Ubuntu :: Vpn - Software That Can Install On 2 Computers To Have A Secure Communications?
Jan 3, 2011
A relative will soon be traveling to China to adopt a child. China is cracking down on communication tools like Skype. Some people are using Virtual Private Networks (VPN) to ensure they can communicate with families back home. I know nothing about VPNs so I have some questions.
1. Is VPN some kind of software that you can install on 2 computers to have a secure communications?
2. Is there something in Ubuntu's Software Center that I should try?
3. If China is cracking down on external communication, is VPN the best tool to ensure communication back home?
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Mar 7, 2010
How to design secure fault tolerant network (routers, firewall, domain servers, etc) of 300 wireless computers separated in multiple buildings and floor with multiple users for each station mainly utilizing dtp and internet software?
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May 5, 2011
having used SuSE Linux ever since the April 1995 release, I thought installing 11.4 would be a straightforward task. Since it wasn't, I'm summarising here my experience. My PC is built around a 3-year old Asus P5B-plus mainboard, i.e. certainly not brand-new hardware.
1 - on installation, my "Atheros Communications L1 Gigabit Ethernet (rev b0)" wasn't recognized, so I had to "modprobe atl1" from one of the consoles available during installation. That worked but the installer didn't pick up the fact that network was now available.
2 - after completion of the installation, online-updating for the first time and installing the nvidia driver for my "nVidia Corporation G71 [GeForce 7300 GS] (rev a1)" the KDE desktop showed the "blank desktop with mouse pointer" syndrome. Googling yielded that desktop effects had to be disabled in the kwinrc configuration file.
3 - logging in today after an online update, firefox (MozillaFirefox-4.0.1-0.2.2.x86_64) segfaults on start-up while loading the default website (opensuse.org). firefox will run in safemode but it won't run in normal mode, even with all add-ons disabled.
Now I don't have a useable system after a couple of hours of trying. Fortunately, I have a working installation of openSUSE 11.2 but I believe that updates for that distribution will be stopped shortly.
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Dec 1, 2010
I'm an Oracle DBA and started working for my current employer about 4 months ago. This past weekend an alert re: FS space brought my attention to /var/spool/clientmqueue (full of mail re: cron jobs) and the fact that sendmail is not running on our Linux servers.I'm told that the IT security team deemed sendmail too vulnerable so we don't run it.Aside from FS filling up and missing notification of issues with crontab entries, I'm concerned that we may be missing notification of potential issues. In other Unix/Linux environments I've seen emails from the print daemon when it experienced problems with specific jobs.
Are there other Linux facilities aside from cron and lpd that use email to advise the users of possible issues? Are there ways to secure sendmail or secure alternatives to sendmail? My primary need/desire is to make sure that emails regarding issues on the server get to the appropriate users. Secondary goal would be to have the ability to use mailx to send mail out. There is No need/desire to receive mail from outside.
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May 21, 2010
I am wanting to set-up serial communications between my server (ubuntu 9.04) and a picaxe chip (a pic with a bootloader) I need to send data in the format of "1,1,1" or "1,1,0" at 9600 baud 8 data bits, no parity, 1 stop bit and no flow control. the data must be sent as numbers not ASCII I have tried
Code:
echo 1,1,0 > /dev/ttyS0
Any simple shell script or even python.
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Dec 7, 2010
I'm running Ubuntu 10.10 desktop in a VirtualBox VM on a Windows 2008 host machine. The end goal is join the the Ubuntu VM to a Windows 2008 domain. I've downloaded likewilikewise-open_5.4.0.42111-2ubuntu1.2_i386.deb se-open_5.4.0.42111-2ubuntu1.2_i386.deb to get the joining of the VM to the domain. But from this point forward, I'm completely lost.
1) How do I implement this likewise package?
2) How do I get files from my Windows 2008 host to the Ubuntu guest VM?
The likewise file is burned to a DVD. When I try to read the DVD, I get the "My Disk" icon but only one file gets displayed. In other words, the DVD the likewise file is burned to has a ton of files. Ubuntu doesn't see any of them expect one .exe file. The /etc/fstab had no entry for cdrom, so I put a line in that says
/dev/hdc /media/cdrom0 udf,iso9660 user,noauto 0 0 rebooted and that didn't do squat. There is no entry /etc/cdrom but there is directory /etc/My Disc. And I suppose that's what gets mounted because I can see one file on that disc. So then I thought, to hell with the DVD drive and I'll just get the Linux guest to see a "shared drive" on the host. I shared out a folder on the host via the Virtualbox "shared folders". But how I get the Ubuntu guest to see this shared folder is as big a mystery to me as is the creation of life.
