i want to performance a test of a network, without using connection-tracking.
how to disable connection-tracking,
i used the following iptables commands to disable connection-tracking,
iptables -t raw -A PREROUTING -p tcp -j NOTRACK
iptables -t raw -A OUTPUT -p tcp -j NOTRACK
but it is not working, when i see /proc/net/ip_conntrack, this file shows the existing connections.
When I have video running and the video stops, I see that the connection is destroyed in about 5 seconds, which is what I want. If, rather than stopping the video, I pull the plug, I have seen it take 350 and 380 seconds before the connection is destroyed. Why is there such a large difference in the time to destroy a video connection between stopping the video and pulling the plug on it when using net filter connection tracking? How can I shorten the time for the connection to get destroyed when pulling the plug?
View 3 Replies View RelatedI do not believe the firewall connection tracking is enabled. I have Centos 5.6 with 2.6.18-238.5.1.el5.centos.plus kernel. I went into the kernel .config and I see CONFIG_IP_NF_CONNTRACK=m. But when I do a lsmod I do not see this module.
View 2 Replies View RelatedOn Kernel 2.6.33.4 I get this from /proc/net/ip_conntrack:
tcp 6 431557 ESTABLISHED src=X.X.X.X dst=X.X.X.X sport=44242 dport=993 packets=128 bytes=9267 src=X.X.X.X dst=X.X.X.X sport=993 dport=44242 packets=85 bytes=53950 [ASSURED] mark=0 use=2
On Kernel 2.6.36.2 I get this from that same file:
tcp 6 431665 ESTABLISHED src=X.X.X.X dst=X.X.X.X sport=4640 dport=8082 src=X.X.X.X dst=X.X.X.X sport=8082 dport=4640 [ASSURED] mark=0 use=2
It's missing the data on bytes and packets transmitted through that particular connection. I had written a program that uses this information. Was this pulled out of the kernel on purpose or did I miss some option when compiling the new kernel for my box?
On my CentOS 5.4 box I run dns, ssh, and smtp servers. This box also has to be able to resolve and browse websites. So basically it needs iptable rules for
TCP 22 25 80 443
UDP 53
My question is, which of these services work nicely with connection tracking? I'm a little confused about how connection tracking works. For example say this iptables rule for smtp
Code:
iptables -A INPUT -s 0/0 --sport 513:65535 -d $myip --dport 25 -j ACCEPT
versus
Code:
iptables -A INPUT -s 0/0 --sport 513:65535 -d $myip --dport 25 -m state --state NEW,ESTABLISHED -j ACCEPT
So with connection tracking what exactly does it do that my first iptables rule does not do?
Also for centos is that port range correct? 2.6 Linux kernel randomly chooses a port 513-65535 when it connects to an external smtp server or say browses a site.
I had been running "Etch" and upgraded to "Lenny". Now my mouse is NOT tracking correctly. When I move the mouse and then press and release the 'ctrl' key to show where the mouse pointer is the circle indicators are not where the pointer is. I therefore cannot make any selections from menus as 'lenny' thinks the mouse is somewhere other than where the pointer is. Also are there keyboard hot keys that i can use to access the menus?
View 1 Replies View RelatedI just tested Networkmanager on OpenSuSE 11.2. I tried with my wired connection and it works.
I thought I test to connect with network sharing with my Android phone. The Android phone connects according to Networkmanager, but I'm not sure if it actually works as the wired connection is still active.
I tried to figure out how to disable the wired connection, but eventually gave up and just pulled the wired network plug.
But surely, there must be a way to disable connections from Networkmanager?
Is there any way to temporarily "switch off (and back on)" the internet connection on a system (that runs linux)? The following methods are not allowed:Turning off the router. That would lead to a lot of angry young individuals. This method must be particular to my workstation.Use root privileges (coz I do not have them).
Yank the ethernet cable from the system.Why: Sometimes the internet proves to be a distraction.I am using the following system: Fedora release 11 (Leonidas), linux kernel 2.6.30 and GNOME 2.26.3
I have two connections for my PC, my Ethernet which is on the corporate network and my smart phone on 'usb0'. Both have full internet access.I want to stop my PC from connecting to the internet over the Eth0 while still connecting to internal servers then just have internet over usb0.If I go to the settings of 'Auth Ethernet' in the tray area, under IPv4 there is the routings section - I've tried enabling "use this connection only for resources on its network" but it doesnt work.
