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  • Is PLC speed affected by mixing different devices?

    - by CFP
    Hello everyone! At home, I have 4 PLC devices for my home network. Two of them are 85Mb/s powerlan PLC adapters, while the others are 10Mbps powerlan PLC adapters. I have not been able to determine reliably whether the presence of the 10Mb/s ones impact on the speed of the 85Mb/s ones. Is it possible that the bitrate is limited by the slowest devices on the network? Thanks!

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  • Home Network Speed Control

    - by DanSpd
    I have a home network installed in following way: Internet<-server<-switch<-computers,etc Server has DHCP server installed and I would like to be able to limit download&upload speed for each client connected to server via switch. Anyone can suggest good free software to do that? Thanks

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  • Internet Speed for Webserver

    - by René
    That should be kind of dumb question in comparison to all other questions here. What minimum upload and download is required for a small home webserver with one webpage? Or is there a schema that shows me the required upload and download speed for a number of visitors? We talk about a Windows Server, but not really sure this is relevant. That's just for a practice project.

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  • Determining speed (class) of USB on PC

    - by Thomas Matthews
    Is there a method for determining the speed of a USB port on a Windows XP PC, without using a USB protocol analyzer? I'm looking for something simple, such as looking at the Device Manager. I would like to hook up some USB equipment to a USB 2.0 port, rather than the slower USB 1.0 or 1.1.

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  • What is more important for speed: Processor Speed or RAM?

    - by Jake
    I am about to buy a desktop, I narrowed it down to two choices, both are virtually identical (even in terms of price) but one has 4 GB of RAM and a 3.7 GHZ CPU the other has 8GB of RAM and a 2.7 GHZ CPU Which is the better choice for speed? Also as a side question, what is better: a 2GB stick of DDR2 RAM or a 4GB stick of DDR3?

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  • Bizarre and very specific Internet connection loss

    - by Synetech
    Yesterday (Friday, September 21, 2012), my Internet connection started acting up. After some testing, I confirmed a very specific and baffling set of symptoms: Internet connection goes away every 25-35 minutes (I did not confirm the exact interval, but it seems to be about 30 mins.) Only some protocols are affected; HTTP*, P2P, etc. stop working; FTP, etc. continue to work When it’s stopped, cannot even ping router or cable-modem IPs or view their firmware pages Domain-names and IPs are irrelevant (for protocols that stop working, neither work, for those that still work, both work) Resetting router fixes it for another 30 minutes Keeping the connection idle or active doesn’t seem to make a difference (nor the bandwidth usage in that period) Connecting directly to cable-modem allows it to work indefinitely Disconnecting the router from the cable-modem works indefinitely (no Internet connection obviously, but can still access router IP and firmware page) Connecting the router to the cable-modem, but putting the modem on standby also works indefinitely Same problem with both a wireless laptop and wired (on any port) desktop (both Windows 7; will try to test Windows XP when possible) Nothing had changed in the days leading up to the issue. No modifications to the networking configuration or the router; there were not even any Windows updates except for an MSSE definition update. Waiting does not fix it, nor does any amount of fiddling with anything; only resetting the router fixes it for 30 minutes (resetting the cable-modem doesn't work either) I tried cleaning the pins in the router’s plugs, but that didn’t help, which was not really a surprise since I was not getting a lost connection error. Obviously my first thought was that the router was having a problem, and this is borne out by some tests. The problem is that when it drops, it is not a full drop since I can still do things like ftp ftp.mcafee.com and such which means that the connection and DNS are still working. Moreover, if it were the router, then why does it stay alive indefinitely when not connected to the cable-modem (i.e., no outside influence)? The problem doesn't seem to be either the cable-modem nor the router, but rather an interaction between the two, like something from the outside (port scan? hacker? ISP?) that is triggering a problem in the router. I see that there have been a couple of vulnerabilities for the DI-524, but those were a while back and should be fixed since I have the last firmware for it. I don’t think it’s my ISP (Rogers) since I have been using the router for several years without problem and can connect indefinitely when bypassing it. But I can’t rule them out since that is one of the only possible things that could have suddenly changed. Does anybody have any ideas of explanations, fixed, or tests? (I note that when I opened the router, I heard a very high-pitched noise from somewhere near the capacitors/ferrite ring which I don’t think I heard the last time I opened it a few years ago, but then if it were that, then why would it affect only a very small, specific set of functions?)

