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Three attack methods bypass Cisco TACACS + Original article: 3 attacks on cisco tacacs bypassing In this article, the author introduces three methods to bypass TACACS on Cisco devices.No.1 DoS attacks bypass Cisco TACACS + No. 2 Local cracking PSK bypass Cisco TACACS + No. 3
1. Tacacs + Overview 1.1 What is TACACS +TACACS + (terminalaccess Controller access control system, Terminal Access Controller Control Protocol) is a feature-enhanced security protocol based on the TACACS protocol. The protocol is similar to the RADIUS protocol and uses client/server mode for communication between NAS
Catalyst 4000 and Catalyst 5000 of the Catalyst Switch series (Catalyst 6000, running CatcOs) support some form of authentication, starting with code 2.2. Added the latest version. TACACS + (TCP port 49, not xtacacs udp port 49), remote access dial-in user service (RADIUS), or Kerberos server users set to authentication, authorization, and accounting (AAA) is the same as a router user. This article contains examples of the smallest commands that must
1. Authentication) 1.1 ACSAdd AAA Client 1. Enter ACS, click network configuration, 2. Click Add entry to add AAA Client 3. Enter the hostname, Client IP add, shared secret, and authenticate using, select TACACS + (Cisco IOS), and click Submit + apply. 1.2Switch configuration: Switch (config) Aaa New-Model Switch (config) tacacs-server host 192.168.2.1 key Cisco Switch (config) Aaa authentication login
Cisco NX-OS software TACACS + Server Local Privilege Escalation Vulnerability Cisco NX-OS software TACACS + Server Local Privilege Escalation Vulnerability Release date:Updated on: Affected Systems:Cisco NX-OSDescription:--------------------------------------------------------------------------------Bugtraq id: 65083CVE (CAN) ID: CVE-2014-0676 Cisco NX-OS is a data center-level operating system that rep
Tacacs + server deployment 1. Install the development environment # Yum-y install gcc make flex bison libwrap0-dev 2. download and install the tacacs + Software Package # Wget ftp://ftp.shrubbery.net/pub/tac_plus/tacacs+-F4.0.4.26.tar.gz # Tar-zxvf tacacs0000-f4.0.4.26.tar.gz # Cd tacacs +-F4.0.4.26 # Less INSTA
Download the TACACS package first 650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/6F/1B/wKioL1WSPPLCxvD5AABtHQmgkSg746.jpg "title=" 1.png " alt= "Wkiol1wspplcxvd5aabthqmgksg746.jpg"/>2. Install this package650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/6F/1B/wKioL1WSPRmSjqKhAAA68en2J9s782.jpg "style=" float: none; "title=" 2.png "alt=" Wkiol1wsprmsjqkhaaa68en2j9s782.jpg "/>3. Make sure that the logged-on user is available i
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 AAA service on the cisco secure acs router/NAS with the external cisco secure acs system 3. Contact the AAA service on the cisco secure acs solution engine router/NAS with the ext
on to the server to achieve billing. 1. xtacacsd package acquisition Xtacacsd can be downloaded from Ftp: // ftp.navya.com/pub/vikas. The downloaded file is often compressed format (such as: xtacacsd-4_1_2_tar.gz), save the downloaded file to a specific directory, such as/usr, and then decompress. # Gunzip xtacacsd-4_1_2_tar.gz # Tar xvf xtacacsd-4_1_2_tar 2. xtacacsd compilation and Installation First go to the/usr/xtacacsd-4.1.2 directory, Then, modify the statements in the
1. Building a tacacs + server TACACS + (Terminal Access Controller access control system, terminal Access Controllers Control Protocol)is a function-enhanced security protocol based on the TACACS protocol. Similar to the capabilities of the RADIUS protocol, the protocol uses client/server mode to communicate between NAS and T
. TACACS + provides independent authentication, authorization, and accounting services. Although RADIUS integrates authentication and authorization in the user configuration file, TACACS + separates these two operations, the difference is that TACACS + uses the Transmission Control Protocol (TCP) while RADIUS uses the user Message Protocol (UDP ). most administra
