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• Ubuntu USB flash boot drive gets spontaneous "Unhandled sense code" error and causes drive to switch to Write protected

  - by Steve

  What happens is that the system runs fine for several days or even a week and then suddenly the root file-system / goes read-only. Looking at the syslog it shows that there was an 'Unhandled sense code'. This is under Ubuntu 10.04 but I saw the same thing with Ubuntu 9 with different flash media. /dev/sdg1 on / type ext4 (rw,errors=remount-ro) Jun 26 08:50:04 host1 kernel: [926247.565090] sd 5:0:0:0: [sda] Unhandled sense code Jun 26 08:50:04 host1 kernel: [926247.565094] sd 5:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Jun 26 08:50:04 host1 kernel: [926247.565098] sd 5:0:0:0: [sda] Sense Key : Data Protect [current] Jun 26 08:50:04 host1 kernel: [926247.565103] sd 5:0:0:0: [sda] Add. Sense: Write protected Jun 26 08:50:04 host1 kernel: [926247.565108] sd 5:0:0:0: [sda] CDB: Write(10): 2a 00 00 46 29 18 00 00 08 00 Jun 26 08:50:04 host1 kernel: [926247.565117] end_request: I/O error, dev sda, sector 4598040 Jun 26 08:50:04 host1 kernel: [926247.569788] Buffer I/O error on device sda1, logical block 574499 Jun 26 08:50:04 host1 kernel: [926247.574677] lost page write due to I/O error on sda1

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• 56.6 Modem with CallerID

  - by Fuod

  Does anyone still know anything about the 56.6 modems? I'm looking for one that is easy to access via C#/VB.Net, has Caller ID and is either low-profile or USB. Also that neat little feature that lets the modem block the call from the phone (pass-through) until it has received the CallerID info would be really nice! Obviously I could just go to Best Buy and get what they have but I have no way of knowing how friendly it would be to write code for and I don't want to make multiple trips returning/exchanging etc. I'm not going to be doing anything with voice or voice mail, just recording the number from CallerID. Thanks!

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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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• Limiting to the ServerName in Apache2

  - by David

  I have 2 sites defined in my Apache2. Each one has a servername. For example: Server 1 (first in sites-enabled) responds to www.example.com Server 2 (second in sites-enabled) responds to www.example2.com Ok, the problem is when I type the server IP in the URL, the first server responds. How could I limit the response to only specifying its servername? I would like to block the IP calls. If that is not possible, I would like the second server to respond, not the first. I cannot change the order because there are aliases defined in the second server that would override the first server config.

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• Route SOAP request through external server

  - by sanbornm

  I need to integrate with a SOAP Web Service that requires that the requests come from a whitelisted IP address. As I often do development from all over the place it is quite annoying to ask for a new whitelisted IP each time. I have a remote server that is whitelisted. How can I route my SOAP request (I can change the endpoint in the WSDL) to my remote machine and have that forwarded to the Web Service? My remote server is used for other things so it needs to only forward a specific port, not all traffic. Oh, and the Web Service expects SSL.

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• Squid 2.7.6 not honoring ACL rules

  - by peppery

  Hello there, I have a /24 block of IP addresses assigned to a single server that I have been attempting to install Squid on an Ubuntu server machine. All of the IP addresses are set up correctly (aliases of eth0) in /etc/networking and work as they should be, using cURL I can specify an interface and it goes out on the correct address as it should be. I would like Squid to take the incoming IP address the request was sourced to and proxy the request out on the same IP (e.g incoming 123.123.123.1:3128 - 123.123.123.1, .2 - .2, etc) and have set up these ACL rules in /etc/squid.conf acl ip1 myip x.x.x.1 tcp_outgoing_address x.x.x.1 ip1 acl ip2 myip x.x.x.2 tcp_outgoing_address x.x.x.2 ip2 acl ip3 myip x.x.x.3 tcp_outgoing_address x.x.x.3 ip3 and so on, as this seems to be the only way to do what I want (from research). However, after much frustration, Squid seems to be ignoring these rules and sending requests out on the default interface. Does anybody have any suggestions? Thanks.

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• What are the minimal iptables rules to surf the internet?

