similar to: syncookies.c

Hello Everyone, I have 2 different suggestions about syn-cookies method which is used to block syn-flood attacks. Syn cookies bitwise image --------------------------------------------- T(5 bits) ---MSS(3 bits)-----H(24 bits) --------------------------------------------- So, 1- T value can be decreased to 2 bit which is already 5 bit.And hash value will be 27 bit. 2-Normally syn-cookies is

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ______________________________________________________________________________ Caldera International, Inc. Security Advisory Subject: Linux - syncookies firewall breaking problem Advisory number: CSSA-2001-038.0 Issue date: 2001, November 05 Cross reference: ______________________________________________________________________________ 1.

Hi, folks @ freebsd-security. First, I am not sure if this is apropriate topic for that list, so sorry, if it is not. Some time ago I have read rfc1948 (protection from blind TCP spoofing) and became interested in the way how it is implemented in FreeBSD. After some googling (BTW if you like Google you might be interested in this: http://register.spectator.ru/img/bart.gif ), I found this:

I have a question about tcp layer of linux kernel. I want, Syn and ack packages received to server will be counted. [image: enter image description here] where total_syn_count and total_ack_count are variables to be defined and will be increased Which files to be used ???? tcp_input.c ,tcp_output.c , tcp_ipv4.c

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

--------------------------------------------------------------------- Red Hat, Inc. Red Hat Security Advisory Synopsis: kernel 2.2 and 2.4: syncookie vulnerability Advisory ID: RHSA-2001:142-15 Issue date: 2001-10-26 Updated on: 2001-11-02 Product: Red Hat Linux Keywords: syncookie security kernel Cross references: Obsoletes:

-----BEGIN PGP SIGNED MESSAGE----- ============================================================================= FreeBSD-SA-02:20 Security Advisory FreeBSD, Inc. Topic: syncache/syncookies denial of service Category: core Module: net Announced: 2002-04-16

I have just finished a patch to linux 2.0.29 that provides the SYN cookies protection against SYN flood attacks. You can grab it from my home page at: http://www.dna.lth.se/~erics/software/tcp-syncookies-patch-1.gz You can also follow the pointers from my home page (see the signature) to get a very short blurb about this patch. Quick synopsys: This implements the SYN cookie defense against SYN

Hi, I have some models in a file named genel. When I try to use one of the classes in my controller rails raises an error telling classname.rb is not forund even the file is required already. require "genel" require "hesaplar" class HesaplarController < ApplicationController def yeni_firma @emlak_firmasi = EmlakFirmasi.new @sehirler = Sehir.find_all end

Hi, I got this error when i tried to type for some of those. "sysctl: unknown oid...." any idea.. my server seems to be very lagged, where else the network connection seems fine, i think BSD itself as my other redhat box is fine. What else can i do to get optimum protection. Thanks. ----- Original Message ----- From: "Per Engelbrecht" <per@xterm.dk> To:

Hello Stephen, I may have tracked down some unexpected behaviour from a common bridge setup, and would like to incite expert oppinion on my observations. The issue relates to both 2.6 and 2.4 kernel series bridging code, and as far as I can see might have been present in all releases hitherto. Consider this setup: - two ethernet devices in a simple bridge configuration - bridge-interface

Hello, I would like to use push in qmail+dovecot environments. Can someone tell me which components should I use to enable this feature for mobile devices? Thanks. -Ibrahim.

So finally I got the net vampire to work. I had to roll back to commit 62e0a74 bypassing all the updates done by mdw at samba.org for now. Now the replication PDC1 is the first domain controller created by provision PDC2 is the second is the second domain controller created by net vampire on PDC1 I added user using "net newuser testuser1" in few seconds it appeared on PDC2 using the

Greetings, all: OS: CentOS 6.4 x86_64 Kernel: 2.6.32-358.14.1 I could use some assistance with setting up pulse to load balance my dns servers. I've configured tcp and udp port 53 with the piranha gui, set up arptable rules on the real servers and added the virtual ip to the bond0 interface on the real servers, but I'm still having no luck in getting things going. A dig against the

I'm trying to get MSSQL Query analyzer to work it loads up i can enter the sql server name and user name and password. in the sql client utility it is setup for tcpip with an alias for the server name and the ip address. it tries to connect then comes back with an error: [Microsoft][ODBC SQL SERVER DRIVER][TCP?IP SOCKET]General network error odbc32 is native wsock32 is native winsock is

Hello Experts, I have a tree of categories in this category object there is a property called type. the root categories have no type but the children have. so how I can get all the roots with filled in children that have category type = ''B'' for instance. I tried to run Category.roots then delete children With a category not equal to ''B'' but this causes a major

Hi all, May i know does R has packages or code to run "Bayesian Relative Survival Analysis"? I have look through Bayesian Survival Analysis(2001) by Joseph George Ibrahim<http://www.google.com/search?tbo=p&tbm=bks&q=inauthor:%22Joseph+George+Ibrahim%22>, Ming-Hui Chen<http://www.google.com/search?tbo=p&tbm=bks&q=inauthor:%22Ming-Hui+Chen%22>, Debajyoti

Hi all. I created a smb-share on my el6 for all windows-pcs in my home-network (I'm the only Linux-User in my family) for sharing all the stuff we have, like music and videos and documents. The share will be shown on the other pcs (Windows XP), but they can't open it. The error-message ist "Share not found" on our preferred language of course! SELINUX-CONFIG sh-4.1# cat

Hi, I want to add a feature to the fetch command in IMAP, by enabling it to return the save date, when I request the SAVEDATE parameter. I want to use this for my webmail application, so I can show the users the deleted date when they are viewing the Trash folder. I was able to put it directly into the code (patch attached), but I was wondering if there is a way to put it as a plugin instead.

Hello, I am looking for a code in R for the variance ratio test statistic (the Lo and Mackinlay version or any other versions). Does anybody have such a code they can share or know a library in which I can find this function? Basically I have a number of time series which I need to check for persistence. One other test I can use is the runs test in the tseries package. Any help will be greatly