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  • Server seems up, but accepts no connections whatsoever

    - by Rnatau
    Hi, I have a problem with a Debian based Server, unfortunately housed in a remote location. Two days ago, it was suddenly down and completely unreachable. After having someone reboot it, it worked for about a day, then seemed to be down again. This time, however, it was different: -The server reacts to pings -It is scannable, and all the relevant ports are open But: -Open shells were immediately blocked, and no warning had been shown -It's not possible to open any connection - the TCP/IP handshake seems to have some problems: SSH handshake As this is a private server of a small community, we don't have the resources to pay a technician to fix the problem for us, so any hints how to fix the problem after the next reboot would be highly appreciated... Thanks a lot!

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  • Is a VPN a good method for protecting data in an untrusted network? [closed]

    - by john
    I will be connecting my laptop in an untrusted network. If I setup OpenVpn on a server and use a vpn client on the laptop to connect through it, is it enough? Can someone perform a MITM attack or otherwise eavesdrop on my traffic? If someone on the local network port-scans my laptop, will the open ports be accessible to him while I use the VPN tunnel? Is there anything else I should keep in mind?

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  • NET USE LPT2: printer_port

    - by tpierzina
    This I understand: net use P: \\SOME_COMPUTER\SOME_SHARE net use P: \\1.2.3.4\SOME_SHARE (the second argument is a logical share on the given computer) This, I do NOT understand: net use LPT2: IP_1.2.3.4 (where IP_1.2.3.4 is the name of a "port" assigned to a printer; the IP is a valid and responding device, but the full string "IP_1.2.3.4" is not) Can anyone tell me, is there ever a syntax of NET USE that could operate on a printer port like that? I can't get it to work, can't find anything via Google, and am practically in tears. [Sorry if this is cheating, this is basically a re-post of http://stackoverflow.com/questions/1884235/old-school-windows-2000-printing-or-when-is-a-port-name-a-computer but with the scope narrowed just to the main issue at hand.

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  • Are there any open-source simple network monitoring applications? [duplicate]

    - by scottm
    This question already has an answer here: What tool do you use to monitor your servers? 73 answers I am debugging a problem with one of our systems. Every Sunday, it stops communicating with another server. If we reboot both servers, communication works again. I was wondering if there are any small footprint apps that monitor TCP port availability and network connectivity, possibly logging any downtime. I'd also like it to be open source if possible, but if there is another solution that is proprietary, I'd like to hear about it also.

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  • What exactly is a Mobile mouse? + Mouse Recommendation

    - by chobo2
    I am really disappointed with Logitech. My first cordless wireless mouse was from them and it lasted like 5 years. So I decided to get another one from them http://www.futureshop.ca/catalog/proddetail.asp?logon=&langid=EN&sku_id=0665000FS10099373&catid= And this mouse sucks bad. After 6 months it broke. I returned it under warranty and got a new one now 4-6 month later it is on the verge of breaking again.... You pay like $50 for this mouse and it lasts like 6 months that sad. I just lost faith in Logitech mice as I remember my bro also had a logitech mouse too and it broke after like 6 months. He then bought another logitech mouse(different model) that has been working for maybe 2 years(and no signs of breaking) but I am not crazy about the mouse(I don't like the 2 buttons by the wheel) and I not sure if they even sell it(maybe they got rid of it because it lasts too long). http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=1578495&CatId=1285 So I am looking at a Microsoft mouse. http://www.futureshop.ca/catalog/proddetail.asp?logon=&langid=EN&sku_id=0665000FS10125565&catid= I am looking at this one but I am not sure what they mean by mobile mouse. I think that is what MS calls notebook mice. So I am not sure if this would be a good mouse to get for a desktop. I see it uses like a micro usb receiver but I am not sure if it is smaller then a standard mouse. But almost all the mice I looked at at futureshop.ca or staples are labeled notebook mice or mobile mice. So not sure what mice would be right for me. I don't want a corded one though. I really liked the LX6 design alot but it can't last more than 6 months. Thanks

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  • HP Officejet 4500 G510n-z Not Showing up in Remote Desktop (Terminal Services)

    - by Greg_the_Ant
    I installed this printer on a windows XP machine. First using the wireless option, and later using USB. In both cases when I connect to my other computer (also Windows XP) via terminal services and check printers in the local resources tab it does not show up on the remote session. I used to have a Samsung connected to my local computer over USB and and that worked fine over terminal services. Things I tried so far: I did read this page and installed the software fix on both computers: (Printers that use ports that do not begin with...) I installed the minimum HP software install on the remote computer and that didn't help either. I also tried running the add new printer wizard on the remote computer: I selected "local printer attached to this computer" and did not check the "automatically.." option. On the next page of the wizard I can select an option for "use the following port". I see options for TS001 through TS009 there. I'm assuming those are coming from the local machine. I tried clicking each one and then checking "have disk" and pointing it to C:\3be8dc611b11322e8ddf8a67\i386\msxpsdrv.inf 1 but for every single TS00.. port it says "The specified location does not contain information about your hardware." Any help would be greatly appreciated. I'm pretty stuck at this point. 1 C:\3be8dc611b11322e8ddf8a67 is the folder I extracted the HP driver software to after I downloaded it.