  - by alexx0186

  I am trying to set minimal rules to my Linux iptables rules file to just be able to surf the internet. Here what I did: * filter -A OUTPUT -p tcp --dport 80 -j ACCEPT -A OUTPUT -p tcp --dport 443 -j ACCEPT -A OUTPUT -p udp --dport 53 -j ACCEPT COMMIT With just those rules, I can't surf the web. I noticed that when I put -A INPUT -j ACCEPT, it works but I don't understand why. So what Input/output port do I need to surf the internet? Thanks a lot. Regards EDIT: It still doesn't work and my rules as as follows: # generated by iptables-save filter :INPUT DROP [10:648] :FORWARD DROP [0:0] :OUTPUT ACCEPT [10:648] -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPTED COMMIT

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• Is there good FAT driver for FUSE? (Lightweight, not mountlo)

  - by Vi.

  FUSE filesystem list show some FuseFat and FatFuse. Both are old, FatFuse is read-only , FuseFat is non-buildable and probably depends on glib. Now I'm using mountlo for the task (mounting USB drives in generic way without root access or suid things (except of fusermount itself)), but it looks too big for such task. Using FUSE to mount external storage devices is good both for security and for flexibility reason: the kernel sees only block reads and writes while actual code that deals with filesystem details runs with user privileges, allowing user to use custom filesystems and preventing from kernel filesystem exploits. Is there good vfat FUSE driver?

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• Vostro 1520 crash during bios update

  - by Deadmilkman

  My Vostro 1520 (P8700 C2D) originally came with BIOS A02. This bios version have known problems with VT, so I had to upgrade to A05. During the upgrade, the notebook crashed. Needless to say, it won't boot anymore. The simple question is: is there a way to access the bios boot block to recover the bad flash with a crisis disk? I know that the MINI and the ALIENWARE models have this feature, but I can't seem to find anything about it in the Vostro machines. Any help will be much appreciated. PS: Dell's solution is to change the motherboard, but it will take several days, as the board isn't available in my country :( Regards, Deadmilkman

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• IIS: Can't access my site

  - by Markus

  Hi I have Windows 7 Professional. With IIS 7 or 7.5 I have set up a little website. So far all works fine on http://Localhost:80 - I can see the site. Then I set up the firewall so port 80 is open. My Router routes TCP:80 to my pc. But from my second pc I cant access the site. I can ping the other pc but why I can't access the page through the LAN? Please help!

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• iso9660 filesystem when remade with a slight change blows its size by 100M

  - by user1458001

  I have an iso 9660 filesystem image in which I need to edit just one file. I copied the files using cp -avf. When the files reach the destination, the sizes increase. That must be due to the increase in block size. But when I remake the iso9660 filesystem using mkisofs -J -U -r the sizes of the files remain the same and just a small editing in a file leads to a blow up of about 100M in the newly created iso image. I think I'm missing some option there, but I'm not able to find out in the manpage and google search. Some quick help would be greatly appreciated as I'm stuck. My host filesystem is ext3..if that's required.

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• Server spec for a small business [duplicate]

  - by I'll-Be-Back

  This question already has an answer here: Can you help me with my capacity planning? 2 answers I will need to buy a decent server for Windows Server 2012 and Linux for Web server (Internal use only - Intranet). I will install ESXi with 2 or 3 VM's. There will be about 80-100 Agents at work, they will login (domain controller) on client PC in the morning (between 9:40am to 10:05am). They can only use IE browser and everything else will be locked. They will not have any storage space, no email, etc. Is this spec decent enough? 2u Supermicro 825 chassis, X9SCL-F x1 Intel E3-1290v2 16Gb DDR3 x2 Intel 520 Series 240Gb x2 2Tb Seagate Barracuda, LSi 4 port SAS raid controller

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• How does a Promise FastTrak 133 interleave a striped array?

  - by Jemenake

  I co-worker had two drives configured as a stripe on a motherboard with an on-board Promise FastTrak 133. The motherboard failed, and we've been unable to find any others with an on-board Promise controller which can recognize the array. With Linux or some disk editors, I can see data on both drives... and I want to see if I can combine the data from both drives onto a single, larger drive. But I need to know how that information is interleaved on the drives. I've tried dmraid on Linux, but that doesn't recognize the drives as an array. I guess I could just try combining alternating blocks from the drives, starting with a block size of 256B and keep doubling until I get a result that looks intact. But I'd like to avoid that if someone already knows how Promise controllers spread the data over a striped array.

