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accessed through the extranet IP.To turn on NAT:Global (outside) 1 interfaceNat (inside) 1 192.168.3.0 255.255.255.0Do port mapping:static (inside,outside) TCP interface 192.168.3.222 3389 netmask 255.255.255.255To do access control for an external network port:Access-list outside_access Extended permit IP any anyAccess-group Outside_access in Interface OutsideThe above directive realizes, the external network user accesses the internal terminal thro
Cisco's ASA Firewall is a stateful firewall that maintains a connection table (conn) about user information, by default the ASA provides stateful connections to TCP and UDP traffic, and is non-stateful to the ICMP protocol.The message traversal process for Cisco ASA is as fo
(config) # IP default-Gateway 192.168.8.1 M1 M1 (config) # int VLAN 1M1 (config-If) # IP add 192.168.8.1 255.255.255.0M1 (config-If) # No sh Port ing on asa1 Asa1 Ciscoasa (config) # static (inside, outside) TCP int telnet192.168.8.8 Telnet netmask 255.255.255.255 Add an entry in the ACL to allow R1 to access port 23 of E0/1.Ciscoasa (config) # access-List Test permit TCP 12.0.0.1 255.255.255.255 12.0.0
with the interface IP IP address xxxxASA Traffic Forwarding1, Traffic forwarding modeOutbound traffic: From high security level to low level traffic.Inbound traffic: From Low security levels to high-level traffic.2, the way of forwarding processing traffic, the work process.A, only for TCP and UDP traffic, all other traffic to kill.b, the process of working from a high security level to a low security level.The routing table of the local
Cisco ASA Advanced Configuration first, to prevent IP Shard Attack 1 , Ip the principle of sharding; 2 , Ip security issues with sharding; 3 , Prevention Ip Shards. these three questions have been described in detail before and are not introduced here. For more information, please check the previous article:IP sharding principle and analysis. Second, URL Filter Use AS
TopologyRequirement: You can use the Cisco Firewall ASA to access servers in the Internet and DMZ through the Intranet. servers in DMZ can be published to the network for access by Internet users.I. Use of Cisco simulated FirewallBecause we do not have real devices, we use a virtual system using the Linux kernel to simulate Cisco's firewall. The simulated firewal
When Cisco routers are routed first, when Nat first may be known, inside is routed first, outside is first Nat.Well, for Cisco ASA, it is not the case, most of the first to find the route if the data from inside, in both cases Nat will first route to confirm the interface. Did the purpose NAT conversion Static NAT session exists Once you know th
Cisco ASA iOS upgrade or RestoreFirst, pre-upgrade preparation work1 , prepare the iOS file you want to upgrade and the corresponding ASDM file2 , set up TFTP on a computer, configure the directory, and connect to the firewall (assuming the computer IP is 192.168.1.2)Second, upgrade steps1 , Telnet on the ASAasa>en// Enter privileged modeAsa#conft// Enter configuration mode2 , viewing files on the
AutoSpeed auto!ROUTEROSPF 10Log-adjacency-changesNetwork 2.2.2.0 0.0.0.255 Area 0Network 10.10.20.0 0.0.0.255 Area 0Network 172.16.255.128 0.0.0.63 Area 0!Line Vty0 4Password CiscoLogin LocalTransport input Telnet3, The exchange of visits between the site test :r1#ping 202.16.1.9 Source 10.10.10.10// user Access to the InternetTypeescape sequence to abort.Sending5, 100-byte ICMP Echos to 202.16.1.9, timeout is 2 seconds:Packetsent with a source add
In this article, I'll briefly explain the Active/standby failover configuration on the Cisco ASA. The lab is do in GNS3. Physical topology: ConfigurationCiscoasa/act/pri (config) # sh run failoverFailoverFailover LAN Unit PrimaryFailover LAN Interface failover_stateless GIGABITETHERNET0/2Failover link failover_stateful gigabitethernet0/1Failover interface IP failover_stateless 169.254.0.15 255.255.255
