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• Making a Linux laptop flight-safe; disabling wireless/radio

  - by SpoonMeiser

  I'm going on a long flight tomorrow, and would like to be able to use my laptop during the journey. Wireless devices like WiFi and bluetooth interfere with airplanes instruments, and shouldn't be used on flights. If my laptop does not have a physical rf-kill switch, is it sufficient to just ensure that the relevant modules do not get loaded? If so, is that always safe, or does it vary between different hardware? My particular situation, is a Samsung NC10 netbook. Atheros 5k wireless hardware. Debian sid with kernel 2.6.30-1-686. However, I think it'd be interesting to know the answer to this question for the general case; not just my specific case.

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• how to disable to automatic wireless interface up in ubuntu? [closed]

  - by Surjya Narayana Padhi

  On my laptop I have a built in wireless card and I got one external connected via usb. By ifconfig command I saw both the cards connects to internet and gets IP. eth1 - the interface my laptop has in-built wlan1 - I have connected externally via usb. Now I applied "sudo ifconfig eth1 down" so that i can use only wlan1. But this eth1 goes down for sometime and then come up again automatically. So I am not able to test my externally usb connected wifi adapter. Can anyone suggest me way to disable eth1 interface?

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• how to design LAN connectivity between private and corporate ?

  - by maruti

  there is a bunch of servers connected to shared storage in a private LAN (10.x.x.x). this privateLAN is managed by a windows server (DHCP, DNS and directory services). how can these hosts be accessed from outside of this privateLAN? Eg. Remote desktop. can the NIC2 on each of the hosts be connected to the other public LAN (compromising speed or security? what are improtant considerations: additional hardware? like switches? routing&DNS software?

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• How to see if data is encrypted

  - by Brandi

  Is there an easy way to tell if I am successfully encrypting transfers between me and my database? Can I look at the network monitor or something that will tell me?

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

  - by DNS

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

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• How can I check how much data has been transfered in a particular remote computer in my LAN?

  - by oDx

  I am the system administrator. I am suspecting some unwanted data transfers in some of the computers under my lan. This also effects the overall performance of the network. Is there anyway by which i can check the transfered data over a particular interval. I am not supposed to install any applications on any other computers than mine. I have the router access. I can use tools like ettercap dsniff wireshark etc.

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• Apache not responding in amazon ec2

  - by Viren

  Well this might sound awkward but I facing terrible issue with my Amazon EC2 instance one of the finding I see is that apache is not responding on port 80 which is weird because I can't even find the incoming packet to port 80 in tcpdump output As per the security rules all security rules are in place correctly at least in amazon console I restarted the apache to listen to port 8080 and added port 8080 and add 8080 to security rule and everything work but I cant just able to understand as to why the port 80 not responding Needless to say since port 8080 is responding all my CNAME and A-record is working too UPDATE No firewall issue either I just cross check the iptables and list is empty Can some share a light on this

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• No network connection and error

  - by PS

  My PC keeps reporting the following error in the event viewer around every 10-15 minutes: Faulting application , version 0.0.0.0, faulting module unknown, version 0.0.0.0, fault address 0x00000000. Whenever it happens, the XP theme change to classic theme then change back to the normal theme. The network goes down and I must restart PC for the network to come back online. What could be causing this and how do i fix it?

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• Central Storage for windows user accounts homedirs .. hardware/software needed?

  - by mtkoan

  We have ~120+ users in our network, and are endeavoring to centralize logon authentication and home directory storage server-side. Most of the users are Windows 2000/XP machines, and a few running Mac OS X. Ideally the solution will be open-source-- can this all be managed from a Linux server running LDAP and Samba? Or would a hacked-NAS Box with a FreeNAS or similar suffice? Or is Micro$oft's Active Directory really the preference here. Is it viable to store PST files on this server for users to read from and write to? They are very large ~1.5gb. We have no mail server (or money) capable of Exchange or IMAP, only an old POP3. What kind of hardware horsepower and network architecture should we have for this kind of thing?

