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A minimal TCP Client in C | OpsTips
Go through the steps and syscalls involved in creating a TCP client using C.
c  tcp  client 
september 2018 by ianweatherhogg
Configuring HAProxy with HTTP2 support | OpsTips
HTTP2 support recently landed in HAProxy 1.8. Check out how to configure HTTP/2 support for HAProxy.
haproxy  http  two  ssl  certificate  generator  dns  host  wire  shark  tcp  dump  debug 
september 2018 by ianweatherhogg
Nginx HTTP2 Server Push | OpsTips
NGINX just added server push to mainline. Checkout a NGINX HTTP2 server push example using the latest code from source integrating with an HTTP1 Golang web server.
nginx  http  two  chrome  ssl  debug  wire  shark  pcap  5*  tcp  dump 
september 2018 by ianweatherhogg
The Interweb Isn't Magic
It’s quite easy to get scared by large systems of things that seem like magic. The Internet is pretty remarkable. It’s probably among the largest and most co...
ruby  socket  tcp  lowlevel  5* 
june 2018 by ianweatherhogg
Tcpdump Examples - 22 Tactical Commands | HackerTarget.com
In these tcpdump examples you will find 22 tactical commands to zero in on the key packets. Know your network with this powerful packet capture tool. Examples for http, icmp, dns, snmp and more.
tcp  dump  4* 
may 2018 by ianweatherhogg
Introduction to modern network load balancing and proxying
It was brought to my attention recently that there is a dearth of introductory educational material available about modern network load balancing and proxying. I thought to myself: How can this be…
load  balance  proxy  tcp  network  topology  5*  lowlevel 
january 2018 by ianweatherhogg
Packet radio lives on through open source software | Opensource.com
Linux packet stations can be used for mail, chat, and even sending messages long distances via the International Space Station.
radio  linux  tcp  packer  network 
september 2017 by ianweatherhogg
Basic home gateway services: DHCP, DNS, NAT
Publicly routable IPv4 addresses, which are scarce, are not generally assigned to every host in a home network.
network  topology  dhcp  dns  ip  protocol  5*  tcp  dump 
august 2017 by ianweatherhogg
Let's code a TCP/IP stack, 4: TCP Data Flow & Socket API
In this post, we will look into TCP data communication and how it is managed. Additionally, we will provide an interface from the networking stack that appli...
tcp  ip  stack  network  protocol  arp  lowlevel  5*  dump  strace  curl  test 
july 2017 by ianweatherhogg
Let's code a TCP/IP stack, 3: TCP Basics & Handshake
Now that our userspace TCP/IP stack has minimal implementations for Ethernet and IPv4, it is time to look into the dreaded Transmission Control Protocol (TCP...
tcp  ip  stack  network  protocol  arp  lowlevel  5* 
july 2017 by ianweatherhogg
Let's code a TCP/IP stack, 2: IPv4 & ICMPv4
This time in our tutorial userspace TCP/IP stack we will implement a minimum viable IP layer and test it with ICMP echo requests. We will take a look at the ...
tcp  ip  stack  network  protocol  arp  lowlevel  5* 
july 2017 by ianweatherhogg
Let's code a TCP/IP stack, 1: Ethernet & ARP
Writing your own TCP/IP stack may seem like a daunting task. Indeed, TCP has accumulated many specifications over its lifetime of more than thirty years. The...
tcp  ip  stack  network  protocol  arp  lowlevel  5* 
july 2017 by ianweatherhogg
Let's code a TCP/IP stack, 5: TCP Retransmission
At this point we have a TCP/IP stack that is able to communicate to other hosts in the Internet. The implementation so far has been fairly straight-forward, ...
tcp  stack  curl  network  protocol  lowlevel  4*  ip  table  dump  tap 
july 2017 by ianweatherhogg
Protocol Specification · real-logic/Aeron Wiki
Aeron - Efficient reliable UDP unicast, UDP multicast, and IPC message transport
cpp  java  network  protocol  lowlevel  specification  udp  tcp  5* 
november 2016 by ianweatherhogg
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