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  • Why is my connection slow?

    - by Jay R.
    I have a Dell Precision T5400 with a Broadcom 1Gb onboard NIC. For some strange reason, when I access machines on our local network, the best I can get is around 125KB/s download speed. My laptop that has a 10/100Mb NIC onboard usually gets around 300KB/s or better from the same network resource. Both machines are plugged into the same 1Gb switch which connects to our local network wall jack at 100Mb half duplex. There is also a printer plugged into the same switch at 100Mb full. The resource I'm using for the test is a 30MB zip file copied from a jetty webserver that is running as part of a cruisecontrol installation. The cruisecontrol installation is running WindowsXP with full real-time antivirus and Altiris patch management and inventory running. That stuff on its own is eating some of the download speed. I've seen the laptop reach into the multiple MB/s download speed before, but the desktop never seems to get past 125KB/s to 130KB/s. In WindowsXP, before I upgraded the driver in the desktop, it was that slow. In Fedora, it is still slow even though it appears to be using the same driver version as the upgraded Windows driver. The upgraded Windows driver is faster, but still not nearly as fast as the laptop. What gives? Any insight to improve the situation would be appreciated. Could it be that the BroadCom board just isn't that good, or the driver in linux is just not as good as the Windows one?

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  • Out of nowhere, ssh_exchange_identification: Connection closed by remote hot me too

    - by dgerman
    See similar: Out of nowhere, ssh_exchange_identification: Connection closed by remote host Today, 6/19/12 attempting to ssh to the same host as usual ssh replied ssh_exchange_identification: Connection closed by remote host two additional attempts failed ssh -v $RWS OpenSSH_5.6p1, OpenSSL 0.9.8r 8 Feb 2011 debug1: Reading configuration data /etc/ssh_config debug1: Applying options for * debug1: Connecting to Real-World-Systems.com [174.127.119.33] port 22. debug1: Connection established. debug1: identity file /Users/dgerman/.ssh/id_rsa type 1 debug1: identity file /Users/dgerman/.ssh/id_rsa-cert type -1 debug1: identity file /Users/dgerman/.ssh/id_dsa type -1 debug1: identity file /Users/dgerman/.ssh/id_dsa-cert type -1 ssh_exchange_identification: Connection closed by remote host ping host was successful, ftp host was successful, ssh now successful, ssh -v $RWS OpenSSH_5.6p1, OpenSSL 0.9.8r 8 Feb 2011 debug1: Reading configuration data /etc/ssh_config debug1: Applying options for * debug1: Connecting to Real-World-Systems.com [174.127.119.33] port 22. debug1: Connection established. debug1: identity file /Users/dgerman/.ssh/id_rsa type 1 debug1: identity file /Users/dgerman/.ssh/id_rsa-cert type -1 debug1: identity file /Users/dgerman/.ssh/id_dsa type -1 debug1: identity file /Users/dgerman/.ssh/id_dsa-cert type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_4.3 debug1: match: OpenSSH_4.3 pat OpenSSH_4* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.6 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-ctr hmac-md5 none debug1: kex: client->server aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Host 'real-world-systems.com' is known and matches the RSA host key. debug1: Found key in /Users/dgerman/.ssh/known_hosts:5 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: Roaming not allowed by server debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,gssapi-with-mic,password debug1: Next authentication method: publickey debug1: Offering RSA public key: /Users/dgerman/.ssh/id_rsa debug1: Authentications that can continue: publickey,gssapi-with-mic,password debug1: Trying private key: /Users/dgerman/.ssh/id_dsa debug1: Next authentication method: password ++++ What gives?? +++++++++++ Mac OS X 10.4.7 , OpenSSH_5.6p1, OpenSSL 0.9.8r 8 Feb 2011, /Users/dgerman/.ssh > ls -la total 24 drwx------ 7 dgerman staff 238 Jun 19 15:46 . drwxr-xr-x 389 dgerman staff 13226 Jun 19 15:46 .. -rw------- 1 dgerman staff 1766 Feb 26 18:25 id_rsa -rw-r--r-- 1 dgerman staff 400 Feb 26 18:25 id_rsa.pub -rw-r--r-- 1 dgerman staff 67 Feb 26 18:27 keyfingerprint -rw-r--r-- 1 dgerman staff 6215 May 1 08:11 known_hosts -rw-r--r-- 1 dgerman staff 220 Feb 26 18:26 randomart

