How to exempt the DELL OMSA port number only on ESX Firewall?

How to exempt the DELL OMSA port number only on ESX Firewall?
(Without Disabling entire Firewall)

Dell Openmanage Installation on ESX

Firstly the standard steps (to Install OMSA):

1. Download the tar file from the ftp site or the support site
2. Copy the file using winscp(this is what i use at least) to /tmp/openmanage on the server
3. Log into the box either via winscp /via putty or onto the console directly and type in:

cd /tmp/openmanage
tar -zxvf OM_X.X.0_ManNode_A01.tar.gz (OM_6.2.0_ManNode_A00.tar currently)

4. Once the files have unpacked type in:
cd linux/supportscripts/
./srvadmin-install.sh -x (-x is for express install and installs everything but if you only want to install specific features the commands you can also use are -d -w -r –s )

-d = Dell Agent
-w = web interface
-r = DRAC services
-s = storage management

5. Once the files have unpacked and installed type:
srvadmin-services.sh start
6. When the various component services have finished starting type in:
cd /tmp
rm -rf Openmanage
7. To allow the Openmanage agent to function the following firewall commands
need to be run, these open the firewall ports required:
# esxcfg-firewall -o 1311,tcp,in,OpenManageRequest