If none of the router's interfaces are connected to the destination address, the router discards the packet.An access list is a set of additional commands or instructions that you can instruct a router to perform before forwarding IP packets. In the access list, each command or instruction is...
“no access-list access-list-number”将会删除整个ACL列表 例:access-list 11 permit s192.168.1.0 0.0.0.255 例:access-list 11 permit s192.168.1.0 0.0.0.255 如果在最前加no,则整个ACL11被删除 Router(config-if)# ip access-group access-list-number {in|out} 在接口中应用 应用时关联入或出站方向 ...
思科Cisco路由器access-list访问控制列表命令详解 标准型IP访问列表的格式 --- 标准型IP访问列表的格式如下: --- access-list[list number][permit|deny][source address][address][wildcard mask][log] --- 下面解释一下标准型IP访问列表的关键字和参数。首先,在access和list这2个关键字之间必须有一个连字...
Some access control lists are comprised of multiple statements. The ordering of statements is key to ACL processing. The router starts from the top (first) and cycles through all statements until a matching statement is found. The packet is dropped when no match exists. Order all ACL statements...
Cisco routers support the remote management feature. For this feature, routers use virtual type terminals (VTY). When you access a router remotely, the router associates the remote connection to a virtual type terminal (VTY). You can use the assigned virtual terminal to execute commands. ...
An Access Control List (ACL) is a list of rules that control and filter traffic based on source and destination IP addresses or Port numbers. This happens by either allowing packets or blocking packets from an interface on a router, switch, firewall etc.
If the access list is inbound, when the router receives a packet, the Cisco IOS software checks the access list's criteria statements for a match. If the packet is permitted, the software continues to process the packet. If the packet is denied, the software discards the packet. ...
An access list can be configured and named, but it is not in effect until the access list is referenced by a command that accepts an access list. Multiple commands can reference the same access list. An access list can control traffic arriving at the router or leaving the r...
Cisco CCNA Why Use ACLs? An access list (ACL) is a mechanism for identifying particular traffic. One application of an access list is for filtering traffic into or out of a router interface. There are numerous different types of ACLs. IP standard access lists filter on source ...
As traffic reaches the router interface, it’s checked against the ACL. If it is permitted, it is routed and then sent to the outbound interface. To see the full list of the order in which the router processes incoming and outgoing traffic, please Google “Cisco router order of operations...