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  • getting Error while set up the connection pool in jboss

    - by Yashwant Chavan
    Hi as per following Connection pool configuration facing some issue. Place a copy of mysql-connector-java-[version]-bin.jar in $JBOSS_HOME/server/all/lib. Then, follow the example configuration file named mysql-ds.xml in the $JBOSS_HOME/docs/examples/jca directory that comes with a JBoss binary installation. To activate your DataSource, place an xml file that follows the format of mysql-ds.xml in the deploy subdirectory in either $JBOSS_HOME/server/all, $JBOSS_HOME/server/default, or $JBOSS_HOME/server/[yourconfig] as appropriate. I am getting following error resource-ref: jdbc/buinessCaliberDb has no valid JNDI binding. Check the jboss-web/resource-ref. This is my mysql-ds.xml <datasources> <local-tx-datasource> <jndi-name>jdbc/buinessCaliberDb</jndi-name> <connection-url>jdbc:mysql:///BUSINESS</connection-url> <driver-class>com.mysql.jdbc.Driver</driver-class> <user-name>root</user-name> <password>password</password> <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name> <!-- should only be used on drivers after 3.22.1 with "ping" support <valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLValidConnectionChecker</valid-connection-checker-class-name> --> <!-- sql to call when connection is created <new-connection-sql>some arbitrary sql</new-connection-sql> --> <!-- sql to call on an existing pooled connection when it is obtained from pool - MySQLValidConnectionChecker is preferred for newer drivers <check-valid-connection-sql>some arbitrary sql</check-valid-connection-sql> --> <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) --> <metadata> <type-mapping>mySQL</type-mapping> </metadata> </local-tx-datasource> </datasources> and this my web.xml entry <resource-ref> <description>DB Connection</description> <res-ref-name>jdbc/buinessCaliberDb</res-ref-name> <res-type>javax.sql.DataSource</res-type> <res-auth>Container</res-auth> </resource-ref> and this jboss-web.xml entry <jboss-web> <resource-ref> <description>DB Connection</description> <res-ref-name>jdbc/buinessCaliberDb</res-ref-name> <res-type>javax.sql.DataSource</res-type> <res-auth>Container</res-auth> </resource-ref> </jboss-web> Please help

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  • Broad Band LAN connection through existing 6 wire phone line ( no phone connected )

    - by Paul Taylor
    I have an (up to but never achieved ) 10 mb broadband signal coming into my house along the telephone line. The modem then connects the broadband signal via a LAN connection and Wi-Fi signal to my computers and iPad. My workshop desk is 54 yards (approx. 50m) downhill from the modem (part of a separate building) – too far to give a good direct signal. The inside corner of the workshop (by a window) receives a weak signal. I have a disconnected telephone cable consisting of 6 wires going from the house to the workshop. The telephone is no longer used in the workshop - we use our mobile number for business calls. A broad band signal using the cable would not have to share with a phone. What would be the most economic price/efficient way to get the broadband signal to the workshop? I am writing in hope that since the telephone didn't need the six wires, an Ethernet connection might be similar and not need all the eight wires for a LAN connection. In theory could use the telephone wire to pull an Ethernet cable trough the underground pipe but I doubt if the cable would survive the strain. The broad band connection in the workshop does not have to have network facility. My skill level is high enough to do house wiring, plumbing and gas fitting; so given any sound advice and a wiring diagram or instructions I can probably work out the rest myself.

