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• Prevent Network Printers Automatically being added to 'Devices and Printers' in Windows 7

  - by Ben

  I think my question is a duplicate of this one, but the original question was never properly answered (the steps described are for Windows XP). I am aware of the option to "Turn off Network Discovery" (under Control Panel All Control Panel Items Network and Sharing Center Advanced sharing settings); I set this option (for both Home/Work and Private) but it doesn't seem to stop the printers getting added, and has the side effect of preventing me from browsing the list of machines on the network (which I need). I've tried the Windows XP registry option - but it doesn't seem to make any difference: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\NoNetCrawling I find it annoying having the printer list cluttered with printers from all over the office which I am never going to use (especially since lots of them no longer physically exist, users just haven't deleted them from their machines). This must be a real problem for people in massive offices with large numbers of printers - but I can't seem to find a lot of people complaining about it - which makes me think I'm missing something obvious. I don't really want to hack the firewall or turn off sharing completely, I still want to select and use network printers and file shares. Any ideas?

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• Vista machine hardwired cannot see xp laptop on wireless

  - by Kahega

  I have a laptop with windows xp, connected to my wireless router. I am trying to view the shared files on the laptop with my vista desktop computer. The desktop computer is hardwired to the same router. I can see the desktop pc fine on the xp laptop, and view the shared folders. I cannot see the xp laptop when on the desktop pc. I have tried installing the link update for xp, that is not the issue. I have also tried turning off firewalls, no dice. I have scoured google for this issue, and do not see any resolutions. Any suggestions would be appreciated.

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• All traffic is passed through OpenVPN although not requested

  - by BFH

  I have a bash script on a Ubuntu box which searches for the fastest openvpn server, connects, and binds one program to the tun0 interface. Unfortunately, all traffic is being passed through the VPN. Does anybody know what's going on? The relevant line follows: openvpn --daemon --config $cfile --auth-user-pass ipvanish.pass --status openvpn-status.log There don't seem to be any entries in iptables when I enter sudo iptables --list. The config files look like this: client dev tun proto tcp remote nyc-a04.ipvanish.com 443 resolv-retry infinite nobind persist-key persist-tun persist-remote-ip ca ca.ipvanish.com.crt tls-remote nyc-a04.ipvanish.com auth-user-pass comp-lzo verb 3 auth SHA256 cipher AES-256-CBC keysize 256 tls-cipher DHE-RSA-AES256-SHA:DHE-DSS-AES256-SHA:AES256-SHA There is nothing in there that would direct everything through tun0, so maybe it's a new vagary of Ubuntu? I don't remember this happening in the past.

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• Snap Server 18000 connection help!

  - by sicko666

  I wonder if anyone here can help me. I have a home server setup made up of old secondhand computers, 2 servers running Windows Server 2003, 1 workstation running Windows 7, a 16 port switch & an adsl ethernet modem. All these connect and talk to each other fine but then I got a "Snap Server 18000" and a "Snap disk 30sa" sata array. When I turn the Snap on, it boots past the BIOS, runs a kernel, then displays: This device cannot be managed via the video/kbd/mouse interface. The video is now disabled. You may access the management functions from your web browser. Only, none of the other PCs detect it, so no browser can find it! I have checked all cables, and all LEDs indicate there's a connection. I have installed the windows "iscsi" and the adaptec "Snap Server Manager" on all PCs but still it's not detected. I don't know what else to do, please advise!

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• Proxification rulte for System process

  - by kseen

  I'm trying to configure Microsoft Visual Studio 2010 remote debugging and ran into issue: while connecting to remote computer running MSVSMON, client computer sends SYN request for connection. It makes it under the System process (as I see it in TCPView). As every network apps should be configured to use proxy in our network, I'm trying to add devenv.exe to proxification rules to make its traffic goes thru LAN's proxy server. It doesn't help. So my question is how can I make that low-level-system traffic will go through local area network proxy server?

