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?
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?
I 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.
Can the SFQ queue be used to divide bandwidth not only per connections but also per computer? E.g. if two computers download something each computer gets half of the bandwidth. I'm trying to do my own script based on wondershaper and would want to divide the bandwidth between all devices so that one device can't saturate the uplink.
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.
recently i rent a xen vps intended to setup a PPTPD vpn server for me and my friends. so we can by-pass the great firewall in china and get back on ....., facebook and stuff. i have already setup the server and i can connect to it without any problem. but i still want to do some further configuration the server:
1. i want to limit the bandwidth to 400k/s per connection. 2. i also want to limit the max connection per user a/c
i have some thoughts on the 2nd requirement. in the user configuration file of /etc/ppp/chap-secret, you can specify the range of ip the user can get, does it limit the max connection per user a/c? or they can connect anyway, just every now and then a box pop up says conflict in IP address?
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 created a the class like this for shaping the packets with a specified bandwidth rate.....
tc qdisc del dev eth0 root tc qdisc add dev eth0 root handle 1: htb default 15 tc class add dev eth0 parent 1:0 classid 1:1 htb rate 750kbit ceil 750kbit tc class add dev eth0 parent 1:1 classid 1:3 htb rate 600kbit ceil 750kbit prio 0
For Our Requirement:-
I dont want to specify the bandwidth rate strictly like this rate750kbit ceil 750kbit,based on whatever speed is coming which should allocate the bandwidth rate for particular class...I need one application for finding the upcoming bandwidth & Is any other method is there for specify the bandwidth rate in a classes.
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?
i am writing a netfilter module for linux 2.6.34.6-47 / 2.6.35. while i could capture the packets on the incoming hook since the same came as a single packet in probably the allocated skbuff area by the stack, i found that packets going out of the machine are getting splitted into linear and non-linear area. skb->data gives the total length of packet as correct, but when i extract skb-> data to print it, it prints only ip and tcp header. Now to treat the data i need to extract it and then push it back on the route.
To clarify if my data is 3 bytes . the total length by passing pointers show as 55 bytes = ( 52 byte of header + 3 byte of data), but i can't access these 3 bytes by using skb->tail - skb->data. how to extract outgoing data for any further action and then put it back on route for further encapsulation by the L2 stack or whatever. will skb_linearize() or skb_linearize_cow() be of any use , if yes how and why?
Recently I am logging the packets that are supposedly INVALID and I found out that I am dropping a lot of packets that seem legitimate (in the sense that they are clients that are allowed to contact us).
Code: :invalid - [0:0] -A invalid -j LOG --log-prefix "[DROP INVALID] : " --log-tcp-options --log-ip-options -A invalid -j DROP -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT -A INPUT -i lo -j ACCEPT
[Code]...
I would like to know If I can tell a complaining client that his dual-WAN solution is not behaving properly.Should such a dual WAN-router spoof its IP to the one that initiated the connection? And what happens if these packets are not dropped? Will they be accepted by the application or does it depend on the application? It sounds like a security risk if it does. It seems to me those packets will be ignored anyway by the application Netfilter's manual says that it's safe to drop these packets.
We have a sipmle office network set up that we also use use to connect to the internet, however of late the number of users has increased thus slowing internet access. Bandwidth upgrade is not an option thus i have to do bandwidth shaping on our linux router. The question is how do set the squid configs to allow certain IP's range a certain percentage bandwidtheg 60% and furthe divide the rest. Alternatively how can allow certain IPs to have higher bandwidth access.
In my household a number of people use the internet. Up to a maximum of 3 wired connections and 2 wireless connections at its peak, all connection through my D-LINK G604T router. The problem is, when one person is downloading or watching ..... or whatever, the others using the internet suffer. I've spent hours configuring QoS on my router, and long story short, no matter how I configure it, it just simply does not work. QoS in no way shape or form limits connection speed (which it says it should). Anyway.
I have a spare computer under my desk, and I'd like to know if I could set this up with a (free) linux distro that limits bandwidth speed per connection. For example, of the 1500 kb/ps (about) my modem pulls, is there a way to limit that to 768 or 512 per connection? so person A can still download, person B can still watch ....., and person C can still play counterstrike with a latency under 100. This would solve many, many arguments in my house I am *fairly* good with computers, but if the distro came with documentation and a GUI that would be awesome.
* TL;DR: * Is there a linux distro I can load on a spare computer that limits bandwidth per connection, wireless or otherwise, with good documentation? Failing that is there firmware I can use for my modem (dlink g604t) that would do the same? Failing that do you know of any good hitmen that would solve my family arguments, ahem, permanently?
I posted this in the Networking section, but should probably be over here. Couldn't move it. I have a transparent proxy in place. I have Webmin installed on the server. Is there an app that can monitor bandwidth in real time? Also run reports? I have SARG installed, but seems to only monitor HTTP traffic, I need to monitor all traffic. I have a bridged connection, but monitoring the outside interface is fine too.
