What is the difference between wrting the port no. after source and after destination in ACL

[dt2012800]

What is the difference between wrting the port no. after source and after destination in ACL

ex : permit tcp host 10.1.1.1 eq 1389 10.2.2..0 0.0.255.255

And 

permit tcp 10.2.2..0 0.0.255.255 host 10.1.1.1 eq 1389

[Akash Agrawal · Accepted solution]

permit tcp host 10.1.1.1 eq 1389 10.2.2..0 0.0.255.255

Will permit TCP traffic from source 10.1.1.1 and source port 1389 to destination 10.2.0.0/16

permit tcp 10.2.2..0 0.0.255.255 host 10.1.1.1 eq 1389

will permit TCP traffic to destination ip 10.1.1.1 and destination port 1389 from source pool 10.2..0./16

So port number after source tells about source port and port number after destination tells about destination port

--Pls dont forget to rate helpful posts--

Regards,

Akash

[dt2012800]

Awesome ...!!! Thanks 

[gargaditya]

But if it is for eg.Telnet traffic..then how do we decide whether it is frm source side or destination side??wont it be telnet communication on both sides??

[Joseph W. Doherty]

See your posting: https://supportforums.cisco.com/discussion/12554126/acl-concept#comment-10635031