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• A really unique case of Load Balancing

  - by Shamshun

  I have an internet connection which has limited up/down bandwidth per IP address. What I want to do is to get multiple IP addresses on a "single" LAN interface, and use a load balancer to distribute traffic through them. I was successful at getting 100 ip addresses on a single interface. my problem is that Linux and Windows use the first ip address of an interface by default, so my bandwidth is not increased. I would appreciate if someone tells me what Load Balancing software has the ability to distribute load between multiple IPs on a single interface. I have tried to do so on both Win7 and Backtrack-LinuxR2

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• having public computers without joining the domain

  - by MCarter

  Good Morning, I would like to know what is the best arrangement for setting up 24 computers at a facility. We do not want these computers to join our domain because of security concerns. We plan on having these public computers connect to our wifi network. If anyone knows of the best way to approach this, that would be great! We also need to add printers to these public computers. We would also like to lock each computer down. Since we are not connecting by network, I assume we would have to configure each group policy.

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• Tool to automate basic connectivity testing

  - by feicipet

  After our vendors have setup a certain test environment, we need to go in to perform connectivity testing between PC to servers and also between servers. The problem is that we run a range of tests to telnet between 2 nodes on several ports and this is a manual and rather tedious process. Does anyone know of a small tool or script that I can take input on the range of ports to be test and will run an automated range of testing against those ports? All I need to do is to validate whether a TCP connection can be established from the source PC / server to the target server IP address / port. Thanks, Wong

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• MacMini transmit rate stuck at 11, every other device can connect at full 54Mbit/s?

  - by chum of chance

  I have a MacMini circa 2007 that's getting very low transmit rates via wifi, 8-11. I have other devices that are getting full 54, including a MacBook Air. With everything else off, the MacMini doesn't want to seem to go any faster. Since it has been previously connected to ethernet its entire life, I was wondering if there were some settings I can change to speed up the connection. Option-clicking the network icon gives this read out: PHY Mode: 802.11g Channel: 1 (2.4 Ghz) Security: WPA2 Personal RSSI: -73 Transmit Rate: 11 My new MacBook Air has the following readout: PHY Mode: 802.11n Channel: 1 (2.4 Ghz) Security: WPA2 Personal RSSI: -66 Transmit Rate: 79 Both have full bars and the wireless router is in the same room to eliminate any obstructions from the equation. Could the MacMini be connecting at an older protocol, like 802.11b and be reporting erroneously that it is connected at 802.11g? This would explain why I haven't seen a transmit rate above 11. Any further trouble shooting I can try before buying a new USB 802.11n device? The WiFi router is a DLink DIR-615. I can see other devices, and none, even the other g connected devices, are getting below 30-40 MBit/s. What's going on here?

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• Using a BTHomeHub as a wireless booster

  - by Ploo

  I currently have a BT HomeHub downstairs but the wireless signal isnt strong enough on the second floor. I have an old BT HomeHub from the previous contract that I wanted to set up upstairs. I currently have an ethernet cable leading up into the old router. I then took my laptop and plugged it into the old router in hopes of configuring it but when I cannot reach api.home which is the address of the router. I cannot connect to the router wirelessly either since the password was changed and I'd have to change it through config. At this point I am completely stumped, any ideas?

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• Best VPN Server

  - by eavar

  I don't like the standard vpn server on windows for some reason and I'm searching for the best client/server application in order to create a Virtual Private Network. I don't care if the application has it's own technology.

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• Hosting website when port 80 is taken?

  - by cinqoTimo

  A few months ago, we purchased an R-HUB unit to replace WebEx for remote support. The device operates through port 80, ehich doesn't appear to be configurable. I know in IIS, you can specify a port besides port 80, but the problem is in the port forwarding. On our router, we have to map an incoming port to the forward port which then directs traffic to the node (webserver). However, the incoming port for both the webserver and the R-HUB is 80 - and the server seems to be getting confused as I can only get to the R-HUB, not the website. How can I expose both devices? Host header headers? DNS config?

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• Verizon overbilling me ?

  - by bek

  I have verizon air card for my internet. Which is called vz manager. I have had it for about a year. Keeping within my usage allowance the whole time until 3 months ago, when my bill came in my 5,000 g allowance was ran to 18,000. It has continued to do so through the last 3 months. My usage reset itself yesterday for the new month. I got on google for about 5 minutes and chatted for about an hour yesterday online. Mind you that I have never done anything any different then i do everyday. I do not download music or watch videos on my computer, nothing like that. Well since last night a 8 pm my usage sayd 1109.525 gb. ALREADY! For being on the internet for an hour with no downloads. What could be causing this, please thrown me some ideas. Verizon is checking on the problem, but that usually doesnt get me the answer i want. Can someone be hacking my card and using internet through it, has told me that that is not possible, however I think with the internet anytihng is possible.