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• http, https and ftp is not working but smtp and imap is working

  - by Unicron

  hi all, yesterday on a computer of a friend a strange thing happened. after booting the ports fo http, https and ftp are closed but e-mail is still working. in the control panel the windows firewall seems active even if he tries to deactivate it. i have a suspision that it is the faul of norton internet security 2010, we have tried to uninstall it, but the uninstallation did not work. when using the removal tool from symantec it just goes to 23% and then it crashes. the process ccSvcHst.exe is still running. how can i safeley remove the rest of norton internet security? thanks in advance [edit] norton internet security 2010 is sucesfully removed, but still no connectivity

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• Remote connection IP to use

  - by petwho

  I have two laptops that both run on ubuntu and installed ssh server and ssh client on them. One is usually on my desk at home and one I usually bring to my company. When I'm at home I can easily ssh to one from the other by typing this command (to login to the other laptop whose IP address is: 192.168.0.105) : ssh -p 22 [email protected] However, When I'm at my company, I try to type the same command and ofcourse it doesn't work. I understand that when at home I'm on LAN network, that my laptops actually using my ISP's address which differ from 192.168.0.107 asummed 203.113.131.1. So could you tell me what IP that ssh shoud use for my laptop (at work) to connet to my computer at home? Thank you.

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• How can I use two Internet connections in Ubuntu?

  - by Martin

  My goal is to be able to do something like this: curl google.com --interface ppp0 curl google.com --interface p2p2 ppp0 is a DSL connection, and p2p2 is a separate direct Internet connection. Currently I can only get one of these to work at a time. When I enable one, the other one stops working. /etc/network/interfaces: # The loopback network interface auto lo iface lo inet loopback # DSL auto p2p1 iface p2p1 inet manual auto dsl-provider iface dsl-provider inet ppp pre-up /sbin/ifconfig p2p1 up # line maintained by pppoeconf provider dsl-provider # DIRECT auto p2p2 iface p2p2 inet dhcp ifconfig: lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 p2p1 Link encap:Ethernet inet6 addr: fe80::20a:ebff:fe21:99c6/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 p2p2 Link encap:Ethernet inet addr:192.168.1.101 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::20a:ebff:fe17:1249/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 ppp0 Link encap:Point-to-Point Protocol inet addr:53.193.231.167 P-t-P:53.193.224.1 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1 route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 ppp0 10.0.10.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2 53.193.224.1 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 p2p2 By default, only ppp0 works. If I run "route add default gw 192.168.1.1 p2p2" then I can use p2p2 but ppp0 stops working. If I then run "route add default gw 53.193.224.1 ppp0" then I can use ppp0 again but p2p2 stops working. What can I do to be able to use both interfaces selectively?

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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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• Connect a PC to Mac OS X Server

  - by Paul Sheldrake

  I'm trying to connect to a server at work which is run on a Mac but I have a PC (windows 7) at home. I have path to connect in the format of afp://server.com/files. Is there a client that I need to install on my PC that I can use to login? Thanks, Paul

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• Top ten security tips for non-technical users

  - by Justin

  I'm giving a presentation later this week to the staff at the company where I work. The goal of the presentation is to serve as a refresher/remidner of good practices that can help keep our network secure. The audience is made up of both programmers and non-technical staff, so the presentation is geared for non-technical users. I want part of this presentation to be a top list of "tips". The list needs to be short (to encourage memory) and be specific and relevant to the user. I have the following five items so far: Never open an attachment you didn't expect Only download software from a trusted source, like download.com Do not distribute passwords when requested via phone or email Be wary of social engineering Do not store sensitive data on an FTP server Some clarifications: This is for our work network These need to be "best practices" tips for the end-user, not IT policy We have backups, OS patches, firewall, AV, etc, all centrally managed This is for a small business (less than 25 people) I have two questions: Do you suggest any additional items? Do you suggest any changes to existing items?

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• Windows 7 Forbid connecting to a specific wireless network

  - by Elliot

  Does anyone know how to tell windows 7 to bar a wireless network? It keeps logging into a random open one with no bandwidth my neighbors have instead of the good one we have here. I keep unchecking "automatically log in if available" and it keeps re-checking itself. I want it to NEVER log into this network no matter what without manual intervention. I do not want to disable auto connecting, just tell it "do not ever connect to this one without my express permission".

