Ubuntu Security :: 64 Bit Kernel Would Be More Stable Secure And Reliable Than A 32 Bit One ?
Jul 7, 2010
Since all what I can find on google is about benchmarks I'd like to ask you if a 64 bit kernel would be more stable , secure and reliable than a 32 bit one.
I ask this question because apparently the 64 bit instruction set offers more advanced security features (i'm saying apparently because I'm not able to give details since it been a really fast read) which would be used by a 64 bit Operating System (Apple also stated that 64 bit applications are less likely to be "attacked").
I have to assume that a 32 bit one does not use them right? Should I stick to 64 bit? (to be honest that "not for everyday" thing on ubuntu download pages made me wonder lol, because since intrepid i ALWAYS used the 64 bit version)
My "lowest" computer has a pentium processor (1,6 ghz dual core) according to lshw I have NX enabled and my ram is 2GB (might seem useless using a 64bit kernel on 2 GB but i'm more concerned about security now)
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Nov 20, 2010
I am seeking for a secure and reliable mp3 and video player. For security reason, I'm reticent about Universe repository. Any way to get my MP3 player and my video player to work without having to resort the Universe repository? Preferably can play RMVB files.
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Dec 27, 2010
how to setup a secure and reliable server, i have three ubuntu 10.10 servers a Dell PowerEdge 850,1850 and 2850 which has a Dell PowerVault 220s attached to it.The Dell PE850 Server Consists of:
Intel Pentium D 3.0GHz
4 GB RAM
Eventually 2x250GB Sata Hard Drives
The Dell PE850 Server Consists of:
2xIntel Xeon Processors 3.4GHz
4 GB RAM
2x76GB SCSI Hard Drives RAID 1
The Dell PE850 Server Consists of:
2xIntel Dual Core Processors 2.8GHz
4 GB RAM
6x76GB SCSI Hard Drives RAID 5 (pretty sure)
Dell PowerVault 220s
I would like to setup a reliable webserver, mail server, DNS and Dynamic DNS, DHCP, SQL, FTP, Samba (with Roaming Profiles), PXE Boot Server.I know how to setup most of the server modules, i would just like to know the best way to do it tho. I also want to no how to setup the secuity of the system correctly, and setup and partition up my hard disks to allow for the best reliabilty, even when a server crashes.I would like to now how to set these servers up from start to finish in a sence.
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Aug 26, 2011
Does anyone know if this kernel patch has been applied to any 11.04 kernels? [URL]
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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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Aug 2, 2010
As far as I know, servers are stable and don't go down easily, but every single server will eventually go down some day, either from hardware/software failure or from hacking.
But as sysadmins, our job is to keep servers running healthy as long as possible.
So I'm conducting another short survey (I might start more survey threads, and thank everyone for kindly replying my previous post):
1. Have you encountered server failures? What's the most common cause for server failure?
2. What is your most important trick in avoiding your server go down?
3. What security rules do you follow to protect your servers?
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Jun 20, 2010
I installed a fresh copy of Slackware 13.1 (stable) on one of my media servers and I am experiencing something strange.... When I power up the machine, I see the kernel booting, no errors, until it gets to the point where it says:
And then randomly freeze there.... Well the machine is not totally frozen because the cursor still blinks. But it will never continue... Like I said, this happens on a random basis... After a reset, it might go through or simply stall at the same spot.
I remember after installing Slack 13.1, I rebooted the machine but forgot to remove the DVD from the player, so the install routine started up, and froze at the same point when it was loading the kernel for the setup programs...
My mobo is a MSI k9N platinum.
I never had this problem before.... (well I never used 13.1 before). Since I got this machine, I used slack 12.2 and slack 13-current with success.
This problem makes the machine extremely unreliable because I intent to use it as a backup and media server, so chances I will WOL the machine and use it remotely... if that happens.
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Jul 11, 2010
I seem to be missing a secure.log or security.log file. I have Ubuntu 10.04 and can't find this file. I looked in the /var/log and ran a search command to no avail. Does anyone know where this file is or is it called something else. I'm looking for a file that logs any change to the security settings of the system.
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Oct 28, 2010
Can someone tell me which is the latest stable kernel version available in the repositories?? Is it 2..6.35-22 ??? if so, when will 2.6.36 be available??
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Mar 14, 2011
Any idea if there is a kernel 2.6.37 stable, for Squeeze? Packaged one preferably , if an address is given for download, if there is one.