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  • Linksys router cannot change default password

    - by Jessica M.
    My wireless internet suddenly stopped working today. I have Windows 7 and Lindsys WRT54G router. I tried to log into the Linksys setup router page by typing in www.192.168.1.1 into firefox and it prompted me for a username and password as usual. The problem is when i tried to enter my regular username and password it did not work. I finally solved my problem when I came across this post here and the very last post solved my problem. It suggested I try username: root / password: admin. For some reason the username and password has been changed. When i tried username: root / password: admin , it worked and allowed me to get into the Linksys setup page. The problem is I can't change the username or password anymore. Every time I want to log into my Linksys setup page I have to enter username: root / password: admin. I can't change the "WPA shared key" (password). For the security settings I selected WPA2Personal + AES. Also the post said "If the firmware was upgraded to non-linksys firmware - the default will be different" . The problem is I didn't update anything and I'm worried that someone installed a virus or something or somehow changed the firmware on my router. How did I get non-Linksys firmware on my router? EDIT: I figured out how to change the password when I log into the Lynksys setup page. Administration -- Management -- password. I still don't understand if my router firmware was changed or who changed it or if it happened by mistake.

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  • Wiring my internet

    - by u8sand
    I have Verizon internet service and am currently using wifi. My router is in the basement and my desktop computer is 2 floors and on the other side of the house above it... Worst possible positioning but that's just how things worked out. My wireless currently is extremely unstable so I've decide to correct the problem by wiring my computer directly. The problem lies here: when redoing the room next to it (when the wall was open) we went ahead and wired some coaxial cable from our attic to our basement (with plenty of slack on both ends, don't ask me why we didn't go ahead and wire a CAT6 cable). The question is: Can I use the coaxial cable to bring me internet connection? Naturally the router (which needs to stay where it is) takes a coaxial cable input and has Ethernet outputs. So maybe I would have to take a ethernet cable, convert to coaxial-coaxial to my computer, convert back to ethernet. Is this even possible to convert from coaxial to ethernet? Or do I have to attempt to go ahead and fish a cat6 cable through my house. I cannot just split the signal because that would require two routers and two networks (which I don't believe would work with one cable-one ISP correct me if I'm wrong). Thanks

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  • How is it possible that I can do a host lookup but not a curl?

    - by Daniel Quinn
    Has anyone ever seen this before? Note that this happens not only with google.com, but with every domain I try. It's a wireless connection (WEP), but I'm not sure how that would be relevant: $ curl -v google.com # This takes about 60s to return * getaddrinfo(3) failed for google.com:80 * Couldn't resolve host 'google.com' * Closing connection #0 curl: (6) Couldn't resolve host 'google.com' $ host google.com google.com has address 209.85.148.106 google.com has address 209.85.148.147 google.com has address 209.85.148.99 google.com has address 209.85.148.103 google.com has address 209.85.148.104 google.com has address 209.85.148.105 google.com mail is handled by 30 alt2.aspmx.l.google.com. google.com mail is handled by 40 alt3.aspmx.l.google.com. google.com mail is handled by 50 alt4.aspmx.l.google.com. google.com mail is handled by 10 aspmx.l.google.com. google.com mail is handled by 20 alt1.aspmx.l.google.com. $ cat /etc/resolv.conf # Generated by NetworkManager nameserver 192.168.1.201 $ cat /etc/hosts 127.0.0.1 localhost ::1 localhost $ netstat -rn Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 0.0.0.0 192.168.1.254 0.0.0.0 UG 0 0 0 wlan0 127.0.0.0 127.0.0.1 255.0.0.0 UG 0 0 0 lo 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 wlan0

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  • PEAP validating a secondary domain suffix

    - by sam
    Probably the title is a little bit confusing, let me explain the situation. Our company wants to implement a corporate wireless lan with PEAP authentication. unfortunately someone made a big mistake in our AD design 10 years ago. The domain name we are using "company.ch" is not owned by company but by someone else. so it is not possible to issue a public SSL certificate for the RADIUS server. Our AD is to big to rename it. We already thought about using our private PKI and rollout the CA certificate via GPO but that would only cover our corporate managed clients but not the BYOD (Smartphones, Tablets, Laptops..) Is there a way to add a secondary domain name like “company2.ch” and issue a public certificate and join that radius to that secondary domain aslwell, and configure that secondary dns suffix via DHCP for all the client pools... or is there another way with for example a new radius server which has his own domain company2.ch which is connected with some kind of trust between the company.ch doamin? sorry i'am not a client server guy.. hopefully you get my drift.!?

