search for: dummynet

I first met this problem when our (60 students) internetgateway refused to boot its new kernel, it was a 4.7-RELEASE. Then i loaded the old kernel and went home to check if my 4.8-STABLE does likewise. And the answer was yes! Both kernels were GENERIC + these options taken from the dummynet man pages: options DUMMYNET options NMBCLUSTERS options HZ When i boot the machine it suddently reboots when the kernel starts loading, i can just manage to see something about "panic: mbinit" before it reboots. Both systems are i386. I hope any of you can tell...

Hi everyone, I''m doing some networking experiments over high BDP topologies. Right now the configuration is quite simple -- two Xen boxes connected via a dummynet router. The dummynet router is set to limit bandwidth to 500Mbps and simulate an RTT of 80ms. I''m using the following sysctl values: net.ipv4.tcp_rmem = 4096 87380 4194304 net.ipv4.tcp_wmem = 4096 65536 4194304 net.core.rmem_max = 8388608 net.core.wmem_max = 8388608 net....

I first saw this problem when our internetgateway refused to boot its new kernel, it was a 4.7-RELEASE. Then i loaded the old kernel and went home to check if my 4.8-STABLE does likewise. And the answer was yes! Both kernels were GENERIC + these options taken from the dummynet man pages: options DUMMYNET options NMBCLUSTERS options HZ When i boot the machine it suddently reboots when the kernel starts loading, i can just manage to see something about "panic: mbinit" before it reboots. Both systems are i386. I hope any of you can tell...

...atd controls access to the lan. We have a 6.0 mb/s ADSL net connection for all the gaming clients to use, however if a gamer starts downloading a file, that file takes precendence and causes everyone's pings 'in-game' to sky rocket to unplayable levels. I have done some reading on DummyNet which is attached at the hip with IPFW, however I have been unsuccessful in getting it to work properly. I have done some research and found this site: http://info.iet.unipi.it/~luigi/ip_dummynet/ After reading I became more confused than before. Should I share the link as a whole to all 64 c...

...omodation with 2 roommates and a landlord and we share a cable internet connection. It is 2Mbit/400Kbit connection. Sometimes when one of us is downloading a song through Kazaa or a new Linux or FreeBSD iso, the bandwidth gets hogged and other users can't get through. I was trying to configure dummynet using Fair Queues but I seem to be missing something. I tried to modify some of the examples on Luigi Rizzo's web site (http://info.iet.unipi.it/~luigi/ip_dummynet/) but it doesn't seem to be working. It is a very simple setup. Private network (192.168.42.0/24)--------> FreeBSD 5.1 fi...

Greetings, Scenario: Centos box with eth1 (10.0.0.0/24) and eth0 (192.168.0.0/24) segment on eth0 has access to full bandwidth of uplink Both are on 100mbps switches Requirements: bandwith on segment on eth1 needs to be throttled to different speeds - say 32, 64, 128kbps and the such. Required for application performance testing purposes. As usual my girlfriend google is very verbose.

Howdy all, I posted this message to the netfilter mailing-list and didn''t get much response. I apologize if anyone here is getting this for a second time. Anyway, I recently migrated my firewall from a FreeBSD box running ipfilter, ipnat and dummynet to a Gentoo Linux box running netfilter and tc. I have to admit that I''m having problems visualizing tc in my head. So, I was wondering if I could get an assist. Basically, when I run my NNTP client, it uses as much bandwidth as it can get its grubby paws on. I have a 3M wireless conn...

...ch are new or which have seen extensive development brought in -- ng_nat and ng_car in particular. Bringing in the latest version of ng_nat would allow more flexible in-kernel NAT, while ng_car (which doesn't seem to be in 6-STABLE at all) would allow burstable traffic shaping -- something that DUMMYNET doesn't have. The latest version of mpd wouldn't be fully usable unless these and other Netgraph code that was developed for it are there.... --Brett Glass

root@vigilante /root cuaa1# man init |tail -n 130 |head -n 5 3 Network secure mode - same as highly secure mode, plus IP packet filter rules (see ipfw(8) and ipfirewall(4)) cannot be changed and dummynet(4) configuration cannot be adjusted. root@vigilante /root cuaa1# sysctl -a |grep secure kern.securelevel: 3 root@vigilante /root cuaa1# ipfw show 00100 0 0 allow ip from any to any via lo0 00200 0 0 deny ip from any to 127.0.0.0/8 00300 0 0 de...

