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What is permit TCP?
permit tcp any any eq Allows any traffic with a destination TCP port == protocol-port permit tcp any eq any. Allows any traffic with a source TCP port == protocol-port.
What does TCP any mean?
TCP stands for Transmission Control Protocol a communications standard that enables application programs and computing devices to exchange messages over a network. It is designed to send packets across the internet and ensure the successful delivery of data and messages over networks.
What does permit TCP any any established do?
It permits traffic. It allows TCP traffic. The source that it is allowed from is any host. The TCP traffic that is allowed is any traffic on an established session.
What’s the difference between ” Permit TCP any any “?
I’m a CCNA student and during a LAB I found that for some rules on an incoming extended ACL using a rule like permit tcp any any eq (protocol) would work fine while on other rules I needed to use the format permit tcp any eq (protocol) any. Just wondering what the difference is?
Which is the permit keyword in access control list 100?
access-list 100 permit ip any any The first statement permits Telnet traffic from all hosts assigned to subnet 192.168.1.0/24 subnet. The tcp keyword is Layer 4 and affects all protocols and applications at Layer 4 and higher. The permit tcp configuration allows the specified TCP application (Telnet).
How is Telnet traffic from netb to Neta permitted?
This figure shows how Telnet traffic from NetB (public) destined to NetA (private) is denied, which permits NetA to initiate and establish a Telnet session with NetB while all other IP traffic is permitted. Telnet uses TCP, port 23.
What does deny TCP with no application specified mean?
All web applications are TCP-based and as such require deny tcp. The keyword www specifies HTTP (web-based) traffic. The deny tcp with no application specified will deny traffic from all TCP applications (Telnet, SSH, HTTP, etc).