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  • What is the peak theoretical WiFi G user density? [closed]

    - by Bigbio2002
    I've seen a few WiFi capacity planning questions, and this one is related, but hopefully different enough not to be closed. Also, this is related specifically to 802.11g, but a similar question could be made for N. In order to squeeze more WiFi users into a space, the transmit power on the APs need to be reduced and the APs squeezed closer together. My question is, how far can you practically take this before the network becomes unusable? There will come a point where the transmit power is so weak that nobody will actually be able to pick up a connection, or be constantly roaming to/from APs spaced a few feet apart as they walk around. There are also only 3 available channels to use as well, which is a factor to consider. After determining the peak AP density, then multiply by users-per-AP, which should be easier to find out. After factoring all of this in and running some back-of-the-envelope calculations, I'd like to be able to get a figure of "XX users per 10ft^2" or something. This can be considered the physical limit of WiFi, and will keep people from asking about getting 3,000 people in a ballroom conference on WiFi. Can anyone with WiFi experience chime in, or better yet, provide some calculations for a more accurate figure? Assumptions: Let's assume an ideal environment with no reflection (think of a big, square, open room, with the APs spaced out on a plane), APs are placed on the ceiling so humans won't absorb the waves, and the only interference are from the APs themselves and the devices. As for what devices specifically, that's irrelevant for the first point of the question (AP density, so only channel and transmit power should matter). User experience: Wikipedia states that Wireless G has about 22Mbps maximum effective throughput, or about 2.75MB/s. For the purpose of this question, anything below 100KB/s per user can be deemed to be a poor user experience. As for roaming, I'll assume the user is standing in the same place, so hopefully that will be a non-issue.

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  • How do I determine how future-proof and stable a router is?

    - by Aarthi
    I mentioned in my last question that my wireless router had a bad habit of crashing. After consulting with the Super User chatroom, as well as my sysadmin, I've decided I may as well purchase a new router. However, I'm unsure how to evaluate all these tech specs that get touted about. The two things that seem to be the most important to me are: (1) keeping my router future-proof (as standards evolve and change), and (2) ensuring its stability. Unfortunately, I'm not sure what, exactly, I should be looking for in the tech specs or the item description that can give me a good idea of how stable or future-proof my decide will be. What should I look for? Can I determine stability without having to try the device out myself? Please note: I'm not a battle-hardened power user by any means, so I'll likely be reliant on the given firmware for my router. My last router lasted me like four years, so I mostly just want something that'll cover a 500 sqft apartment in New York with minimal crashing, so that I can watch Hulu in peace. And make Skype calls. If it helps, the router models that I'm currently decided between are this ASUS one and this LinkSys one.

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  • How to host an ssh server?

    - by balki
    Hi, I have a broadband internet connection. I have an wireless modem (Airtel India). I don't have a static ip address. I want to host a ssh/web/ftp server to be visible to the outside world just for testing and learning purpose so I can ask my friend to connect to my current ip address and test. My modem has an admin interface which allows to port forward and open ports. I set up ssh server as shown and checked if port 22 is open using this website , Port Scan And port 22 is open. I have an openssh server running and it works if i do, ssh [email protected] which is my local ip address but doesn't work if i do ssh [email protected] where 122.xx.xx.xx is my external ip address of my modem which i checked from whatismyipaddress.com. Since it looks like the port is open, I wonder if there is some setting I need to change in my server config to expose my server. How should I go about solving this?

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  • Games consoles won't connect through the TP-Link TL-WA500G Access Point

    - by Manfred Wolff
    I hope that someone can help me. I have several Laptops and other devices, all using my Wireless Router (Sky Digital Netgear) To extend the range to the back of the house, I purchased a TP-Link TL-WA500G Range extender. configured just as a pure repeater, it picks up the signal from the Netgear Router. The Netgear Router does the DHCP, handing out the IP addresses. This all works a treat with several different laptops and my iPone4S, but when my son tries to use his XBox360, Sony Playstation3 or the Nintendo Wii those devices fail to acquire an IP address. They just sit their waiting for the IP config. This also happens with my wife's HTC desire ONE Android phone. My son says that, when his HTC Desire C won't get an IP address, he just unplugs the AP briefly - the phone will connect and he puts the AP back on. Once he is connected to the Router, the AP won't disturb function. The Games Consoles don't seem to work like that. They stop working, when the AP is reconnected. I had my son try to configure permanent IP addresses, and he said that did not work either, though I have to confirm that, as I did not see that for myself. Has anybody seen this before? I have searched the Net and have not found any similar problems anywhere. I wonder if there is setting somewhere that would fix this. Many thanks for anyone reading this and trying to help. M