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Jan 31, 2011
im trying to connect two computers on lan.One computer has: VMWare Workstation and has Opensuse 11.3 mounted in it.The other computer has: VMWare Player and has Opensuse 11.3 mounted in it.Both computers are connected to a switch with cables.I have followed this guide in both computers:Depanati singuri calculatorul!: Opensuse 11.3 - configure local networkin order to setup a network.In one computer, if i go to: Computer---Network---Network folder, i only see one machine. When in fact i could see both of them right
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May 16, 2010
I've just set up an LTSP server, with all its clients on a separate subnet to my main network - the main network is 192.168.1.x, and the LTSP clients are all 192.168.2.x. My LTSP server has 2 NICs, one on each network, and is merrily forwarding normal IP traffic from the clients to the rest of the network. I have a client/server application that has a server on one machine, and clients locate and attach to it using multicast protocols. The server is on the main network, and any other machines on the network can locate and talk to the server quite happily. The LTSP clients, however, cannot - I assume because the multicast communications aren't being forwarded by the LTSP server. How I can get this working?
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Jan 8, 2010
I can't find a way of getting them to talk or exchange data, esp. pics.
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Sep 2, 2010
I have two linux boxes A and B. Each of them have serial ports (ttyS0 on both) and these ports are connected using null modem serial cable. "A" box is always on and it has getty process on its ttyS0 (I need this getty for serial communication). If I reboot box B, it doesn't boot default entry - just displays grub os select table. After some investigation I realized that getty process on A sends some data to grub on B while it's booting and grub behaves the same way as if some key is pressed during timeout period - it doesn't boot default and waits for interactive user response. I need to reboot B remotely so its no good for me.
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Sep 15, 2010
I have an application written in C (by somebody else) monitoring a device connected to a serial port. I'm using an old laptop w. tinycore linux for an os. The app works well enough, and the communication speed is relatively slow, 9600bps, unidirectional, comes in packets of 18 bytes. The app is just picking apart the packets and displaying the contents on a formatted screen (ncurses), updating about once every 1/2 second. The trouble is, the app is polling the serial port and using *all* of the cpu bandwidth. The cpu fan runs full bore all the time.
Other activities are sluggish when the monitoring program is running. I'd like to modify the app to be a little more intelligent, use a receive buffer and interrupts to trigger processing each packet and, most importantly, not poll in a tight loop waiting for data. I'm not sure where to start, but I'm convinced this isn't that complicated of a change. Is there a good resource that would explain the basics of reading data from serial port software buffers, triggering on interrupts and suspending or sleeping when no interrupt is pending?
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Jan 30, 2011
I'm trying to get WiFi up and running on an older desktop PC. lspci gives me the following information about the WiFi card: 00:0d.0 Ethernet controller: Atheros Communications Inc. AR2413 802.11bg NIC (rev 01) Is there an RPM package for the driver that I need? If no, what should I do to install the driver manually? The PC in question doesn't have any other form of direct internet access. It does have an Ethernet port, but the WiFi router is too far away to hook it up to the access point directly.
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May 21, 2009
I am running kubuntu 9.04. I have minicom, Gtkterm and Putty installed. minicom seems to be really good, but I am missing scroll back functionality on there. Either that or I'm a novice with it and don't know how to do it. Putty is a GREAT app. But what I'm finding is that after the terminal runs for a bit, the screen shows characters from the previous lines and goofs up the output. If I move the window, the gibirish disappears. gtkterm is adding several empty lines to any of the screen output.
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Mar 2, 2011
I need to install ubuntu 10.10 into 30 computers (using windows XP). I don't want to take each computer, format it and install the new operation system.(That's going to take too much time). Some documentations about the way that I can accelerate this process.
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Aug 6, 2011
I want to use my full Ubuntu install as a PXE boot server for other computers. The aim is to get the client computers into a basic Linux/Ubuntu shell with access to various util commands such as sfdisk, fdisk, ntfsclone and probably a few others (sshfs comes to mind as I type this)
The client computers do not need Xwindows of any sort. Just shell and preferably boot as fast a possible without user intervention until a command prompt. I have seen guides on setting up Ubuntu as a PXE server, but not sure;
a) what variant of Ubuntu/Linux is best for the clients
b) how to make the pxe server, serve up whatever variant is suggested in (a).
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Dec 24, 2010
how secure a default install of Xubuntu desktop 10.04 is when connected to the internet with a routable, public ip address. If anyone can give some recommendations on any changes/additions they would make to improve security
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Jun 23, 2010
I have a portable 320 GB USB HP SimpleSave external hard drive, and I want to install Ubuntu 10.04 Desktop to use on both of my computers when Windows is letting me down. The last time I tried to install 10.04 a week after it came out, I was presented with tons of errors, even though I did it the same exact way I did it with 9.10 that worked. I would like some help on the subject of installing them on usb hard drives. Most the time, it's GRUB being antsy about where it's installed. IF I don't change where to install GRUB, it won't let me boot on any other computer, or USB port.
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Oct 18, 2010
I first tried to use UBCD HDDErase although it won't detect my seagate 1000 GB Sata HD (This worked for my other computer/HD). So I loaded up a OpenSUSE live cd rescue terminal to enter the command (of course after setting a password and making sure HD is not frozen):
time hdparm --user-master u --security-erase uber /dev/sda
The following line appears:
"Issuing SECURITY_ERASE Command, password="uber", user=user
That's all it says and there is no % completed or anything. (as it appears on the wiki)
https://ata.wiki.kernel.org/index.php/ATA_Secure_Erase
Also I can still type but theres no command or console or anything it just is blank if I hit enter.Is my HD being wiped right now? or is it not working?
