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Modification of OSPF overhead value, protocol priority and timer 1: Principle overview:         Because a variety of dynamic routing protocols may run on the router at the same time, there is a problem of routing information sharing and selection among various routing protocols. The system sets different default priori ...

Basic concepts Currently Ceph officially provides three ways to deploy Ceph clusters, ceph-deploy, cephadm, and manual installation ceph-deploy A cluster automation deployment tool, long-lasting, mature and stable, integrated by many automation tools for production deployment cephadm from Octopus Be ...

This is the fourth in a series, so let's continue to talk about how to deploy a simplified private cloud environment in your notebook to meet low-cost, low-power, low-latency experimental environments. In the first three articles, we talked about basic virtualization-related Pre-preparation And prepared to avoid blind touch during construction ...

1. Channel 1.1 what is Channel Channel is similar to Stream. It is a two-way channel for reading and writing data.You can read data from the channel into the buffer or write data from the buffer into the channel. (channel only deals with buffer)The previous stream is either input or output, and channel is lower than stream. 1.2 common channel ...

0x00 Preface From the perspective of penetration, this paper summarizes several commonly used personal intranet penetration and Intranet proxy tools, and introduces their simple principles and use methods. 0x01 nps-npc 1.1 Introduction nps is a lightweight, high performance and powerful intranet penetration proxy server. At present, it s ...

On Openstack network This version is Stein version and adopts OVS network Test environment: 1 control node, 2 computing nodes 1, Network structure diagram Borrow 2 online pictures Figure 1 👇: Figure 2 👇: 2, OVS analysis As shown in Figure 2 vm1 represents an instance QBR XXX stands for Linux virtual bridge You can view it through ...

Create a new PHP file: a.php <?php $a = "a.txt"; include("php://filter/resource=" . $a); Create a new file in the same directory: a.txt (the content is <? PHP phpinfo();? > base64 encoding) PD9waHAgcGhwaW5mbygpOz8+ Next breakpoint in the related function of the corresponding file: [data] Post key codes: php_stream * php_strea ...

Introduction *: tcp is a protocol of network communication. For programmers, the protocol is to write a program according to the agreed protocol. For specific coding, compared with the previous demo of socket communication, socket communication will not use a new API, but add corresponding information to the header of the sent message according ...

1, Security technology and firewall 1.1 safety technology Intrusion detection systems: it is characterized by not blocking any network access, quantifying and locating from internal and external networks The threat situation is mainly to provide alarm and post supervision, and provide targeted guidance measures and safety decision-making ...

Students who have written network programs should all know the connect function. Before the socket starts reading and writing operations, it is necessary to connect, that is, the TCP three-time handshake. This process is completed in the connect function. The connect function itself is blocked. The asynchronous connect function can be realize ...