View 3 Replies View RelatedI purchased an EeePc 900HD (ASUS). Installed EeeBuntu_3.0 when I run "lshw -c network". I got a "DISABLE" status for my ethernet connection. In this forum I read that I need to run:
"ifconfig *logical_hardware_name* up"
The "DISABLE" status is gone but still no ethernet connection in the Gnome-NetworkManager.
writing a script that will enable/disable internet connection on the one of the machines in the network(be it a DNS clearing or something else).
View 3 Replies View RelatedI was recently looking into using tail -f to monitor some text files like so: tail -f /var/sometext However, when I did some testing, it doesn't seem to work. What I did was I created a new file and ran: tail -f /home/name/text Then, I opened the log in vim and did some editing, saved it, and it seems that tail is not "seeing" the change.
The weird thing is, running echo "hello" >> /home/name/text seems to work fine (tail sees the change). I read somewhere this has something to do with file descriptors and new inodes being created when saving a file.
Is there a way of tracking updates without booting into the system. I am still on Karmic because of an annoying 'black screen at boot' bug. However i've got Lucid on a test partition waiting when the bug is fixed to upgrade my main system. I do not want to boot into my test system to check if there are any updates but track them online in some way to see when it's worth to boot to upgrade.
View 4 Replies View RelatedI've been reading an interesting article about the fact that ISPs are able to collect net data from web users. What I think It's missing in the article is that in some locations it's compulsory for ISPs to collect and save all your networking data (For example, in Spain, where I live, it's compusory to store people's activity on the net for a period of 6 months (minimum) to 2 years (maximum). In the article they state that Witopia can do the job of encrypting your browsing activity and therefore mantain your privacy. Do you know any open source or, at least, free alternative to Witopia? What do you think about the article and about the ways of safeguarding your privacy?
View 9 Replies View RelatedFresh install of debian lenny / mostly default load
VLC 1.0.5 install
cd rom
dvd rom
vlc plays cd (no audio but can see tracking of song) but not dvd
fstab (cannot edit -permissions and don't know how to effect the proper permissions)
fstab
/dev/hda /media/cdrom0 udf,iso9660 user,noauto 0 0
/dev/hdb /media/cdrom1 udf,iso9660 user,noauto 0 0
someone recommended changing to
/dev/cdrom1 /""
Don't see how that would fix audio but anyway cannot change fstab.
checked advanced input / codec in VLC
dvd = dev/hdb
cd = dev/hda
Totem -plays the dvd but quality / volume is not there, prefer VLC. Soundjuicer plays the audio with sound nicely. Just would like VLC to do it all.
I've been trying to find a source tracking website similar to Freshmeat so that I can keep an eye on version updates.
I need one because I am trying to build myself a Linux distro from scratch and it would really help if there was a single source where I could see software updates, and download from.
I've introduced myself to OpenCV a bit now and can do some of the most basic things with it. My current goal is to have a solid color object (say a red ball) and have a camera be able to find that object. Anybody know of any resources to start learning how to do this? Any tutorials/books? Or is there something I should be searching for instead of color detection and tracking that will give me things more in the right direction?
View 2 Replies View RelatedQuote:Originally Posted by qweasd cannot wait. I upgraded to 13.1, but now I am planning a clean install, with the intention of making the new system even more stable and better documented. This time I really want to keep track of ALL the changes I inflict to the stock configuration files in /etc, anyone knows of good way to do that? I was thinking git, but may be it's overkill. I guess, I could simply make a list of files I changed...es,What I do is that I have /root/orig and /root/local. Orig contains a copy of every stock file Pat ships that I make a change to, and I keep my changed copy in /root/local and then copy it into place.
Code:
root@slack:~# tree /root/orig /root/local
/root/orig
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I am looking for a basic online expense tracking system that is:Web-based. Runs on LAMP, etc.Stable, reliable, etc.Open source.The end-user uses a web browser to enter the date of each expense, amount, vendor, etc.Print a periodic report and hand it over to the acccountant.
View 2 Replies View RelatedIs there a good way to set up internet tracking on an openSUSE 11.3 computer? I don't want users visiting porn sites or any other nonsense, and if they do, I want to know about it. Is there a good program that the administrator can set up to report this kind of thing or at least track it? Obviously, this would need to track all websites visited regardless of the application/browser used, and would need to be completely inaccessible to users. I don't want them having the ability to turn it off or circumvent it somehow.