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• Mysterious login attempts to windows server

  - by Jim Balo

  I have a Windows 2008R2 server that is reporting failed login attempts from a number of workstations on our network. Some event log details: Event ID 4625, Status: 0xc000006d, Sub Status: 0xc0000064 Security ID: NULL SID, Account Name: joedoe, Account Domain: Acme Workstation Name: WINXP1, Source Network Address: 192.168.1.23, Source Port: 1904 Logon Process: NtLmSsp, Authentication Package: NTLM, Logon Type: 3 (network) I believe this is coming from some netbios service or similar (maybe the file explorer), keeping an inventory of its network neighborhood and also trying to authenticate. Is there a way to turn this off without having to turn off file sharing all together? In other words, clients authenticating against file servers that they use is of course no problem, but I want to eliminate clients trying to authenticate to servers that they are not using and have no business with. The above example is only one of thousands of log alerts for similar failed network authentications. What can I do to clean this up / handle this? Thanks.

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• Multiple VLAN on one switch port

  - by Macropus

  I have a HP ProCurve 1810G-8 which I currently use as a normal switch between 3 servers and a firewall. 2 of the servers are ESXi hosts, and one is a Nexentastor box with 2 iSCSI target LUNs. As the iSCSI traffic is on the same LAN as all other traffic, I would like to switch this to use a SAN for iSCSI traffic and the LAN for all other traffic. The Nexentastor box only has 2 NICs, and as such, with a physical arrangement, I presume that one must be plugged into the SAN VLAN and one on the LAN VLAN ports of the switch. Is there a way to have multiple VLANs over the same port? e.g. the Nexentsator box has 2 NICs, both plugged into the switch, both ports with access to both of the VLANs?

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• Should I enabled 802.3x hardware flow control?

  - by Stu Thompson

  What is the conventional wisdom regarding 802.3x flow control? I'm setting up a network at a new colo and am wondering if I should be enabling it or not. My oh-cool-a-bright-and-shiny-new-toy self wants to enable it, but this seems like one of those decisions that could blow up in my face later on. My network: An HP ProCurve 2510G-24 switch A pair of Debian 5 HP DL380 G5's with built-in NC373i 2-port NIC LACP'd as one link. 9000 jumbo frames enabled. (Application) A pair of hand-built Ubuntu server with 4-port Intel Pro/1000 LACP'd as one link. 9000 jumbo frames enabled. (NAS) A few other servers with with single 1Gbps ports, but one with 100Mbps. Most of this kit is 802.3x. I've been enabling it as I go along, and am about to test the network. But as my 'go live' day nears, I am worried about the 802.3x decision as I've never explicitly used it before. Also, I've read some 10-year old articles out there on the Intertubes that warn against using flow control. Should I be enabling 802.3x hardware flow control?

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• MikroTik ipv6 Tunnel

  - by MikeSmitty

  I've got a MikroTik router set up with the latest stable OS on it, and I just set up an ipv6 tunnel with Hurricane Electric, but I'm having an odd issue with it. I can't ping anything until I first ping the tunnel endpoint on HE's side. After that I can ping any ipv6 address fine, but give it a little time (say, maybe 30 sec) and I can't ping any ipv6 addresses again. Whenever it stops allowing ping to go through I notice the counter on my firewall rule that drops invalid connections goes up. this is my ipv6 firewall config: add action=accept chain=input comment="" connection-state=established \ disabled=no in-interface=sit1 add action=accept chain=input comment="" connection-state=related disabled=no \ in-interface=sit1 add action=accept chain=input comment="" disabled=no in-interface=bridge \ src-address=ipv6_address_here/64 add action=drop chain=input comment="" connection-state=invalid disabled=no \ in-interface=sit1 add action=drop chain=input comment="" disabled=no in-interface=sit1 Any ideas on what it could be?

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• NATing IPv4 while routing IPv6

  - by Hugo

  I've the following setup: client(s) <---> (eth0) router (eth1) <---> wan I have a static IPv4 address and a /48 IPv6 address block. I need to connect all the clients to (wan). Each client will have it's own public IPv6. Meanwhile, I need to NAT those same clients over to (wan). Everything IPv4-related and the NAT are working fine. The IPv6 communication to/from (eth0)<-(clients) works fine, as does the IPv6 communication from (eth1)<-(wan) works fine. To provide IPv6 to all my clients, I've thought of too choices: Having the router as a gateway, which different IP on each interface. This sounds like I need to tell my ISP to route the entire block through that single IP, so it's not really an option. Transparently pass IPv6 packets to/from eth0<-eth1, so all clients can communicate with the upstream gateway (I would actually have a switch here if it weren't for the need to remain IPv4 compatible). So, since I've opted for the second choice, I'm in doubt: How can I pass all IPv6 traffic from eth0 to eth1 transparently? What I need is a level 3 bridge, but linux's bridgeutils create a level 2 bridge (which would bridge ipv4 as well, and I can't have that). This is a DD-WRT device, but it's pretty much an embeded linux, so most suggestions that would work on linux are welcome. Thanks.