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• Visual indication of network activity

  - by at.

  is there a simple application which can sit on top of a fullscreen game to give me an indicator of when there is a lot of network activity? I can only seem to find system tray apps or programs which work outside of fullscreen games. Preferably something transparent so i can see through it. A little background info: I used to have my PC sitting sideways on my desk so I can see lights from the network card. The lights stopped working a while ago and all I need is a little blinking application to tell me when there is activity. I do not need a detailed graph or bandwidth usage, just activity notification. I've looked everywhere for something, maybe you guys are better at searching than me.

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• How do I fix a permissions problem with MS Distributed File System?

  - by charlesrandall

  I have a computer that is new, Windows 7, that is supposed to have access to particular network resources on a Distributed File System. However, despite all permissions being set correctly, I have consistent trouble accessing them. For instance, I'm supposed to be able to reach \company.org\main\subdir. All the permissions have been granted, only when I try to access it by name, it tells me I don't have permission to access \main. This is where the fun starts. If I ping company.org, get the IP, replace company.org by the IP, I can then access \IP\main\subdir without any problems at all. However we have a ton of scripts and build tools that access the network resource by name. My sysadmin has found that using MS's dfsutil.exe, we can fix it temporary using this sequence of commands: C:\dfsutil.exe /pktinfo C:\dfsutil.exe /PktFlush C:\dfsutil.exe /SpcFlush C:\dfsutil.exe /PurgeMupCache C:\dfsutil.exe /pktinfo After that, everything is great... until I reboot, or until some unspecified time later where suddenly I don't have access to \main\ anymore. Hoping to find a more permanent solution than waiting for it to break and running a batch file.

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• My raspberry pi server hostname doesn't work?

  - by xSpartanCx

  The people over on the rPi forums don't have any answers for me... I've got a raspberry pi running raspbian server edition. My problem is that the only way I can ssh into it with putty is through the static ip. My router doesn't recognize the hostname; it shows the mac address as the name. This causes the pi not to show my apache2 website online (I think). The only way I've gotten it to work is using my other linux server to forward using virtual hosts, and that has to use the ip address, too. However, now that I have my other server off, the website doesn't work.

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• Connect a linux server to network and access it from another computer browser

  - by user1732451

  I had a server in a hosting company and I took it home. I need to connect him to a local network (not wifi) and access to the server from another computer in the network via browser, like I did it when it was in the hosting company. I don't have any knowledge in linux, I just know how to type in the command line :) I thinks all the IP configuration of the server is one big mess, because it passed from more then one hosting company to another... I tried a lot of tutorials that I found in the web, but nothing works - mainly because I don't know how to check if I did something wrong. I just need to know how to connect to local network ( D-Link router) and then access the server from another computer browser. thanks update: the server os is: CentOS release 4.8 (Final)

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• Can't ping my computer - "Transmit failed. General failure."

  - by Vaccano

  I am having an issue with my computer. My IIS services are not working. I have narrowed it down to the fact that my computer cannot find itself via its name. I try pinging my computer by its name and I get this: C:\Users\18773ping MyComputerNameHere Pinging MyComputerNameHere [::1] with 32 bytes of data: PING: transmit failed. General failure. PING: transmit failed. General failure. PING: transmit failed. General failure. PING: transmit failed. General failure. Ping statistics for ::1: Packets: Sent = 4, Received = 0, Lost = 4 (100% loss), I tried having someone else ping my machine and it works fine for them. Any ideas?

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• Can't connect to web-server on local host behind NAT

  - by eyeinthebrick

  I got Ubuntu as host. I'm running a web-server on http://192.168.199.8:80. It is accessible from the local network, but when I'm trying to reach it by external IP, I go to my router's web-page. I arranged port forwarding on router for port 80 to my local IP 192.168.199.8. Unfortunately web-server is still unavailable via external IP. I checked whether the port is open via http://www.canyouseeme.org/. As it showed that the port is unavailable, I changed port used to 3659 (not forget to rearrange port forwarding rule). Although http://www.canyouseeme.org/ shows that port 3659 is open, I still can't reach my web-server. Where can the problem be?

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• Where Can I get good certification as server admin?

  - by meyosef

  Hi, I programmer without job. Where Can I get good security network certification (online ) as server admin, that will help me to get better Job? Thanks

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• How to connect to sql server trough a pc(firewall)

  - by umetzu

  i have two pc's on my lan (one with "iis and a public ip) and another with(sql server and lan ip). How i can access to the sql server pc trough iis pc From a pc on the internet?

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