I have created a nfq handler via nfq_open() and using the returned qhandle to bind my application program to a specific queue number that is configured in iptables. when i invoke nfq_create_queue() my program is stuck there and the back trace shows it is blocked in recvfrom()
bt
in recvfrom () from /lib/x86_64-linux-gnu/libpthread.so.0 in nfnl_recv () from /usr/lib/libnfnetlink.so.0 in nfnl_catch () from /usr/lib/libnfnetlink.so.0
I am renting a VPS from[URL].They do not supply a webhosting panel for restarting/shutting down or for seeing monthly bandwidth consumtion. I am running CentOS 5.3. I was wondering if theres any programs that you can install to view monthly/daily bandwidth consumption on our server?
I would like to allow multi users to access P2P networks, so I wonder if there's a way to tracking these kind of protocols with netfilter, and also compatibility with nat, like the module conntrack_ftp seems to do with the FTP protocol.
I've looked all over the web, but don't see an answer to my particular case. I'm in GParted in Ubuntu Live CD 9.10 amdx64 To prep for Ubuntu install, I'm attempting to resize and re-partition my second hard drive which was FORMERLY my primary boot drive for Vista before it crashed a few days back. It is CURRENTLY my Vista User data file and is about 250Gb in size. The drive is a SATA 500Gb total.
But GParted now all of a sudden gives me several "Cluster accounting failed at blah blah: missing cluster in $Bitmap" error messages. Is there a good way to 'fix' these errors? (besides reformatting it) I deleted the long-winded background, so let me know if you need more info. Short version: I installed vista by reformatting my 120Gb data drive as the primary master now. Then I plugged in my 'previous' 500Gb Sata drive, and pointed Window's User folder to my old User folder, and voila, was back up and running in Vista... minus all my programs. but now, both drives are recognized by GParted as "boot" drives.
Im looking for a program to monitor the ammount of bandwidth usage per network. Ex: I have lots of networks connected to one server, and i would like to know for example how much is the average bandwitdh usage for network 172.16.2.0/24 and 172.16.5.0/24 for one hour, for example.
I'm doing some simulations (using Iperf) to obtain throughputs values of a link between two gigabit ethernet cards for different delays and different drop probability (using netem) .... Now I have to do a 3minute long simulation in which during the firstnute the bandwidth is 1000Mbit/s, 500Mbit/s during the second minute and 1000Mbit/s during ththird one....Does anybody know how can i do this type simulation
I am trying to limit bandwidth of certain ip addresses on my server. I have been doing hours of reading and not getting very far...
So far I believe the iptables command is:
And now I just need the tc command to read those marks and limit bandwidth, I have a gigabit connection and would like to limit each of these ip addresses to 10mbit in and out.
Calculating the available bandwidth methods IGI/PTR,PATHLOAD,SLOPS,PACKET PAIR...
I gone through above methodogies ,when i finish one methods(IGI/PTR) i came to know,one application should run in client side and another application should run in server side (i.e,) Internet Service Provider side,
In IGI/PTR method ./ptr-client.c & ./ptr-server.c is there .,if we want available bandwidth,I Should run ./ptr-client.c (in myside)correspondingly ./ptr-server.c then only we wil get a availble bandwidth...
My need is without run any application on the server side ./ptr-server.c like that,but I should develop the application only on client side (in my routerside based on linux)..
1:whether it is possible to get the available bandwidth run application in client side only?.if possible. how i implement the code in client side( only )for getting the available bandwidth ...whether any source code is available?...
I am Network Administrator in a Degree College managing around 2500 Comps. My ISP has terminated its Internet link (15 Mbps) to our Linux Server (Installed 2 NIC) from where Internet connection is extended to rest of the machines in network. I am supposed to send different bandwidth to different departments say 5 Mbps to Hostel, 2 Mbps to Staff room etc. I am new to linux and don't know anything about Bandwidth Management in linux.
I am connected with LAN. We have many computers with different OS viz.linux, windows etc. Now I want to know the bandwidth every computer is getting and using. Is there any Ubuntu packages to monitor this?
I am using SQUID 2.6 on cent os. Squid as a proxy server is working fine. I want to manage my bandwidth according to my office staff.Like for top management users may allocate 1 MB and rest of the users as 256 kb.Kindly guide me that how can I do it ?
I'm looking for some utility that will measure my network bandwidth use and report it in ways that are human readable. Specifically, I want something that I can use to stay ahead of my mobile broadband plan's usage metering.
dear can someone highly gui or text base/command line tool that use as "isp bandwidth monitoring tools in linux".i do have leased line,frame relay, wireless linke,dsl too. i want to monitor what is uploading and downloading.
I want to use the tc rules for bandwidth control in my lan.i have a linux router(traffic shaper).how i can limit the amount of bandwidth every user has access to per day? For example, any user can't download more than 2 gb per day(or per month).
The information about lan's users(such as a group type,userid,etc.but not any thing about time limiting per user)is in ldap directory on ldap server.the linux server uses ldap server for authentication users when the user login.