There are two methods for the AAA Server; one is the RADIUS server, and the other is the Terminal Access Controller Access Control System TACACS + 1. radius Configuration AAA New-model startup AAA authentication login default radius local use the default method list to set the authentication method for login (if you cannot connect to the radius, use the local authentication method) AAA authentication PPP default local group radius (use the default met
650) this.width=650; "src=" Http://s2.51cto.com/wyfs02/M00/8A/B9/wKiom1g4903CKOQdAABGAuHRaZQ582.png "title=" Screenshot.png "alt=" Wkiom1g4903ckoqdaabgauhrazq582.png "/>！ Configure local user name and passwordR1 (config) #username hello privilege secret 0 World！ Account Opening AAAR1 (config) #aaa New-model！ Specifies that ACS is the TACACS server address-----old syntaxR1 (config) #tacacs-server host 192.16
chosen. Authorization-a way to provide remote access control includes one-time authorization or individual service licensing, each user account list and profile, user package support, and Ip,ipx,arp and Telnet support. Accounting-a way to collect and send information to a secure server, which is used to list bills, to audit and form reports, such as user identification, start and stop times, commands to execute, number of packages, and number of bytes. 4. RADIUS? RADIUS is a distributed client/
This document provides a way to set up a AAA service for VPN3000 using the Cisco Secure ACS Server: Overview: Cisco Secure ACS is a AAA server. The so-called AAA, refers to: Authentication (authentication): When NAS (Network access server network access servers) receives a user-authenticated request, it sends the information over UDP 1645 to the RADIUS server, and the server checks the user database to determine whether it is an authorized user. If so, the information is returned to the NAS fo
autoInterface ethernet1 autoMtu outgoing side 1500Mtu inside 1500Ip address outside pppoe setrouteIp address inside 10.80.1.254 255.255.255.0Ip audit info action alarmIp audit attack action alarmPdm history enableArp timeout 14400Global (outside) 1 interfaceNat (inside) 1 10.80.0.0 255.255.0.0 0 0Conducting it permit icmp anyTimeout xlate 3:00:00Timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h323 0:05:00 sip 0:30:00 sip_media 0:02:00Timeout uauth 0:05:00 absoluteAaa-server
Parameter settings The following assumes that the route name is nb-r-01 Log on to the route Nb-r-01> enable Password: "Enter enable secrect password Nb-r-01 # conf ter Enter configuration commands, one per line. End with CN Network ID Nb-r-01 # conf ter Nb-r-01 (config) # router rip Nb-r-01 (config-router) # network 202.96.102.0 Nb-r-01 (config-router) # network 202.96.100.0 Nb-r-01 (config-router) # network 202.96.101.0 The preceding command is used to let the route know all the networks
) # vpngroup test1 default-domain test.comPix (config) # vpngroup test1 split-tunnel NONATPix (config) # vpngroup test1 password ciscoPix (config) # vpngroup test2 address-pool ezvpn-pool2Pix (config) # vpngroup test2 dns-server 10.1.2.33Pix (config) # vpngroup test2 default-domain test.comPix (config) # vpngroup test2 split-tunnel NONATPix (config) # vpngroup test2 password cisco3> define a data stream that does not need to be converted to a NAT gateway.Pix (config) # access-list NONAT permit i
AAA billing supported by Cisco routers Step 1: configure the basic interface Router (config) # host Rack244R1Rack244R1 (config) # int e0/0Rack244R1 (config-if) # ip add 12.0.0.1 255.255.255.0Rack244R1 (config-if) # no shRack244R1 (config-if) # int e1/0Rack244R1 (config-if) # ip add 172.16.18.11 then (config-if) # no shRouter (config) # host Routing (config) # int e0/0Rack244R2 (config-if) # ip add 12.0.0.2 255.255.255.0cRack244R2 (config-if) # no sh www.2cto.com Step 2: configure AAA billing for
192.168.0.8 netmask 255.255.255.255 0 0Conduit permit ICMP any anyConduit permit TCP host 61.144.51.43 eq www anyConduit permit UDP host 61.144.51.43 eq domain any------provide domain-name service with 61.144.51.43 This IP address, and only allow external users to access the UDP port of domainRoute outside 0.0.0.0 0.0.0.0 61.144.51.61 1------External Gateway 61.144.51.61Timeout xlate------After an internal device has been translated (global) to an external IP packet, after the default of 3 hour
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