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Opening Port Range for Cisco ASA 5505

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13 years 3 months ago #36011 by valjon
Dear Friends, after i changed the network struckture, all messangers stop working unless if i NAT out the workstaion ip, why this happen any clue?.

now what i have internet router----connect to ASA5510 firewall ----connetct to L3 3560 cisco switch inter vlan router
connect to WAN router 2911 cisco----connect to remote sites.

now none of the users in the LAN or WAN can use messnager. I have ISA server in the DMZ it gate way is the firewall, so if i setup the workstation with ISA as the gate way or NAT the ip address of the workstation on the firewall it will work fine they can access messanger, but if i setup the gate way as the router or the L3 cisco switch messnager can not work i beleive it is a port issue can any one help me figure out what ports should i enable on the fire wall if it is port issue, any idea please help and if a port issue what is the command to open that port.

Thank you all for ur help

Eng. Ibrahim Hamid
Senior Network & Security Engineer/IT Academy lead Instructor
IT Department Arts, Sciences and Technology University in Lebanon Hamra, Commodore street.
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