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• Access logs show someone "GET"ing a random ip, why does this return 200?

  - by Wilduck

  I have a small linux box set up with Apache as a way to teach myself Apache. I've set up port forwarding on my router so it's accessible from the outside world, and I've gotten a few strange requests for pages that don't exist from an ip address in China. Looking at my access_log shows that most of these return 404 errors, which I'm guessing is a good thing. However, there is one request that looks like this: 58.218.204.110 - - [25/Dec/2010:19:05:25 -600] "GET http://173.201.161.57/ HTTP/1.1" 200 3895 I'm curious what this request means... That ip address is unconnected to my server as far as I know, and visiting it simply tells me information about my uid. So, my questions are: How is it that this request is showing up in my access_log, why is it returning 200, and is this a bad thing (do I need to set up more security)?

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• Run SSH trough a proxy

  - by Row Minds

  I have a question. How can i run SSH trough a proxy or a SSH Tunneling Protocol? For example i have a computer(Ubuntu) with ip eg. 123.123.123.123 and i want to connect to my server trough a proxy eg. 111.111.111.111 so i can see in lastlog that the last authentication was made from 123.123.123.123 . I need this because i cannot access a certain server at work only with an specified range IP. What i tried so far was http://daniel.haxx.se/docs/sshproxy.html where i used ssh -D 1 [email protected] -p 443 where i had 127.0.0.1 forwarded to a SSH Tunneling Protocol http://www.nixtutor.com/linux/installing-and-configuring-an-ssh-server/ (i configurated listening on port 443 but no result, still no connection (denied) ...) This question may sound simple, but i can't figure it out, can you please help me? Thanks.

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• accessing external mysql server through "ssh tunnel" - any drawbacks?

  - by Max

  In an upcoming project I have a two server setup: one is the application server and another, already existing runs the mysql server with databases I need to access. I contacted the server admin of the mysql server and the only way I can access the remote mysql databases is via "SSH tunnel". I have never done this before and never heard of it so far, so my question, are there any drawbacks, e. g. performance wise? Isnt it rather slow compared to directly accessing the mysql server on its default port?

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• Event 4625 - Logon Failure - Server 2008 R2 is logging them all over the place ! How to stop the attack?

  - by user72593

  I've been monitoring failed logons to a server which is directly connected to the internet with no hardware firewall in the way...testing purposes only. Using the Server 2008 R2 firewall, I blocked access to just about everything except RDP, then I told the firewall to only allow connections to the RDP port from "MY" static IP. I tested from other locations and I am not able to login to the server unless i'm at my office. So how are people coming from Chinese IP's able to attempt logons and get logged as failures ?? Is there something i'm missing that needs to be blocked? Any help would be appreciated.

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• Single ipv6 from /64 subnet

  - by PartyPete

  I have a newb question I'd like to ask. We have an dedicated server and we got an ipv6 /64 block. We want to use squid to make proxy and use those IP. And my question now is: Is it possible to use only one IP out of range? for example: let's say I have a range of IPs ffff:ffff::/64, and want to use only one address from it: ffff:ffff::1/128 or ffff:ffff::2/128 but whenever I set squid like this I always get from 'what is my ip' services whole subnet which is again ffff:ffff::. What I want to achieve is to get from those 'what is my ip' services to send me back IP ffff:ffff::1 (or 2 for that matter) Am I doing something wrong?

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• Do any of the HP printers have implement printer sharing?

  - by BCS

  I've seen several (home grade) HP prints that have network port and allow connecting to them via that. However I haven't seen any way to use it without installing the printer specific drives. This seems a bit silly because I've seen printer sharing system (SMB I think) that didn't seem to need any printer specific software. My question is: Is there a way to use one of these with my printers? (I'm omitting the exact model in the hopes that answers for several models (or a resource that answers it for several models) will be given.)

