not always. If that doesn't fix the problem, it usually reports that the connection between the modem and internet is the problem which requires a restart of the router. The odd thing which baffles me is that my connection is supposedly lost such that no browsers can connect to sites, yet things like online games still continue to play without issue. How is this possible? I thought maybe the game was running locally on my PC but that couldn't be the answer because I was still getting messages from other players. So my real question is: How can my internet browsers (firefox, chrome, even IE) lose connection to the internet, but other applications like online games not? Am I actually losing connection or am I mistaken? Edit: I'd also like to add that netflix on my PS3 which is directly connected to the same access point will also lose connection. So internet browsers and netflix lose their internet connection while online games continue without an issue.

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  • Accidentally mounted a ReiserFS drive as MBR on my windows box - how do I recover?

    - by Ryan
    I had a WD Netcenter with a 160GB drive that kept dropping off the network. I opened up the enclosure and removed the hard drive, connected to a Windows box without knowing the drive used ReiserFS.... When mounting on the Windows box, I chose "MBR" as filesystem. 70GB of data corrupted: 90% of data is word documents, excel spreadsheets, and jpg's - all mission critical. Attempted recovery on Linux box (ubuntu) using TestDisk: I could see the container, but couldn't get anything out – according to TestDisk this was because I chose "none" as filesystem. Attempted recovery using Nucleus Kernel Recovery for windows: 98% of what was recovered is incomplete and/or unusable. I need to know if a way exists to recover or rebuild original ReiserFS MBR, or what tools/techniques might give me the best results in recovering the data. Found a Windows version of TestDisk and I ran it yesterday - here are the results: TestDisk 6.14-WIP, Data Recovery Utility, May 2012 Christophe GRENIER <[email protected]> http://www.cgsecurity.org Disk /dev/sda - 160 GB / 149 GiB - CHS 19457 255 63 The harddisk (160 GB / 149 GiB) seems too small! (< 519 GB / 483 GiB) Check the harddisk size: HD jumpers settings, BIOS detection... The following partitions can't be recovered: Partition Start End Size in sectors > ReiserFS 3.6 62 241 8 19458 0 18 311581568 ReiserFS 3.6 62 248 55 19458 8 2 311581568 ReiserFS 3.6 62 254 37 19458 13 47 311581568 ReiserFS 3.6 63 6 28 19458 20 38 311581568 ReiserFS 3.6 63 13 11 19458 27 21 311581568 ReiserFS 3.6 63 21 43 19458 35 53 311581568 ReiserFS 3.6 63 27 41 19458 41 51 311581568 ReiserFS 3.6 63 37 35 19458 51 45 311581568 ReiserFS 3.6 63 54 20 19458 68 30 311581568 ReiserFS 3.6 63 76 26 19458 90 36 311581568

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  • rsync over ssh backup failing after relocation of server

    - by OlduvaiHand
    I've got two FreeBSD machines set up; one serves video data and the other is the backup for the first. At this point I've got around 4TB of data. I add files to the video server a few at a time, and was planning to use rsync over ssh to keep the backup machine up to date. I did the initial, large backup with both machines hooked up to the same subnet at the lab with no problems using rsync. Then, when I moved the backup machine off-site (but still on the university network), I attempted a sync without changing anything other than the IP (as the machine is now on a different subnet) and got the following error: 2010/03/22 15:55:21 [1260] rsync: connection unexpectedly closed (6340840244 bytes received so far) [receiver] 2010/03/22 15:55:21 [1260] rsync error: error in rsync protocol data stream (code 12) at io.c(601) [receiver=3.0.7] 2010/03/22 15:55:21 [1258] rsync: connection unexpectedly closed (60 bytes received so far) [generator] 2010/03/22 15:55:21 [1258] rsync error: unexplained error (code 255) at io.c(601) [generator=3.0.7] The script that handles the backup hasn't been changed, nor has the crontab that invokes it. Does anyone have any ideas about what might be causing the hiccup? I was under the impression that it might have something to do with the ssh connection timing out or something along those lines, but am not entirely clear on how to diagnose the cause of the problem.

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  • VMware ARP/Mac Networking

    - by Ross Wilson
    Hi Guys, I am very interested in how VMware networking works. I have scoured the VMware website and read their data sheets, this has given me some basic knowledge. I now have some questions. Lets assume that we have a physical server running the VMware hypervisor. The physical server is running a Virtual Machine. The physical box has one physical NIC. The NIC is connected to a switch, as so is a desktop client. Now, this is where my first question lies. The VM has an IP address: 192.168.1.1. How do desktop clients on the network communicate with this VM? So, the client pings 192.168.1.1. The ping packet is sent to the switch. The switch checks its MAC address table and sees that 192.168.1.1 is associated with the MAC address of the physical NIC. Correct? I then assume that the ping packet is sent to the server's physical NIC, where the hypervisor routes the packet to the VM thats using 192.168.1.1? Please could you give me a run down as to how VM networking works? Many thanks, Ross

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  • Simple end-to-end load and bottleneck monitoring for DB-based web sites

    - by T.J. Crowder
    What tools do you use / would you recommend for monitoring a Linux-based, DB-based website's servers for bottlenecks and load? The obvious goal being to know when growth has gotten to the point where it's necessary to scale up (or out) one or more of the bits and pieces because the current system won't be managing the load if an observed trend continues. I'm looking for general recommendations based on standard Linux load metrics, disk I/O metrics, network I/O metrics, etc., but if specifics are helpful: It'll be Tomcat6 using APR (possibly with a Varnish or similar caching and balancing front-end), MySQL, and either Ubuntu 8.04 LTS or 10.04 LTS depending on timing. I know about top, vmstat, iostat, bwmon and the like that collect and parse info from the /proc file system (et. al.); and obviously MySQL provides a lot of queriable performance information. I could use those directly, probably automating periodic monitoring logs with scripts and such. But I have a suspicion that I'd be reinventing a wheel... For example, Hyperic HQ seems to be along the lines of what I'm looking for. Others? Meta: I tend to think of "recommendation" questions as needing to be CW because there's no one right answer, but I see a lot of these here that aren't CWs, so I haven't marked it as one. I'll happily do so if enough people think I should.

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