ip - Source Address / Source Port vs Destination Address / Destination ...
I am new to TCP/IP and trying hard to learn basics. Well, I really wonder about inbound rules and outbound rules of firewall and concept of source address port, destination address port. For examp...
How to explain Source IP Address, Destination IP Address & Service in ...
Jun 6, 2010 · Hi, These three terms are common for network & firewall guy. However others who are not working in this are normally doesn’t really know what is the meaning of this terms. The problem start …
Why is there the source IP address in an IPv4 header?
Jun 30, 2015 · I didn't find any information about this on the Internet, because every website was just stating that it is in there, but never why. One thought I had is that the router can identify in which netw...
Cisco Access Control Lists (ACL) - Cisco Community
Nov 16, 2020 · The wildcard mask is a technique for matching specific IP address or range of IP addresses. Cisco access control lists (ACL) filter based on the IP address range configured from a …
How do you port forward using IP filtering rules? - Super User
Nov 23, 2023 · If you are able to leave source IP blank, then do so, if you are not, try 0.0.0.0 in source IP Addr, or if it wants both feilds completed, enter in 0.0.0.0 in both. in dest IP enter in 192.168.1.7, if it …
Type of Attacks - Cisco Community
Dec 18, 2013 · The source addresses of these requests are falsified to be the source address of the target. For each request sent by the attacker, many hosts on the subnet will respond flooding the …
How do IP answer packets reach their destination inside of a private ...
The packet reaches the web-server and still has an external source-IP-address which will be used as a destination-address for any reply. The server accordingly addresses the outgoing reply packet (s) in …
What's the difference between 127.0.0.1 and 0.0.0.0?
Aug 6, 2015 · Source: What is the meaning of the IP address 0.0.0.0 In the Internet Protocol version 4 the address 0.0.0.0 is a non-routable meta-address used to designate an invalid, unknown or non …
Network Tables: MAC, Routing, ARP - Cisco Community
Nov 15, 2020 · Any network connection is a logical connection between two endpoints. There is a source endpoint and a destination endpoint with two separate unidirectional flows established. All …
Traceroute behavior on Cisco routers IOS/IOS-XE
Nov 30, 2016 · As we make sure we have the same behavior. Cisco IOS and IOS-XE routers send reply with the IP-address of input interface due to the unreachable UDP port as against ICMP probe which …