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Feb 22, 2010
I want to install similar packages on a bunch of computers, how it can be done? I don't want to install them manually on each PC.
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May 9, 2011
i have a question about rpm.pbone.net, www.rpmseek.com and these kind of pages: Can I trust these sites and is it secure to install rpms from these sites on enterprise workstations and servers?
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Aug 29, 2014
I appear to have the exact problem that is currently listed in the 7.6 errata about EFI boot and black screen while trying to install ("Potential issues with UEFI booting on amd64"). The problem is that their workaround is not an option for me. This is a new rig and the motherboard doesn't appear to have any kind of ability to disable secure boot. I also don't know if my problem is exactly what they're thinking when it comes to that entry.
I'm able to get to the Grub install screen where you have the option to install Debian but when I select an option (any option) the screen turns off, back on but is black. All activity in the system stops after a few seconds (3-5 seconds) and that's it, she's done. I've tried all the options to try and disable secure boot but the options listed below are as close as I can get (and apparently should be sufficient).
The CD ISO used was the 7.6 netinst CD. I've also tried the Jessie ISO (Testing) that was downloaded about 2 hours ago. Same results. Unlike the errata which says "intermittent booting problems", my issue is consistently reproduced with no other result no matter what I do.
The rig:
-Asus H97-Plus running revision 2202
-Intel i5-4570
-32GB DDR3-1600
-128GB SSD Drive
-No external video card - using on board only but have tried both VGA and HDMI ports with the same result.
BIOS settings (is it still called BIOS or is it UEFI now?)
-Fast Boot: Disabled
-Launch CSM: Enabled
-Boot Device Control: "Legacy OPROM Only" or "UEFI and Legacy OPROM" (tried both)
-Secure Boot State: Enabled (it's grayed out and I'm unable to change this)
-OS Type: Other OS (supposedly makes it so you can boot non-Windows OS)
The Debian page with the errata: [URL] ...
Look for "Potential issues with UEFI booting on amd64"
The obvious suggestions I've tried:
-tried USB boot & CD boot - same result
-tried altering the grub script to add the ACPI options - no effect
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Nov 17, 2010
I did a port scan on my server from outside my network and saw that port 10080 AMANDA is open.Amanda isn't installed on any of my computers or my server and the port is not forwarded by my modem or router. So why is this port open and how can I close it?
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Mar 5, 2010
I've been using Kate for a while without any problems.
However, today I tried to install Kedit.
Then I got this message:
"There was an error setting up inter-process communications for KDE. The message returned by the system was:
Could not read network connection list. /home/mikeb/.DCOPserver_XXX__0
Please check that the "dcopserver" program is running!"
Then I uninstalled Kedit, hoping that the damage would be undone.
However, Kate still shows the same message upon startup.
So I reinstalled Kate, and got the same thing.
What did the Kedit installation mess up, and how I can I fix it so I can use Kate again?
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Oct 4, 2010
If I install Ubuntu onto a USB, and plan to use it on different computers, can I force it to do a fresh driver detect? Or does it do it already?
I heard a persistent LiveUSB does a fresh driver detection everytime, but I heard it can't be upgraded properly? If I keep my home folder on another partition, would I be able to upgrade the LiveUSB properly and normally?
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Dec 7, 2010
I just installed Ubuntu about 3 days ago and all has been working well and I'm learning to use it more effectively every day. The reason i installed Ubuntu was because I discovered that people i thought were close to me were remotely SPYING ON ME through my computer.Apparently they had access to all my documents And could even hear and see me through my Mic And Web cam.I was using windows 7 with avg anti virus and windows firewall. I would like to be able to use my computer(with they Internet) without having to worry about people stalking me.I would like for it to be practically impossible for these scumbags to get anywhere close to my privacy. I have a router which i connect to with wifi and I'm running the latest version of ubuntu.
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Jan 26, 2010
I set up my ubuntu server with iptables that only allows ssh in the input chain (and of course established connections) with only the mac adress of my laptop allowed to connect, set up a key with a long passphrase and installed pam_abl plugin. ICMP echo is blocked by default.
The only problem is i log all other attempts to connect to the server and i see a lot of traffic going to ports 445 and 5900.
My question is: Is there a possibility that these attempts could succeed and is there any way to further ensure this server?
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Feb 11, 2010
A) Pc-bsd
B) Ubuntu
And also which OS is more reliable?
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Mar 11, 2010
How can i secure grub 2.0 ? with grub 1 just do : grub-md5-crypt then we write password --md5 <crypted_password> in /boot/grub/menu.lst
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May 10, 2010
Is it possible at all to secure transmission?
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Jun 14, 2010
Newbie here,
I'm thinking of moving mostly to linux to get away from the security holes in Windows. And I have some questions...
How secure is Firefox for doing online banking?
Sometimes I have run into a situation where the bank doesn't support anything but Windows explorer when accessing my accounts. Can this be gotten around safely in Linux?
If so, How?
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