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for 12 s until the router is started, and then change the default value of the Super Terminal bit, the communication baud rate is set to 9600, the data bit is 8, the parity bit is 1, and the stop bit is 1. After the connection is reconnected, you can see from the terminal that it is in the ROM status. Note: When the baud rate is 1200, NO content is displayed on the terminal. This method is applicable to vr
1. Preface A large number of Cisco routers are used in Jiangxi IP networks. Administrators usually use Telnet to remotely log on to the vro for routine maintenance. Because Telnet, FTP, and other network service programs use plain text transmission passwords and data in the network, their security cannot be effectively guaranteed. Once the Administrator's user name and password are intercepted by someone w
kind of configuration can best meet security needs without compromising network performance? This article describes the following parts: Cisco Router Security Configuration. Password Management A vro uses a password to prevent unauthorized access to the vro and is a part of the security of the vro. The best way to han
Introduction to CISCO router AAA and related routing configuration cisco aaa www.2cto.com 3A concept: authentication authorization Accounting accountingcisco provides a variety of 3A services for routers and switches: 1. Self-contained AAA router/NAS self-contained AAA service NAS (Network Access Server) 2. Contact the
Line Protection basically requires that the devices connected to the internet have a ground line, including hosts, workstations, hubs, switches, routers, and MODEM connected To routers. A terminal or PC configured with a Cisco router must also use a valid power supply. Cisco synchronous serial interfaces are commonly used. Different interfaces can be obtained th
the PC: for example, use the TERMINAL program in WINDOWS, use COMl/2, 9600BPS, 8 data bit, 2 stop bit. Others use the default value. After the control port is connected, turn on the power switch of the router. Initialize Installation The vro must use a valid power supply. Generally, the zero-ground voltage of the power supply is less than 4 volts, and the zero-fire/ground-fire voltage is 220 volts. Ground Line Protection basically requires that the d
CISCO PT Simulation Experiment (13) router RIP dynamic routing configurationExperimental Purpose :The configuration method of mastering RIP Dynamic route selection protocolMastering RIP routing descriptions in routing tablesFamiliar with the principle and process of Routing and Packet forwardingExperimental Background : The company is connected to the export route
As a port device connecting WAN, vrouters have been widely used. Their main function is to connect multiple independent networks or subnets to achieve optimal routing and datagram transmission between the Internet. This article takes the Cisco 2511 vro as an example to introduce four router configuration methods. 1. Use the Cisco
, a PPP frame on its hardware chip can be used to eliminate the overhead of the router's central processor. This feature ensures that the router maintains a high-speed connection over all asynchronous ports at the same time. This is useful in actual management. Especially when several network management experts jointly discuss network faults, the value will be reflected. However, although secondary ports are used as Asynchronous ports, they cannot ach
network will be fatal. Therefore, to improve security, the Cisco router sets password management for the Auxiliary port. Therefore, it is recommended that the network administrator do not use the same password as other passwords in password settings. Otherwise, the security
# shrun Translating "shrun" Translating "shrun" % Unknown command or computer name, or unable to find computer address to avoid this type of situation, you can disable DNS lookup and enter the global mode Router (config) # no ip domain-lookup to disable command 2. Configure the ip address (for example, the ip address configured for the f0/1 interface is 192.168.1.1, the subnet mask is 255.255.255.0) Router
access a vro, further configuration is required to restrict further access to the vro. Most Cisco routers are still controlled through remote logon and do not adopt any encryption method. Communication Using Remote logon is transmitted in plain text, which easily exposes the logon password. Although CiscoIOS12.1 adopts the SSHl encryption method, there are still many problems. Before
services such as BIND, IMAP, POP, and sendmail, which are frequently problematic in UNIX systems. Although there are few ways to access a vro, further configuration is required to restrict further access to the vro. Most Cisco routers are still controlled through remote logon and do not adopt any encryption method. Communication Using Remote logon is transmitted in plain text, which easily exposes the logon passw
of the server. For the current configuration, the security vulnerabilities are as follows: 1. IP Address Spoofing causes abnormal Connection Reset)2. TCP spoofing session replay and hijacking) The cause of the above risks is that the router cannot monitor the TCP status. If the NetEye firewall is placed between the client and the vro in the Intranet, because the NetEye firewall can detect the TCP status and generate a TCP serial number randomly, this
there are few ways to access a vro, further configuration is required to restrict further access to the vro. Most Cisco routers are still controlled through remote logon and do not adopt any encryption method. Communication Using Remote logon is transmitted in plain text, which easily exposes the logon password. Although CiscoIOS12.1 adopts the SSHl encryption method, there are still many problems. Before
number of Logon failures is 0. This information shows your settings, including the default login delay of one second, and other additional information. It also tells you that the current vro is in normal mode, which means that the vro currently allows you to log on. If a Cisco router deems it attacked, it enters quiet mode and begins to reject all login operations. You can also configure an ACL to indicate
the figure below. Configuration process and test procedure Before implementing the configuration, check whether the hardware and software support VPN. For Cisco router configuration, the IOS version must be later than 12.0.6 (5) T and provide the IPSec function. This configuration is successfully configured on the Cisco rout
privileged mode, you must set a privileged mode password or configure telnet user rightsConfigure the Vty line login password and enable global password encryptionLog on to the router with the Telnet command to seeDisplay current configuration informationPC0 setting 192.168.1.2255.255.255.0192.168.1.1Router0 configura
Maybe many people do not know the actual application of the NetEye firewall and the Cisco router. Next we mainly analyze the security problems of the NetEye firewall and the Cisco router. Firewall has become a key part of enterprise network construction. However, many users think that there are already routers in the n
In fact, many brands of vro configuration commands are very similar. Therefore, this article provides a comprehensive analysis of commonly used Cisco vro configuration commands for Cisco vrouters, at the same time, I learned more. The basic status of a vswitch with the Cisco router configuration command: Switch:; ROM s
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