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• Bandwidth Control on our Internet Connection

  - by AlamedaDad

  Hi all, I have Covad dual/bonded T1 service in our office coming through a Cisco 1841 and then through a Sonicwall 3060Pro/Enhanced SW firewall. The problem I'm looking for some input on is how to limit the amount of bandwidth any single user/PC can user for downloading a file from the Internet. It's become an issue that when one person happens to download let's say an ~300MB file, normal internet access for the other employees slows to a crawl. I've seen through MRTG that in fact usage of the circuit jumps to the full 3mb for the duration of the download and then drops. Is it possible to control this? I'm not familiar with QOS or the like so I'm not sure. Any help on this would be appreciated. Thanks...Michael

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• Windows 7 can't connect to via ethernet to Airpot Extreme

  - by Mr AJL

  I have an Airport Extreme, and everything works beautifully on the Mac, but my Windows 7 computer, which is connected via a regular ethernet cable, can't see any network. The Windows computer says there's no cable connected. Any ideas? Is there some kind of setting you have to enable with the Airport utility? I looked everywhere but can't find anything. Or do I need to install that Airport utility something on the PC just to connect to the router? (Haven't tried because the PC has no CD drive)

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• Looking for software to create a personal hotspot on Mac OS X (not using the built-in ability)

  - by Fred

  I got my nifty little MacBook Air today. Since I will be going on travel I was hoping to use my iPad 3G as screen extension with Air Display. It works being in a shared WiFi network. Sadly Apple is a bit restrictive on the tethering with their mobile devices such as the iPad. Now I read iOS 4.3 will enable the iPad to use tethered networks. But the feature will not be working for iPad 3G. I assume their big partner telecom companies fear everyone will quit their internet contract with them. So I want to create a personal hotspot on my MacBook and use it on my iPad. But the iPad is not able to use this network. The network is visible but not usable. On Windows there is this connectify program which lets the PC act as wireless router. Does anybody know a similar program for Mac which would turn it into a wireless router? Or is there something I don't see with Mac OS X's builtin features?

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• Domain connection shows as "unauthenticated"

  - by gareth89

  I have seen various different questions for this problem floating around but either the circumstances arent the same or the solution doesnt work so thought i would post it to see if anybody has any suggestions. Various domain PCs and laptops appear to randomly give the connection name of "lewis.local 2(Unauthenticated)" - lewis.local being our domain - and provides an exclamation mark where the network type logo is normally shown. This also appears to happen every time connecting via vpn. Our setup is: 2 servers both running windows server 2003 R2 (x32) main server has AD, DNS and DHCP installed IPv4 on approx 30 client machines (some wired, some wireless) If anybody has any thoughts on solutions i would appreciate it. I have tried removing all but AD server roles, resetting all of the systems and nothing. It doesnt prevent anything from working just like a domain connection most of the time however it is getting fustrating! Also dont know if it could have anything to do with it but the DHCP server seems to have quite a long lead time on issuing the IP address to the client.

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• Two identical fiber optic broadband lines working as one

  - by Katafalkas

  I have been trying to find an answer to this, but all I can find is hobbyists trying to connect their Linksys devices to get some magic out of them. I am looking for a way I could combine two 100Mbit fiber optic lines into a single connection for our office. I assume it involves some Cisco learning or something similar. Do I need to configure some big router to load-balance the NATing in some way? I assume that many of you have done something similar and hope someone could share their knowledge or at least provide me some tips on how to do this.

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• Network transfer from host to VM very slow - VMWare Server & Windows 2003 Server

  - by barfoon

  Hey everyone, Im trying to transfer a file from a Windows 7 host running VMWare Server to a Windows 2003 server VM, and it's painfully slow. I've tried adding/adjusting registry keys and settings found on KB articles, and still nothing. Ive tried this: http://support.microsoft.com/kb/898468 http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1619 Vmware tools are installed. Any ideas? Thanks,

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• Why the server is not responding?

