management address, which is disabled by default and needs to be opened manually.
The permission levels on Cisco devices are from 0 ~ 15. The default Telnet mode is 1, and the maximum permission is 15. (Privilege level [0-15])
The login function is enabled for the vty line by default, which means you must set a password for it to log on.
Password 7 ***** cannot be used to set plain text. For example, if yo
With the development of the routing industry, the market demand is more extensive, but many users still do not understand the routing configuration issues. Here we mainly provide a comprehensive description of the Cisco router NAT configuration. More and more INTERNET resource sharing methods are available. In most cases, ddnleased lines are widely used with thei
#config terminal
Route (config) # line vty 0 4 ---- enter telnet remote login port mode (0 4 allows 5 Users)
Route (config-line) # password CISCO ---- set the password to "CISCO" (to encrypt the password, enable vro password protection before: service pass-encryption)
Route (config-line) # login ---- encrypted upon login
Route(config-line)#exit
Continue to enter the privileged mode and wh
following example:Example 1. Pix525 (config) # fixup protocol ftp 21Enable the ftp protocol and specify the ftp port number as 21.Example 2. Pix525 (config) # fixup protocol http 80Pix525 (config) # fixup protocol http 1080Specify port 80 and port 1080 for the http protocol.Example 3. Pix525 (config) # no fixup protocol smtp 80Disable the smtp protocol.
D. Set telnetTelnet has a version change. Before the pix OS 5.0 (the version number of the pix ope
. Setting up TelnetTelnet has a version of the change. Before the PIX OS 5.0 (the version number of the PIX OS), the PIX can only be accessed via Telnet from hosts on the internal network. In PIX OS 5.0 and later versions, Telnet to PIX Access can be enabled on all interfaces. When you want to telnet to the PIX firewall from the external interface, the Telnet traffic needs to be protected with IPSec, which means that the user must configure the PIX to establish an IPSec tunnel to another pix, ro
can run normally. However, it makes sense to rename a vro and uniquely identify it. Example:
Router (config) # hostname Router-Branch-23
In addition, you can configure a domain name on the router so that it knows which DNS domain it is in. Example:
Router-Branch-23 (config) # ip domain name TechRepublic.com
3. Set a password for privileged Mode
When talking about setting a password to enter the privileged
The following is a brief description of the configuration steps of 5505:1. Supervisor Engine Software Configuration:First, the Supervisor Engine Module needs an in-band (sc0) interface IP address, which is a manageable address and can be managed by telnet or SNMP for 5505. There is also an SLIPsl0 interface, which is not commonly used and is not described here.The default IP address of sc0 is 0.0.0.0, which belongs to vlan1. VLAN1 is the default VLAN
The Cisco 2511 router configuration method is used as a port device to connect to the WAN. The router has been widely used. Its main function is to connect multiple independent networks or subnets, achieve optimal path finding and data transmission between the Internet. This article takes the Cisco 2511 vro as an example
Release date:Updated on:
Affected Systems:Cisco Wireless LAN Control 7.2Cisco Wireless LAN Control 7.1Cisco Wireless LAN Control 7.0Unaffected system:Cisco Wireless LAN Control 7.2.103.0Cisco Wireless LAN Control 7.1.91.0Cisco Wireless LAN Control 7.0.220.0Description:--------------------------------------------------------------------------------Bugtraq id: 57524CVE (CAN) ID: CVE-2013-1104Cisco WLC is responsible for system-wide wireless LAN functions, such as security policies, intrusion prote
Routers are packet forwarding devices that work in the third layer of the OSI Reference Model-the network layer. Routers implement network interconnection by forwarding packets. Although routers can support a variety of protocols (such as TCP/IP, ipx/spx, AppleTalk, etc.), most routers in China run TCP/IP protocol. Routers typically connect two or more logical ports identified by an IP subnet or Point-to-Point protocol, with at least one physical port.
The router determines the output port and t
Cisco Catalyst Switch configuration and maintenance method. Today's Catalyst Switch topic discusses the introduction of the History st6000 series and the introduction of the Catalyst Switch 5000 Series. There is no difficulty. Hurry into the Wireless World.
LAN switches have evolved from a HUB-based LAN shared in the traditional sense to a broader space. Take Cisco's ipvst5000 series LAN switch as an
Cisco's Internet Operating System IOS) is a complex operating system optimized for the Internet. There are many IOS skills on the Internet, but most of the best skills are not enough to form a complete article. Today, I want to use one of the Chinese IT labs to describe five tips for using Cisco IOS. I believe these skills will definitely make the network administrators work more efficiently.
Tip: simplify command input
It can be asserted that almost
Basic information of the network
The network topology is: The central switch uses Cisco Catalyst 4006-s3,supervisor Engine III G engine in the 1th slot, for three-layer exchange, 1 24-Port 1000base-t module in the 2nd slot, for connecting to the network server; The 1 Block 6 Port 1000base-x module is located in the 3rd slot for connecting 6 backbone switches. One switch uses Cisco Catalyst 3550-24-emi and
address 172.16.39.2 255.255.255.0
Ip nat inside
!
Router VPN 1
Redistribute static
Network 172.16.0.0
Default-metric 10000 100 255 1 1500
!
Ip route 172.16.255.0 255.255.255.0 Null0
Access-list 1 permit 10.0.0.0 0.20.255.255
!
End
In our example, the Cisco WAN router runs a policy route to ensure that the I
P packets are sent to the firewall. Two net-10 policy rules are defined in the
Huawei router and the same class Cisco router in the functional characteristics and configuration interface is completely consistent, some aspects also according to the needs of domestic users made a good improvement. For example, in English and Chinese can be switched configuration and debugging interface, so that use
understanding the Spanning Tree principle, we can have a specific purpose. The command to reconfigure the Cisco router is as follows:
DispatchA # config terminal
! Select the ieee stp Spanning Tree Protocol.
DispatchA (config) # bridge 1 protocol ieee
! Select the router at the master scheduling end as the root bridge.
DispatchA (config) # bridge 1 priority 0
DispatchA (config) # interface ethernet0/0
DispatchA (config-if) # bridge-g
. Configure writable Community. The default product writable Community name is private.
Switch (config) # snmp-server community private rw
3. Change the SNMP Community password.
A. Group devices and enable various Supported SNMP versions
Switch(config)#snmp-servergroupqycx123v1
Switch(config)#snmp-servergroupqycx123v2c
Switch(config)#snmp-servergroupqycx123v3noauth
B. Configure read-only and writable community respectively, for example
, reducing network complexity and improving server management capabilities and large-scale scalability. Each UCS rack server is equipped with a VIF interface card that provides two Gigabit Ethernet interfaces. using Cisco Network virtualization technology, it provides both management network interfaces and operating system network interfaces.
FI is the old version of 6120, which is inconsistent with the new server version. Therefore, you need to set a
Overview of LAN switches
LAN switches have evolved from a HUB-based LAN shared in the traditional sense to a broader space. Take Cisco's Catalyst 5000 Series LAN switch as an example. It includes an integrated switching hardware structure, 10-Mbps Ethernet that supports switching, and-Mbps Fast Ethernet, supports fast Ethernet, FDDI, exchange-type ring, and layer-3 switching processing. This type of switch can provide exchange access to workstations,
principle, using a Udpecho request instead of a ICMPECHO request to initiate an attack.
While cyber security experts are focused on developing devices that block Dos attacks, they have little effect because Dos attacks exploit the weaknesses of the TCP protocol itself. Properly configured routers can effectively prevent Dos attacks. In Cisco routers, for example, the iOS software in
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.