regedit is the command to invoke registry editor. it can be used for windows TCP tuning. The Windows Registry is a hierarchical database that stores configuration settings and options on Microsoft Windows operating systems. It contains settings for low-level operating system components as well as the applications running on the platform: the kernel, device drivers, …
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tcp tuning tcp_reordering
[:–:]cat /proc/sys/net/ipv4/tcp_reordering 3 [:–:] The tcp_reordering variable tells the kernel how much a TCP packet may be reordered in a stream without assuming that the packet was lost somewhere on the way. If the packet is assumed lost, the TCP stack will automatically go back into a slow start since it believes packets may have …
frame definitions
frame —| 1. a border or case for enclosing a picture, mirror, etc. 2. A {data link layer} “packet” which contains the header and trailer information required by the physical medium
tcp tuning tcp_abc
echo 1 > /proc/sys/net/ipv4/tcp_abc From RFC 3465. A Modified Algorithm for Increasing the Congestion Window As originally outlined in [Jac88] and specified in [RFC2581], TCP uses two algorithms for increasing the congestion window. During steady-state, TCP uses the Congestion Avoidance algorithm to linearly increase the value of cwnd. At the beginning of a transfer, after …
Basic relativity principles
Certain principles of relativity have been widely assumed in most scientific disciplines. One of the most widespread is the belief that any law of nature should be the same at all times; and scientific investigations generally assume that laws of nature are the same regardless of the person measuring them. These sorts of principles have …
mechanics :|
Mechanics is the branch of physics concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effect of the bodies on their environment.
mechanics :|
Mechanics is the branch of physics concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effect of the bodies on their environment.
FAI. Fully Automatic Installation.
FAI Installation Steps Network boot via PXE Run scripts to determine FAI classes and variables Partition local hard disks and create RAID, LVM configuration and the file systems Install and configure software packages Customize OS and software to your local needs Reboot freshly installed machine http://www.informatik.uni-koeln.de/fai/features/
tcp tuning tcp_syncookies
tcp_syncookies. Send out syncookies when the syn backlog queue of a socket overflows. This is to prevent against the common “syn flood attack”. Disabled (0) by default. :–:cat /proc/sys/net/ipv4/tcp_syncookies 0 :–: added from linux kernel source. /* 160 * Generate a syncookie. mssp points to the mss, which is returned 161 * rounded down to …
generating random passwords.
makepass.py from random import choice import string def GenPasswd(length=8, chars=string.letters+string.digits): return ”.join([ choice(chars) for i in range(length) ]) ahiliation:~$python Python 2.5.5 (r255:77872, Mar 20 2010, 05:19:32) [GCC 4.4.3] on linux2 Type “help”, “copyright”, “credits” or “license” for more information. >>> import makepass >>> for i in range(6): … print makepass.GenPasswd(12) … BSxqLK9mpq4R FRlppP7K2Che YBkz0QZMJojC JjTQlcHzDsC3 …