  - by par

  Hello! Our server occasionally refuses to serve a simple HTML page. This is happening during a relatively high number of requests. However, the processor is not heavy loaded and there are a lot of free memory. The error seems to occure 1 out of 50 requests in average, depending on the server load. I need to find the source of the problem and take the appropriate actions to eliminate it. I have a suspicion that the problem source is a huge number of incoming network packets. There are 5000 packets per second on average. Traffic - 2 MBits/sec Can this be the cause of the error? There is an interesting thing, in case the server fails to respond, the request string is not logged to access.log by Apache. The error is repeatable from several client computers. DNS is not involved, since I have accessed the server by the IP. I have profiled the problem case with tcpdump utility. These are the good and bad sessions traced by tcpdump. The request is the same in both experiments. Good - server returns response. Bad - no response, time-out error. ---- Bad ---- 12:23:36.366292 IP 123.45.67.890.61749 > myserver.superbservers.com.www: S 2125316338:2125316338(0) win 8192 <mss 1460,nop,wscale 2,nop,nop,sackOK> 12:23:39.362394 IP 123.45.67.890.61749 > myserver.superbservers.com.www: S 2125316338:2125316338(0) win 8192 <mss 1460,nop,wscale 2,nop,nop,sackOK> 12:23:45.365567 IP 123.45.67.890.61749 > myserver.superbservers.com.www: S 2125316338:2125316338(0) win 8192 <mss 1460,nop,nop,sackOK> -------- ---- Good ---- 12:27:07.632229 IP 123.45.67.890.63914 > myserver.superbservers.com.www: S 3581365570:3581365570(0) win 8192 <mss 1460,nop,wscale 2,nop,nop,sackOK> 12:27:10.620946 IP 123.45.67.890.63914 > myserver.superbservers.com.www: S 3581365570:3581365570(0) win 8192 <mss 1460,nop,wscale 2,nop,nop,sackOK> 12:27:10.620969 IP myserver.superbservers.com.www > 123.45.67.890.63914: S 2654770980:2654770980(0) ack 3581365571 win 5840 <mss 1460,nop,nop,sackOK,nop,wscale 6> 12:27:10.838747 IP 123.45.67.890.63914 > myserver.superbservers.com.www: . ack 1 win 4380 12:27:10.957143 IP 123.45.67.890.63914 > myserver.superbservers.com.www: P 1:213(212) ack 1 win 4380 12:27:10.957152 IP myserver.superbservers.com.www > 123.45.67.890.63914: . ack 213 win 108 12:27:10.965543 IP myserver.superbservers.com.www > 123.45.67.890.63914: P 1:630(629) ack 213 win 108 12:27:10.965621 IP myserver.superbservers.com.www > 123.45.67.890.63914: F 630:630(0) ack 213 win 108 12:27:11.183540 IP 123.45.67.890.63914 > myserver.superbservers.com.www: . ack 631 win 4222 12:27:11.185657 IP 123.45.67.890.63914 > myserver.superbservers.com.www: F 213:213(0) ack 631 win 4222 12:27:11.185663 IP myserver.superbservers.com.www > 123.45.67.890.63914: . ack 214 win 108 -------- Hoster: SuperbHosting OS: Ubuntu Server parameters: E6300 CONROE 1.86GHZ 2 X 1MB CACHE 1066 1GB DDR2 667MHZ This is a link to apache configuration file we use http://repkin5.snow.prohosting.com/apache.txt This is server-status report taken right after time-out error. http://repkin5.snow.prohosting.com/server-status.htm There are only 10 Child Servers running out of 120, so enough space for new requests. VMSTAT procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 8900 725900 8468 65684 0 0 5 18 11 33 4 3 92 1

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• Extend my LAN network

  - by user268291

  i have a patch panel and hardwiring already setup in my office. The patch panel is 24-port and all the ports are engaged. All my switch ports are engaged. Now, I have a printer connected to a wall point (RJ45) which I want to shift to a new room where there is no LAN setup. I want to have two RJ45 wall plugs in the new room so that I can connect one RJ45 port to have my LAN in the new room and the other RJ45 wall port I want to use for my printer. There is no option other than LAN (no wireless). Please help me and tell me how do I get the two RJ45 wall plate plugs in the new room up and keep my LAN running. It is a little urgent for me. Please help.

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