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  • Wireless Internet Connection Sharing in Ubuntu

    - by klutch2
    As the title states, I need to share a wireless connection with a laptop running Ubuntu as the AP. The setup will be as follows: Corporate WiFi <<== Laptop <<== Other Devices i.e. (iPad, iPhone) I want to be able to connect the "Other Devices" via WiFi to the laptop. I have thought of setting up an ad-hoc network by connecting to the Corporate WiFi and then setting up a new network and hoping the connection to both would stay, but that doesn't seem to work. If I set up the ad-hoc network by itself, I can see it from my "Other Devices". The reason I need this is because for some reason, my iPad and my iPhone will not connect to my corporate WiFi and I need to use them so I want to use my laptop to share the connection and act as an AP for my "Other Devices". My laptop is a Chrome CR-48 running Ubuntu and as some of you might know, it does not have an ethernet port, so having a wired connecting and then setting up a network is out of question. I want to connect to the Corporate WiFi and share that connection by having the laptop act as an AP for other devices.

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  • Android Game Development problem with Speed = Distance / Time

    - by Charlton Santana
    I have been coding speed for an object. I have made it so the object will move from one end of the screen to another at a speed depending on the screen size, at the monemt I have made it so it will take one second to pass the screen. So i have worked out the speed in code but when I go to assign the speed it tells me to force close and i do not understand why. Here is the code: MainGame Code: @Override protected void onDraw(Canvas canvas) { setBlockSpeed(getWidth()); } private int blockSpeed; private void setBlockSpeed(int screenWidth){ Log.d(TAG, "screenWidth " + screenWidth); blockSpeed = screenWidth / 100; // 100 is the FPS.. i want it to take 1 second to pass the screen Math.round(blockSpeed); // to make it a whole number block.speed = blockSpeed; // this is line 318!! if i put eg block.speed = 8; it still tells me to force close } Block.java Code: public int speed; public void draw(Canvas canvas) { canvas.drawBitmap(bitmap, x - (bitmap.getWidth() / 2), y - (bitmap.getHeight() / 2), null); if(dontmove == 0){ this.x -= speed; // if it was eg this.x -= 18; it would not have an error } } The exception 06-08 13:22:34.315: E/AndroidRuntime(2801): FATAL EXCEPTION: Thread-11 06-08 13:22:34.315: E/AndroidRuntime(2801): java.lang.NullPointerException 06-08 13:22:34.315: E/AndroidRuntime(2801): at com.charltonsantana.game.MainGame.setBlockSpeed(MainGame.java:318) 06-08 13:22:34.315: E/AndroidRuntime(2801): at com.charltonsantana.game.MainGame.onDraw(MainGame.java:351) 06-08 13:22:34.315: E/AndroidRuntime(2801): at com.charltonsantana.game.MainThread.run(MainThread.java:64)

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  • jboss connection pooling