the R2 on the ASA makes a static NAT, converted to 222.222.222.222ASA1 (config) # static (dmz,outside) 222.222.222.222 192.168.20.1 //configuration will 192.168.20.1 thisAddress is converted to 222.222.222.222, note that the public address is written in frontMake a backhaul route on the R3R3 (config) #ip Route 222.222.222.222 255.255.255.255 13.0.0.1Ping the 13.0.0.3 test on R2650) this.width=650, "src=" Http://s4.51cto.com/wyfs02/M00/76/DB/wKioL1Zdr
Cisco ASA iOS Upgrade or RestoreFirst, pre-upgrade preparation work1. Prepare the iOS files to be upgraded and the corresponding ASDM files2. Set up TFTP on a computer, setup the directory, and connect with the firewall (assuming the computer IP is 192.168.1.2)Second, upgrade steps1 , Telnet on the ASAasa>en//Enter privileged modeAsa#conft//Enter configuration mode2 , viewing files on the
process Object Network 50.30_4172 NAT (inside,outside) static 202.202.202.202 service UDP 4172 4172 object n Etwork 50.30_8443 Nat (inside,outside) static 202.202.202.202 service TCP 8443 8443 object Network 50.30_443 Nat (Inside,outside) static 202.202.202.202 service TCP HTTPS 8888 Object Network 50.30_22 NAT (Inside,o utside) static 202.202.202.202 SERvice TC
There are many VPN products on the Cisco ASA Web VPN configuration market and their technologies are different. For example, in the traditional IPSec VPN, SSL allows the company to achieve more remote users to access the VPN in different locations, this service enables more network resources to be accessed and has low requirements on client devices, reducing the configuration and operation support costs. Ma
package, but also disconnects other packets. D. policy-map can be used to prohibit ASA from disrupting the serial number. Iii. Test topology: 650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/0630302446-0.jpg "title =" 1.JPG" alt = "223453812.jpg"/> 4. Basic Configuration: A. Outside router:Interface Ethernet0/0 Ip address 202.100.1.1 255.255.255.0 No shutline vty 0 4 Password cisco
In actual cases also encountered this kind of problem, the customer intranet has a server map on the Internet, extranet user access Global-ip no problem, but intranet users want to access Global-ip will not pass, typical is the user will intranet server made public network DNS a record, Both internal and external networks are accessed through domain names.JUNIPER series equipment including NETSCREEN/ISG/SSG no such problems, directly through the ordinary dip can be achieved, the subsequent produ
Question:I often use the ping command and tracert command to check the status of hosts on the network to see if they are running normally. However, recently, the company's network management has set a policy on routers and servers to completely disable icmp. As we all know, the ping and tracert commands use the icmp protocol. In this case, I cannot use the preceding two commands to check the host status on
I. troubleshooting commands 1. show command: 1) Global commands: Show version; displays the system hardware and software versions, DRAM, Flash Show startup-config; displays the configuration content written into NVRAM Show running-config; displays the currently running configuration content Show buffers; Detailed output buffer name and size Show stacks; provides the router process and processor utilization information, using stack decode Show tech-support; displays the output of several show com
5th Cisco Test commands and TCP/IP connection failure handlingFirst, fault handling commands1. Show command:1) Global command:Show version; Display system hardware and software versions, DRAM, FlashShow Startup-config; display the configuration content written in NVRAMShow Running-config; display the currently running configuration contentshow buffers; the name and size of the verbose output bufferShow stac
I. troubleshooting commands 1. show command:1) Global commands:Show version; displays the system hardware and software versions, DRAM, flashShow startup-config; displays the configuration content written into NVRAMShow running-config; displays the currently running configuration contentShow buffers; Detailed output buffer name and sizeShow stacks; provides the router process and processor utilization information, using Stack decodeShow tech-support; displays the output of several show commandsS
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