Prev

Next

The detailed difference between 4G industrial router...   4G industrial router and 4G DTU both realize the wireless network data transmission function, and the differences between them are mainly from the use method, appearance interface and application environment, etc. Today, we will introduce some differences between 4G router and 4G DTU.   Different methods...

更多文章

Application analysis of iot sensing technology   The Internet of things (iot) is widely used in the integration of networks through intelligent perception, recognition technology, pervasive computing and other communication perception technologies. The iot is understood as "Internet connected by things". The Internet of things (iot) connects all objects with...

更多文章

What is a single/dual frequency wireless 4G router 1. Introduction to "single frequency" router The single-frequency router only works in the 2.4ghz band, which is generally supported by wireless terminals. However, the 2.4ghz band has large interference, which may affect the wireless rate and stability.   2. Introduction to "dual-frequency" router Dual-frequency...

更多文章

Wireless communication DTU features Data Transfer unit (DTU) is a wireless terminal device specially used to convert serial Data into IP Data or convert IP Data into serial Data for transmission through wireless communication network.   DTU advantages: Rapid and flexible network, short construction cycle, low cost; Wide network coverage; Good...

更多文章

The advantage of using wireless data transmission module... Data transmission can be simply divided into two major types: wired (including the installation of optical cables, cables or leased telecommunication lines) and wireless (including the establishment of dedicated wireless data transmission system or the borrowing of CDPD, GSM, CDMA and other public network information platforms).     In...

更多文章

twitter

工业路由器防火墙的局限性和什么是物理隔离

文章目录 : 产品文章

  防火墙的局限性。4g路由器

  (1)防火墙只能防范经过全网通工业级路由器防火墙的攻击。没有经过全网通工业路由器防火墙的数据,防火墙不能检查。

  (2)防火墙防外不防内。

  (3)防火墙由于在配置和管理上比较复杂,所以容易造成全网工业路由器安全漏洞。

  (4)防火墙无法防范病毒,抵御数据驱动式的攻击。

  (5)防火墙不能防止利用标准网络协议中的缺陷以及服务器系统的漏洞进行的攻击。

  (6)防火墙不能防止全网工业级路由器本身的安全漏洞的威胁。

  4g无线路由器:什么是物理隔离。中国电子政务网之间与外网之间是什么关系。全网路由器物理隔离是指内外网络在物理上是完全独立、断开的,没有任何物理连接,但在逻辑上则保持连接,能够进行适度的数据交换。关系:电子政务内网和电子政务外网之间是物理隔离,电子政务外网与公网之间是逻辑隔离。物理隔离的原理1正常情况下,全网通路由器隔离设备和外网、隔离设备和内网、外网和内网之间是完全断开的。隔离设备可以理解为纯粹的存储介质和一个单纯的物理隔离控制设备。2当外网需要有数据到达内网的时候,以电子邮件为例,外部的服务器立即发起对工业4G路由器隔离设备的非TCP/IP的数据连接,隔离设备将所有的协议剥离,将原始的数据写入存储介质。根据不同的应用,可能有必要对数据进行完整性和安全性检查,如防病毒和恶意代码等。3一旦数据完全写入隔离设备的存储设备,隔离控制设备立即中断与外网的连接。转而发起对工业级4G路由器内网的非TCP的数据连接。隔离设备将存储设备内的数据推向内网。内网收到数据后,立即进行TCP/IP的封装和应用协议的封装,并交给应用系统。在工业路由器隔离控制设备收到数据传输结束的消息后,隔离设备立即切断隔离设备与内网的直接连接。这时整个网络又重新恢复到完全隔离状态。4如果这时内网有电子邮件要发出,隔离控制设备收到内网建立过接的请求后,建立与工业级路由器内网之间的非TCP/IP的数据连接。隔离设备剥离所有的TCP/IP和应用协议,得到原始的数据,将数据写入隔离设备的存储介质。如果有必要,就对其进行防病毒处理和防恶意代码检查,然后中断与双卡路由器内网的直接连接。

  标签:无线路由器   4g无线路由器

发表评论

You must be logged in to post a comment.