Josh Enders joshenders

"A little bit of slope makes up for a lot of y-intercept"

01/13/2012. From a lecture by Professor John Ousterhout at Stanford, class CS140

Here's today's thought for the weekend. A little bit of slope makes up for a lot of Y-intercept.

[Laughter]

Successful mitmproxy-3.7 setup tested on OS X 10.13.6 and iPhone X running 12.1.4

Enable IP forwarding and disable ICMP redirects to keep the iPad sending traffic to the proxy

sudo sysctl -w net.inet.ip.forwarding=1
sudo sysctl -w net.inet.ip.redirect=0

net.inet.ip.forwarding
Enable IP forwarding between interfaces

`ld` – Wading through Mac OS X linker hell

Intro

Friend: I tried looking at static linking in Mac OS X and it seems nearly impossible. Take a look at this http://stackoverflow.com/a/3801032

Me: I have no idea what that -static flag does, but I'm pretty sure that's not how you link to a library. Let me RTFM a bit.

Minutes later...

Making a UEFI bootable iPXE USB drive

Build the UEFI executable for iPXE

# First we'll clone iPXE
$ git clone git://git.ipxe.org/ipxe.git
# Go into the src directory of the cloned git repo
$ cd ipxe/src
# Compile the UEFI iPXE executable

Lets take a look at the vulnerable code:

if (s->servername_done == 0) {
    switch (servname_type) {
        case TLSEXT_NAMETYPE_host_name:
            if (s->session->tlsext_hostname == NULL) {
                if (len > TLSEXT_MAXLEN_host_name ||
                    ((s->session->tlsext_hostname = OPENSSL_malloc(len + 1)) == NULL)) {
 *al = TLS1_AD_UNRECOGNIZED_NAME;

Ubuntu 16 – how to increase maximum file open limit ( ulimit -n )

If you are setting up nginx,chances are you will discover your worker_connections is at some low number, such as 1024. You can’t increase this number unless you increase kernel limit as well. First of all run cat /proc/sys/fs/file-max to discover your maximum limit.

abc@ubuntu:~$ cat /proc/sys/fs/file-max
1048576
abc@ubuntu:~$ ulimit -n
1024

Importing Hand-Rolled C Header Files in LLDB

Scenario

We're debugging a dylib, libhello.dylib
The dylib is linked from hello
The exported function is helloworld()
We do not have source, but have reversed a struct from the library and created a hand-crafted header file

Header File

Proxmox - SPICE client setup for MacOS

Install a working (and compiled) version of virt-viewer. You may view the homebrew package's upstream source on GitHub.
```
brew tap jeffreywildman/homebrew-virt-manager
brew install virt-viewer
```
Once that's installed should be able make a call remote-viewer with a pve-spice.vv file downloaded from proxmox web interface

	#!/bin/bash

	# install CUDA Toolkit v8.0
	# instructions from https://developer.nvidia.com/cuda-downloads (linux -> x86_64 -> Ubuntu -> 16.04 -> deb (network))
	CUDA_REPO_PKG="cuda-repo-ubuntu1604_8.0.61-1_amd64.deb"
	wget http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64/${CUDA_REPO_PKG}
	sudo dpkg -i ${CUDA_REPO_PKG}
	sudo apt-get update
	sudo apt-get -y install cuda

	#!/bin/bash -x
	#Date: 21/7/2017
	#Author: Mohan
	#Purpose: To upload files to AWS S3 via Curl
	#Uploads file at the top level folder by default


	#S3 parameters
	S3KEY="XXXXXXXXXXX"
	S3SECRET="XXXXXXXXXXXXXXXX"