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  • How to troubleshoot Linksys E4200 Remote Management

    - by Jordan
    My Linksys E4200 is configured for Remote Management, but the router is not accepting the connections. Here's the configuration under Administration Management Remote Management Access: Remote Management: Enabled Access via: HTTP Remote Upgrade: Disabled Allowed Remote IP Address: Any IP Address Remote Management Port: 8080 The router is setup to use 192.168.10.41 as its static Internet IP address, and 192.168.35.1 as its LAN IP address. I can access the router just fine via its LAN IP address, but I can't make a connection using http://192.168.10.41:8080. I've tried variations of the settings above (enabled HTTPS, enabled Remote Upgrade, set an IP range of 192.168.10.1-254) but nothing has worked yet. Hoping someone can at least point me in the right direction. Thanks. Update: To clarify, I have a wired router that connects straight to the T1 modem. It's configured to use 192.168.10.1-254 as its internal LAN range. The E4200 wireless router in question is on that LAN using 192.168.10.41 as its WAN IP address. The E4200's internal LAN range is 192.168.35.1-254. I'm not trying to access the E4200 from the Internet, I'm just trying to access it from its WAN IP address. Thanks.

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  • bluetooth GPS device in J2ME emulator / Wireless Toolkit

    - by hsmit
    I'm developing a j2me application for my mobile phone (a Nokia). I'm using WTK (Wireless Toolkit) to test my code. Because I'm using a GPS device via a Bluetooth connection, I would like to be able to extend the emulator with bluetooth possibilities. Has anyone experience with BT & WTK? according to this article there is no way to do it by default. Any other ideas?

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  • API to set credentials for wired 802.1X in Windows

    - by crimsonbloat
    Hello, Is there any API to set user credentials programmatically for a wired 802.1X profile in Windows Vista/XP SP3 ? The corresponding API for wireless is WlanSetProfileEapXmlUserData (...) or WlanSetProfileEapUserData (...). Can the same functionality be achieved for a wired 802.1X profile is some way ? Thanks, crimsonbloat.

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  • Technologies and standards in a Kindle

    - by danke
    I'm using the Kindle as an example of an embedded system to illustrate some points I'm making in a paper. Since I'm not an expert in all the technologies used, can those aware of them point them out. For example: the GUI is programmed in embedded Java (which is probably a bad choice) Whispernet is used for the wireless platform What are the libraries or underlying technologies and standards that this device uses?

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  • Multiplayer game

    - by j-t-s
    Using either XNA OR just the usual c# win forms application, which would be the best way to create the feature that enables text messages to be sent from me to my friend over the internet? I don't know if this matters or not, but I now have 3 Mobile Broadband internet... so it's like... Wireless internet, does that matter?

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  • Issues getting a Cisco WLC 5508 to find AIR-LAP1142N

    - by user95917
    hoping someone can help me with a problem here. I'm attempting to setup a test (loan from Cisco) wireless network. Here's what i've got/done: 5508 Controller - Service Port IP set to 10.74.5.2 /24. Management IP set to 10.74.6.2 /24 with a default gateway of 10.74.6.1. Virtual IP set to 1.1.1.1. Copper SFP in slot 7, CAT5 (known good) going from there to port 1/0/47 on the switch. Green lights on both ends. 2960-S Switch - Vlan1 - 10.74.6.1 /24. dhcp pool 10.74.6.0 /24, default router 10.74.6.1. excluded-address 10.74.6.1, 10.74.6.2. 1/0/4 on the switch is set to switchport mode access and no shut. 1/0/47 on the switch is setup to switchport mode trunk and no shut. 1/0/4 has a CAT5 (known good) cable going from there to the AP. When I do a sh cdp nei from the switch, i can see the AP and Controller listed. When i configure my PC's nic to 10.74.5.5, and plug a cable from my nic to the SP port on the controller i can get on the device via the gui. In there, the only errors/info that show up in the trap are: Link Up: Slot: 0 Port: 7 Controller time base status - Controller is out of sync with the central timebase. I've manually set the time but apparently that's not quite the problem (or at least not the entire problem). When i plug the AP in, i see on the switch console that it grants it power, it sees it connect...but the controller won't see it for some reason. From what i've read you shouldn't have to do anything to the AP as it's managed by the controller...but i'm not sure what setting I'm missing for it to work. The AP light on top is continually cycling green, red, yellow. When I first start it up, it blinks green for 20 or so seconds, then goes to solid green for another 20 seconds or so, then flashes blue, green, red for awhile...but always ends up goinn back to the standard, green, red, yellow. Does anyone see any obvious issues with my setup or have any suggestions as to why i might be having a problem? Thanks for your help!

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