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• Western Digital Caviar SE16 not recognized

  - by NStorm

  Before I start, I have been looking at quite a few websites and I still have not found an answer to my problem. I have been building my own computer recently and I have just received the hard drive (WD Caviar SE16 WD5000AAKS) I was planning to put in my computer. After connecting the SATA power cable (99.99999% sure it is connected correctly) and the SATA cable to my motherboard (ASUS M5A78L-M/USB3) I booted my computer into a Linux Mint 13 XFCE 64-bit live USB expecting to see a hard drive when I came to install. Sadly when I checked the only hard drive that was showing was /dev/sda which was my USB with the Linux files on it. I also checked gparted and no hard drive other than my USB was showing up there either. Lastly I checked my BIOS and no matter what SATA port I connected the HDD to it wouldn't show up there either. Does anyone have any advice? Some images of my set-up which could help are bellow: Thanks in advance, Nick

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• redirecting arbitrary tcp/udp in kvm

  - by jbfink

  I've got a server with KVM on it, and multiple guest VMs. I'd like a way to redirect traffic from the host server to the VMs. Like, say, forward all traffic on port 2222 on the host to 22 on a guest VM for ssh. This would have to be done either through virt-manager or libvirt XML config files -- I've found multiple references to doing it through qemu (like http://forums.fedoraforum.org/showthread.php?t=237969) but absolutely nothing that I can see related to either libvirt or virt-manager. Do you know how I can do this?

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• iptable rules not blocking

  - by psychok7

  so i am trying to allow ssh access to a certain range of ips (from 192.168.1.1 to 192.168.1.24) and block all the rest but since i am new to iptables i can't seem to figure, i have : iptables -A INPUT -s 192.168.1.0/24 -p udp --dport ssh -j ACCEPT iptables -A INPUT -s 192.168.1.0/24 -p tcp --dport ssh -j ACCEPT iptables -A INPUT -p tcp --dport ssh -j REJECT iptables -A INPUT -p udp --dport ssh -j REJECT but this does not work, with a vm set with 192.168.1.89 i can still access through ssh. can someone help?

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• Writing directory: permission denied even though dir seems to be chmodded correctly

  - by Aron Rotteveel

  I am having some trouble creating files in directory on my Ubuntu machine: I added myself to the www-data group in order for me to easily edit stuff in my /var/www dir on my development machine. stat /var/www shows the following: File: ‘/var/www’ Size: 4096 Blocks: 8 IO Block: 4096 map Device: 808h/2056d Inode: 142853 Links: 3 Access: (0775/drwxrwxr-x) Uid: ( 33/www-data) Gid: ( 33/www-data) Access: 2010-12-30 16:03:18.563998000 +0100 Modify: 2010-12-30 16:02:52.663998000 +0100 Change: 2010-12-30 16:03:13.111998001 +0100 Still, it is impossible for me to create anything below /var/www (the only way for it to work is to chmod it to 777. What am I missing?

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• Is there any IP which refers to the internet?

  - by victorferreira

  Hello, guys, good morning. 127.0.0.1 is the local IP, isnt it? Is there a IP that I can use in order to refer to the any user in the internet? The thing is: i want to block a specific file to be accessed by the internet using IIS6. but i doesnt show me a clear way to do this. But i can define some security rules, for example: give IP restrictions for some file. So, i can deny for everybody (using that IP i am asking about) and allow for the internal IP. any suggestions?

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• Forward external traffic to 127.0.0.1

  - by user2939415

  I have an HTTP server running on 127.0.0.1:8000. How can I use iptables or something to route external traffic to it? I want to be able to access my.ip.addr:8000 from my browser. iptables -A PREROUTING -i eth0 -p tcp --dport 8000 -j REDIRECT --to-ports 8000 does not help EDIT: To test whether or not this works I am using the following node.js script: // Load the http module to create an http server. var http = require('http'); // Configure our HTTP server to respond with Hello World to all requests. var server = http.createServer(function (request, response) { response.writeHead(200, {"Content-Type": "text/plain"}); response.end("Hello World\n"); }); // Listen on port 8000, IP defaults to 127.0.0.1 server.listen(8000, "127.0.0.1"); // Put a friendly message on the terminal console.log("Server running at http://127.0.0.1:8000/");

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