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Mar 19, 2011
I used to install the latest kernel for opensuse 11.3 from this repo:
Index of /repositories/Kernel:/stable
but for 11.4 it is empty. I can see that for 11.3 the 2.6.38 kernel is already built.For 11.4 there is only the Kernel:/HEAD repo. Are we going to have a kernel:/stable repo for 11.4?
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Feb 10, 2010
kernel with which most version number may be compiled in Debian 5 stable without updating to testing? 2.6.32.8 can't compile, if not turn off virtualization, since Documentation/least/least.c
contains
#include <sys/eventfd.h>
which is present in libc6-dev from testing, but is absent in stable.To drivers compiling kernel used own linux/eventfd.h.
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Aug 26, 2009
Which is the current stable version of kernel in fedora 10 and how can I installed because right now I have unstable kernel:
uname -a
Linux blind 2.6.29.3-60.fc10.x86_64 #1 SMP Sat May 9 04:18:14 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
I just want to get back to latest stable kernel of fedora 10. I'm not able from the grub to choose an older because there are only kernels for fedora 9. The problem was that previously I used fedora 9 however I upgrade it but it was still with kernel of fedora 9 so I pick it the unstable of fedora 10 and I installed it. Right now I just want to get back to current version of kernel in fedora 10 so I can upgrade it to fedora 11.
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Oct 26, 2010
I applied the security updates from October 20th, which included Firefox and Thunderbird, but I did not see one for Seamonkey. Since then, Seamonkey is warning me that there's an update available for it too -- as usually happens when Firefox is updated.Is there an update to Seamonkey that's available for -stable? Did I miss it somehow?
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May 19, 2011
can't use catalyst driver, virtualbox refuse to run, selinux problems,I want to know if its possible to install only this new kernel 2.6.38 without "contaminating" the rest of my installation with unstable packages?
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Jan 21, 2010
I just ran "yum update" to download the latest kernel from the repository, and noticed that it's 2.6.18-164.11.1 while the latest on www.kernel.org is 2.6.32.4.Out of curiosity, why is there such a discripency between the two? Lack of resources to test and build binaries?
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Dec 27, 2010
how can i make 1000fps stable kernel
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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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Sep 19, 2010
Is there any way to secure harddisk accessbility ? i want encrypt my hard disk, and partitions that ubuntu installed on that. is there a way ? i want deny all access to hard disk, just my own root account can have access to all.
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Feb 19, 2011
Ok im new, i know apparmor is running. i was looking for firestarter but their isnt one.....how do i secure this server? i want a good firewall and some virus protection!. also do i need this?
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May 25, 2011
I want to set up a website that hosts very confidential business information. The info needs to be accessed by multiple people in different geographical regions. The entire website would require the high security (ie: there are no little sections that are publicly viewable). While the site will be run with Ubuntu server, I will be hosting it in Amazon's EC2 cloud.
So, if I use the HTTPS protocol with an SSL certificate, am I pretty well reaching the most secure possible situation? Are there any concerns with using the EC2 solution? Obviously there are a LOT of variables involved with maintaining website security, but I want to know if HTTPS is the current best bet (in addition to all the "best practices" of securing a site) or if there is a more robust way of securing content.
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Jul 27, 2011
what is the best option to securing server via firewall and iptables?
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Jul 20, 2011
I've never understood the difference between these terms in http://www.kernel.org:
- snapshot
- mainline
- stable
- longterm
It's not in Kernel's FAQ and I can't find about it on Google.
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Apr 5, 2011
I am using OpenSUSE 11.4 64 bit with GNOME. I also use the Tumbleweed and Packman for Tumbleweed repositories. Accoording to uname -r, my current kernel version is 2.6.37.1-1.2-desktop.
How do I safely update to the latest stable kernel version?
I am new to OpenSUSE. Please provide step by step directions.
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Feb 3, 2010
I am running UFW, which is set to deny everything but SSH on port 22, OpenVPN on port 1194 and HTTPS on port 443. SSH is set to only allow private key logins, and the root account is disabled. I have AppArmor running for all of my daemons (OpenVPN, Apache2, OpenSSH) and I have Fail2Ban running.
Is there anything else I can do to secure my server from the Internet (it is directly connected, there is no NAT between the Internet and my server).
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Feb 4, 2010
If I need to get a file to someone I could place it on the server and somehow automate an email telling them there is a file available. They could login to the server based on their email address and a randomly generated key combination and down load the file.I also need it to preform the same function going the other way. Login into my server and place files going to me.
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