Hi all, I am trying to solve a tiny problem that is trivial to solve using dummynet (FreeBSD). I just want to add a delay of 50ms to each outgoing packet from an interface. This is to simulate a large pool of multiple modem users so I also need to add b/w limits etc (which seems to be easy to do). From the mailing list I could fine 2 qdiscs that can simulate latency : "del...

...ort device rl device ed options IPFIREWALL #firewall options IPFIREWALL_VERBOSE #enable logging to syslogd(8) options IPFIREWALL_VERBOSE_LIMIT=0 #limit verbosity options IPDIVERT #divert sockets options DUMMYNET options IPFW2 [...] When the box starts it complains: Sep 15 15:54:21 test2 /kernel: acd0: CDROM <TOSHIBA CD-ROM XM-6002B> at ata1-master PIO3 Sep 15 15:54:21 test2 /kernel: Mounting root from ufs:/dev/ad0s1a Sep 15 15:54:21 test2 /kernel: module_register: module miibus/ukphy alrea...

I'm interested in crafting firewall rules that throttle connections that have lasted more than a certain amount of time. (Most such connections are P2P traffic, which should be given a lower priority than other connections and may constitute network abuse.) Alas, it doesn't appear that FreeBSD's IPFW can keep tabs on how long a connection has been established. Is there another firewall

I use shorewall quite a bit, and I would like to know if the following is possible with shorewall or even with existing modules with iptables, etc. We want to be able to add latency to packets (foremost), not rate limiting but actually adding in a specified amount of latency, etc. It looks like dummynet for ipfw on FreeBSD will someone to do this easily. Can I do this on Linux via shorewall? -- Kris -- "Early to bed and early to rise, and you''ll meet very few of our best people." -- George Ade

Hello, I'd like to change some network variables (bandwidth, delay, packet loss) to measure how speex behaves in certain conditions. Do you recommend any tools you may use in speex development? It seems NIST Net isn't maintained anymore. I've found dummynet, looks interesting, but any hints you guys may have would be most welcome... Thanks, -- Adriano

I want to build a "network simulator", to create scenarios such as delayed packets, lost packets, low bandwidth, or combinations of such. This document has been helpful for everything except the bandwidth: http://linux-net.osdl.org/index.php/Netem There is some documentation here regarding bandwidth: http://luxik.cdi.cz/~devik/qos/htb/ What''s the best documentation to read

...ollowing: ------------------------------------- options IPFIREWALL options IPFIREWALL_VERBOSE options IPFIREWALL_FORWARD options IPFIREWALL_VERBOSE_LIMIT=100 options IPFIREWALL_DEFAULT_TO_ACCEPT options IPDIVERT options HZ=1000 options DUMMYNET Dmesg follows: -------------------------------------- bwm# dmesg Copyright (c) 1992-2003 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD 4.8-20030731-STABLE #0: Sun Aug...

Hi all Iam planning to deploy Multiple Links using RH 9.0/ PIII 500Mhz/512MB RAM With all Patches related to Route and rest Mentioned in nano.txt Iam Running BGP 4 with all the ISP, but iam not doing Load balancing the Links Each Link have specific application and specific users. Eth0 is connected to Local Net eth1- ISP1 eth2- ISP2 eth3- ISP3 Now i want to make Specific Routes x.x.x.x

I've been trying to do traffic shaping on one of my public servers and after reading up, it seems like the way to do so is via tc/htb. However, most of the documentation seems at least half a decade old with nothing new recently. Furthermore, trying to get documentation on tc filters turned up a blank. man tc refers to a tc-filters (8) but trying to man that gives a no such page/section

Hello, I current have a FreeBSD 4.8 bridge firewall that sits between 7 servers and the internet. The servers are being attacked with syn floods and go down multiple times a day. The 7 servers belong to a client, who runs redhat. I am trying to find a way to do some kind of syn flood protection inside the firewall. Any suggestions would be greatly appreciated. -- Ryan James ryan@mac2.net

...packets are inserted into the input pipes ... but not into the outgoing pipes .... why ? i am missing somethin' .... what ? kernel compiled with these additional options .... options IPFIREWALL options IPFIREWALL_VERBOSE options IPFIREWALL_VERBOSE_LIMIT=10 options IPFIREWALL_FORWARD options DUMMYNET options HZ=1000 options IPDIVERT enlightment please .... thanks ... bye bye