cisco packet tracer sample network download

access-list 1 permit 192.168.1.0 0.0.0.GNS3 is used by hundreds of thousands of network engineers worldwide to emulate, configure, test and troubleshoot virtual and real networks. Note the wildcard mask used in the access-list configuration for the /24 network. The following configuration deny administrative access to the router except for the 192.168.1.0/24 network hosting admin workstations. The access-class command is used to apply the access list on the Virtual Terminal Line.

Only numbered access-lists are supported on the Virtual Terminal Line. Placing the ACL near the destination will make the trafic travel through the network before beeing blocked, resulting in bandwidth waste.Īccess-list 1 permit ip 10.2.25.0 0.0.0.255 10.1.0.0 0.0.255.255Īccess-list 101 permit icmp any 10.1.0.0 0.0.255.255 echoĪccess-list 1 deny ip any any Configuration on Cisco 2911 ISR Router Restrict remote telnet or SSH access to the ISR routerĪccess lists can be used to restrict remote SSH or Telnet access to the ISR router management interface (VTY) from specific networks only. This kind of ACL has to be placed near the source as it allows fine grained control to ressources accessed.

Such ACLs can also be named access lists in which the ACL number is replaced by a keyword. In numbered ACLs, the access-list number can be any number from 100 to 199 or 2000 to 2699 (available in IOS versions >12.0.1). Extended ACLs : Introduced in IOS version 8.3, the extended ACLs are more complex and allow filtering of the IP traffic based on a combination of multiple criterias : source IP address, destination IP address, TCP or UDP port, protocol.This kind of ACL has to be placed near the destination to avoid blocking legitimate trafic from the source.

The access-list number can be any number from 1 to 99. Traffic is filtered based on the source IP address of IP packets. Standard ACLs : This is the oldest ACL type which can be configured on Cisco routers.Two types of IP ACL can be configured in Cisco Packet Tracer 7.2 : Verify the fastethernet 1.1 configuration using the show ptp port IOS command to make sure PTP clock is forwarded on the network interface. Verify PTP global configuration using the show ptp clock command Switch#show ptp clockĬlock Identity: 0x00:50:0F:FF:FE:0A:9D:00

Cisco packet tracer sample network download