Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Community Member

firewall ports

when i open ports up on a firewall, if I have some software that talks to something on say port 445, do I need to open the port inbound or in and out ?

1 REPLY
Blue

Re: firewall ports

ports can be set for inbound or outbound depending on any ACLs that may be in place. (you may need both in some circumstances)

generally speaking, on a firewall, to open a port means to open it for inbound traffic. (public users allowed access to your private network via that port)

if you have software inside your company that uses port 445 and it needs to talk to a device outside the firewall, be sure the firewall has outbound access for that port. (may require inbound as well if the external device needs to talk to port 445 back into your network)

if you have software outside your company that uses port 445 and it needs to talk to a device inside the firewall, be sure the firewall has inbound access for that port. (may require outbound as well if the internal device needs to talk to port 445 back out of your network)

154
Views
0
Helpful
1
Replies
CreatePlease to create content