    - by Web
    I have a question related to Prepared Steatement pooling (across all connections). Here's the config file <datasources> <local-tx-datasource> <jndi-name>JNDI-NAME</jndi-name> <connection-url>jdbc:mysql://<server_name>/<database_name>?useServerPrepStmts=true</connection-url> <driver-class>com.mysql.jdbc.Driver</driver-class> <user-name>xxx</user-name> <password>xxxxx</password> <min-pool-size>10</min-pool-size> <max-pool-size>20</max-pool-size> <idle-timeout-minutes>20</idle-timeout-minutes> <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name> <valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLValidConnectionChecker</valid-connection-checker-class-name> <background-validation>true</background-validation> <background-validation-minutes>5</background-validation-minutes> <prepared-statement-cache-size>100</prepared-statement-cache-size> <share-prepared-statements>true</share-prepared-statements> <!-- sql to call when connection is created <new-connection-sql>some arbitrary sql</new-connection-sql> --> <!-- sql to call on an existing pooled connection when it is obtained from pool - MySQLValidConnectionChecker is preferred for newer drivers <check-valid-connection-sql>some arbitrary sql</check-valid-connection-sql> --> <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml --> <metadata> <type-mapping>mySQL</type-mapping> </metadata> </local-tx-datasource> </datasources> It seems that this line: <background-validation-minutes>5</background-validation-minutes> doesn't cause any problems with Prepared Statements, but: <idle-timeout-minutes>20</idle-timeout-minutes> causes that all connections are removed and re-created if there was no traffic for the last 20 minutes. Because of that existing Prepared Statements are removed from the pool of cached Prepared Statements. How to overcome this issue? I have to use idle-timeout-minutes because MySQL server closes the connection after 8h

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  • How to have internet connection over VPN while "Microsoft Firewall Client for ISA server" is running

    - by blocked
    I have the software mentioned in the title running on my machine. When I connect over VPN to my company's network, my internet connection gets borked, because somehow the ISA firewall blocks it. This is completely idiotic, because my work involves extensive use of the internet, so having to disconnect and reconnect continuously seriously cripples my productivity. (Meaning: I'm tearing my hair out here.) Can I have my VPN connection and somehow still have my internet connection too? I'm open to any solution.

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  • How to increase hard drive transfer speed

    - by atif089
    This is my motherboard GA-M61PME-S2 (SATA upto 3.0 Gbps) and This is my Hard Disk Samsung hd502hi Capacity 500 GB Cache 16MB Disks / Heads 1 / 2 Interface SATA 3Gb/s Spindle Speed 5400 RPM Sustained Data Rate OD 100 MB/s Average Seek 8.9 ms Average Latency 5.56 ms Data Transfer Rate 300 MB/sec Weight 470 grams Power: Idle / Seek / R-W / Spin-up 3.9W / 4.8W / 5.1W / ~24W Acoustics (sound power) 2.2 / 2.7 Bel (idle / quiet seek / performance seek) When I copy things from one partition to another they transfer at a maximum of 30 MBps. However the drive supports upto 300 MBps right ? How do I increase the transfer speeds? P.S - Using Windows XP, All partitions are NTFS.

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  • Turnkeylinux lampp guest doesn't have internet connection

    - by dave08
    I've set up a turnkeylinux lampp server in virtualbox with two network bridged connections, one for when I'm plugged in to my router, and one for when I'm using a wireless connection. This allowed me to pull up the turnkey control panel on the host machine's browser, but when I try going into the command prompt in the guest and run an apt-get update, it doesn't seem to have an internet connection, even though it seems to have a connection with the host. What could be wrong? Thank you very much in advance for any answers...!

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  • Sharing my broadband connection over a router

    - by user1004985
    I have a broadband connection which I can connect to my laptop's ethernet port. If I want to use the same connection on another machine I would have to do it via a router (I dont want to use ICS since it requires both machines to be ON). I have a router but its uplink is a 4p4c pin rather that an 8p8c(RJ45) so my broadband cable wont fit into it. The router I have is ZTE ZXDSL 531B. And the broadband connection I am talking about has an antenna on the rooftop from which an ethernet cable (CAT 5) runs to my PC's LAN port. Is there some way of utilising the LAN ports of the router to achieve what I mentioned above. Please Help

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  • Remote Desktop connection repeatedly aborting

