uncleflo
Registered since September 28th, 2017
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NFS - which ports to open? - Storage - Discussions
Saved by uncleflo on December 23rd, 2018.
No problem connecting to NFS with firewalls disabled,but even with TCPView it's not obvious which ports require opening.
We've opened port 2049 for both UDP and TCP and all seems well, but there's a selection of ports mentioned across the web for NFS. So with XenServer just 2049? Sharing filesystems by NFS: Regardless of which choice is made for ID mapping you will need to adjust any firewall the system is using so that NFS clients can communicate with the server. You will need to ensure that the following ports are open before sharing any filesystem: UDP: 111, 1039, 1047, 1048 and 2049. TCP: 111, 1039, 1047, 1048 and 2049. See _this article_ Tobias
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Hping
Saved by uncleflo on October 23rd, 2018.
hping is a command-line oriented TCP/IP packet assembler/analyzer. The interface is inspired to the ping(8) unix command, but hping isn't only able to send ICMP echo requests. It supports TCP, UDP, ICMP and RAW-IP protocols, has a traceroute mode, the ability to send files between a covered channel, and many other features. While hping was mainly used as a security tool in the past, it can be used in many ways by people that don't care about security to test networks and hosts.
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iPerf - The ultimate speed test tool for TCP, UDP and SCTP
Saved by uncleflo on October 23rd, 2018.
iPerf3 is a tool for active measurements of the maximum achievable bandwidth on IP networks. It supports tuning of various parameters related to timing, buffers and protocols (TCP, UDP, SCTP with IPv4 and IPv6). For each test it reports the bandwidth, loss, and other parameters. This is a new implementation that shares no code with the original iPerf and also is not backwards compatible. iPerf was orginally developed by NLANR/DAST. iPerf3 is principally developed by ESnet / Lawrence Berkeley National Laboratory. It is released under a three-clause BSD license.
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HAProxy
Saved by uncleflo on December 27th, 2017.
HAProxy is a free, very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications. It is particularly suited for very high traffic web sites and powers quite a number of the world's most visited ones. Over the years it has become the de-facto standard opensource load balancer, is now shipped with most mainstream Linux distributions, and is often deployed by default in cloud platforms. Since it does not advertise itself, we only know it's used when the admins report it :-) Its mode of operation makes its integration into existing architectures very easy and riskless, while still offering the possibility not to expose fragile web servers to the net. Each version brought its set of features on top of the previous one. Upwards compatibility is a very important aspect of HAProxy, and even version 1.5 is able to run with configurations made for version 1.0 13 years before. Version 1.6 dropped a few long-deprecated keywords and suggests alternatives. The most differenciating features of each version are listed below :
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How To Use Netcat to Establish and Test TCP and UDP Connections on a VPS
Saved by uncleflo on June 27th, 2017.
Linux is known for having a great number of mature, useful command line utilities available out of the box in most distributions. Skilled system administrators can do much of their work using the built-in tools without having to install additional software. In this guide, we will discuss how to use the netcat utility. Often referred to as a Swiss army knife of networking tools, this versatile command can assist you in monitoring, testing, and sending data across network connections. We will be exploring this on an Ubuntu 12.04 VPS, but netcat should be available on almost any modern Linux distribution. Ubuntu ships with the BSD variant of netcat, and this is what we will be using in this guide. Other versions may operate differently or provide other options.
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Netcat – a couple of useful examples
Saved by uncleflo on June 27th, 2017.
One of the Linux command line tools I had initially under-estimated is netcat or just nc. By default, netcat creates a TCP socket either in listening mode (server socket) or a socket that is used in order to connect to a server (client mode). Actually, netcat does not care whether the socket is meant to be a server or a client. All it does is to take the data from stdin and transfer it to the other end across the network. The simplest example of its usage is to create a server-client chat system. Although this is a very primitive way to chat, it shows how netcat works. In the following examples it is assumed that the machine that creates the listening socket (server) has the 192.168.0.1 IP address. So, create the chat server on this machine and set it to listen to 3333 TCP port
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How Can I Tell What is Listening on a TCP/IP Port in Windows?
Saved by uncleflo on January 27th, 2017.
Whenever an application wants to make itself accessible over the network, it claims a TCP/IP port, which means that port can’t be used by anything else. So if you need to use an in-use port, how do you tell what application is holding it? There’s a number of ways to tell what application has the port locked, but we’ll walk through the built-in way using the command line and Task Manager, and then a great freeware application that does it all in one utility.
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uncleflo.com - DNS Whois IP
Saved by uncleflo on April 2nd, 2015.
Domain uncleflo.com is not listed in the top million list of Alexa. uncleflo.com is not listed in the top million list of Quantcast. It is not listed in the DMOZ directory. This domain has no WOT reputation. This domain is hosted by NatCoWeb Corp. (AS46636). The first DNS server is ns1.6sync.net. The current IPv4 address is 204.62.14.86.
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Tor Project: Anonymity Online
Saved by uncleflo on September 5th, 2013.
Tor is free software and an open network that helps you defend against a form of network surveillance that threatens personal freedom and privacy, confidential business activities and relationships, and state security known as traffic analysis. Why Anonymity Matters: Tor protects you by bouncing your communications around a distributed network of relays run by volunteers all around the world: it prevents somebody watching your Internet connection from learning what sites you visit, and it prevents the sites you visit from learning your physical location. Tor works with many of your existing applications, including web browsers, instant messaging clients, remote login, and other applications based on the TCP protocol.
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Topic: Open Firewall Ports
Saved by uncleflo on May 20th, 2013.
You will need to open port 3306 TCP in the Windows firewall or any third party firewall for all software so it can communicate with MySQL. The server should have port 3306 TCP open both inbound and outbound (if using Windows 7 or higher)
On the server you should open port 3306 TCP .......on the workstations you should allow the applications through the firewall.
Since Windows has different versions and ways to open the firewall we have included some of the most popular methods.
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Live WebM Streaming with Flumotion
Saved by uncleflo on May 17th, 2013.
All this is done with Free Software. Flumotion streaming software is a free software streaming solution that provides an end-to-end solution from capture to encoding to streaming. The developers mailing list is here: flumotion-devel@lists.fluendo.com Flumotion is a company that develops the free software Flumotion streaming software as well as providing commercial services based on the streaming server. WebM is the new free-to-use royalty free video format for the web. Why should video not be free and royalty free when the underpinnings of the web are free and royalty-free: HTML, Javascript, CSS, PNG, HTTP, TCP/IP? Now we have a viable alternative for H264 that competes in quality and is being supported not just by software but by hardware companies too. Welcome to the future of Web Video.
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