View 8 Replies View RelatedIn the "software sources" windows under the "Updates" tab I have checked "Pre-released updates" and installed all the updates. I no longer want to track the proposed updates and have unchecked that item. Now am back to just security and recommended checked. How do i get it to downgrade the packages that it has modified when I had "Pre-released" checked? I want to get back on the stable "Recommended Updates". It seems to have changed what it looks at for updates but did not downgrade the packages.
View 1 Replies View RelatedI'm using Ubuntu 10.4 box with Apache2 web server. I have a site with several Domain Names. How do I set up tracking?
View 1 Replies View RelatedIs there a linux compatible program for tracking a stolen laptop? I tried Prey, but I can't get it installed and working. Something that works for the non-uber geek?
View 1 Replies View RelatedI am looking into setting up a system that can be used to track the progress and/or status of various projects being done by our I.T. staff. The specific features that I am looking for in the software are the following:
1. Project monitoring
2. Metrics
3. Email reminders
4. Bug tracking
5. Reporting
6. Scheduling
I have deployed applications like Bugzilla and RT Tracker in the past. However it has been several years since I have used either application so I am sure if either application can do some or all of the items that were listed above. Does anyone know if either of the two applications mentioned will do the items listed, or is there another application that is best suited for the job?
I have Ubuntu 10.04 with Gnome. Whenever I put in a blank CD/DVD an icon on the desktop appears named "Blank CD/DVD" and a window appears asking me what I want to do with it. How do I disable the window and the icon from the desktop?
View 2 Replies View RelatedHow can I keep a record of the memory usage of a particular software?The software I have in mind is firefox. All I want to do is to record the memory and cpu usage in regular intervals of time.htop (top) revels that firefox runs with many PIDs. So, is there a single command to keep track of the complete PIDs of firefox. If there exists a command to check the total usage at an instant I can write a script to run it periodically..
View 3 Replies View RelatedI work for a company with many employees and a lab that contains hundreds of servers. Currently we track the rack location, hostname, serial number, OS, etc of our servers in a local Excel spreadsheet. Updates when servers are removed / added / moved / reinstalled are unwieldy and not propagated, as you might imagine. What software exists to track assets in a centralized place that many people can update? I'd prefer web-based and free, and if possible open source.
View 5 Replies View RelatedI have just installed ubuntu 10 on a thinkpad t410. At first everything worked swimmingly, INCLUDING the wireless. After about five minutes, the wireless stopped working, in that it seemed to think it was still connected but pinging didn't work. I've now restarted several times, and each time I restart, the wireless works for about 1 minute, then stops working. If I try to disconnect and reconnect it will not reconnect (until I restart, that is).
iwconfig shows the correct ESSID and ifconfig shows an address, and "connection information" shows a varying percentage of connection.
I am trying to setup multipath with failover policy on openSuSE 11. I have two qla2xxx HBA's installed and they appear to be working. Here is the output of "multipath -l" command
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While testing, I pulled one of the two connection to SAN, and the connection failed over to second HBA connection to SAN. When I plug the cable back in, it does not fall back to original connection... It stays in failed state. Also, I noticed that failed disk (sdd disk) comes back as (sdg disk), which is probably why connection does not fall back to original HBA. But, when I run "/sbin/service multipathd restart" sdg disk shows as as enabled in multipath -l...
I tried to finally set-up surround sound on my Ubuntu 10.04 machine and i was successful in doing so after a while of changing settings and tinkering. After doing so though, i was later in the day not able to get into the Pulseaudio Volume Control, therefore, everything is stuck where it is and i can't change anything. When i try to open Pulseaudio Volume Control i get the error message, Connection failed, Connection refused. My programs still play sound and i can control the sound of the programs through the programs, but i cant control the sound of the sorround sound now and my main sound bar only affects my stereo speakers, not the surround ones.
I believe this may have happened after the random disk check on restart, but i can't 100% confirm that and i'm not even sure if they are related. I still have sound, but i have no way to control the volume of my entire system at once. I did some looking around online and saw that others are having or had the same issue, and it was through different versions of Linux also. somehow reset everything so i can access PAVC and start over . I also tried steps listed in another thread here on the same topic, but they weren't working and it also seemed to be for older Ubuntu versions.
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