    - by DerKlaus
    I connect to my workplace computer using Remote Desktop. After 1-2 minutes the application freezes to tell me after one more minute that the connection was aborted. It then reconnects. Everything works again for 1-2 minutes. Then the process repeats. Probably Forever. My coworkers do not experience such problems when connecting to the workplace. My workplace computer: Windows 7 32bit My home computer: Windows 7 64bit connected to the internet via WLAN-router with integrated ADSL modem (Linksys WAG200G) Things I already tried to fix the problem: disabled the Windows firewall disabled the other firewall reduced the MTU upgraded the firmware on the router configured port-forwarding to forward all packets to my home computer The problem remains unchanged. What could be the cause of the connection aborts? What else can I try to fix the connection? Thanks in advance.

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  • Secure Connection Failed using Firefox

    - by Saifallah
    I'm using Firefox 5 with some add-ons that require an external connection to a certain server (lastPass & Xmarks). I'm using the connection from my company, and every while & then I get a pop-up; Secure connection failed. This certificate in not trusted because the certificate issuer isn't trusted. (Error code: sec_error_untrusted_issuer) This also occurs using other versions of Firefox. Thanks in advance.

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  • Processor always at max speed

    - by Pratyush Nalam
    I am running Windows 8 Pro on an Apple MacBook Pro 9,1 Mid 2012 15 inch non retina. It has a Core i7-3720 QM CPU @ 2.6 GHz. For the past few days, I have noticed that it is constantly running at max speed which is 2.59 GHz. Before, it used to run at 1.5 - 1.8 GHz on normal usage. And, the weirder thing is that CPU usage is minimal. Screenshot: So, what is the reason for this? And is it harmful?

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  • Gather Outlook/Exchange connection Status responses from script

    - by mrTomahawk
    I'm trying to figure out a way in-which I can remotely gather Outlook = Exchange Connection stats from systems. I know I can have the users Right-click their Outlook icon in the system notification area, and then choose "Connection Status", but I'd really like to be able to poll this information without having to as the user to do anything. I saw this previous post, and I believe what he did is similar to what I'm trying to do we created a VB application that would pull user PTO information from a backend system and send out status emails to each of the users on a monthly basis but I'm trying to do it to gather the connection information from all my sites for certain parts of the day. Ideally I would like to do this via some sort of VBScript code since that is what I'm most familiar with, but I can work with Powershell too. My environment is all Exchange 2003 and Outlook 2003 clients.

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  • Connection Reset by Peer error with Apache and JBoss 7.1.1

    - by vikingz
    We are seeing errors on some of our QA testing scripts that intermittently throw Connection Reset By Peer errors. The Test scripts submit requests via F5 which forwards requests to Apache (2.2.21) with a mod_jk load_balancer with the following setting for each worker in the worker.property worker1 props worker.worker1.type=ajp13 worker.worker1.port=8109 worker.worker1.lbfactor=1 worker.worker1.host=skunkhost1.com worker.worker1.connection_pool_timeout=30 and here is what is in the JBoss domain.xml for the AJP port from JBoss 7.1.1 <unbounded-queue-thread-pool name="SKUNKY.APP.AJP"> <max-threads count="300"/> <keepalive-time time="3" unit="minutes"/> </unbounded-queue-thread-pool> Here is httpd.conf Timeout 300 KeepAlive On KeepAliveTimeout 15 MaxKeepAliveRequests 100 TraceEnable Off My question is that is it posisbe that apache times out and closes the connection while jboss is still ready and working on the request? What might be causing the Connection Reset By Peer error?what am i missing here? Any help is majorly appreciated!! Sincerely KK

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  • Which programs using my internet connection ? [closed]

    - by Eray Alakese
    Possible Duplicate: Monitor all and any internet traffic from my home PC - what should I use? My internet connection has 4GB quota. But my quota is run out very fast. I setup Net Limiter , for look which programs using my internet connection. But there isn't any weird program. There is only firefox.exe . So, how can i look all programs which using my connection and leech my bandwidth quota? For example, is there any CMD command ? like netstat

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