I have a Cisco ASA 5510. I have detected an infected workstation on my internal LAN which has caused my IP to be blacklisted by Barracuda Networks and other RBL. I have scanned and cleaned the workstation removing the spambot. I want to prevent all my internal workstations from sending SMTP traffic on Port 25 through my ASA 5510 device. I only need to allow my Exchange Server access to send out traffic on port 25. Can someone help me configure this setup using ASDM 5.0? I know it may be easier using CLI, but using the ASDM would really be preferred. Any help with this would be greatly appreciated. Thank you.
Jennifer, thank you for replying. I have attached a screenshot of the rules applied to the inside interface.The LAN IP for the Exchange is 192.168.115.4 and the inside interface for the ASA 5510 is 192.168.115.1.The attached image only shows the rules for the internal interface as you have requested. If you should need more information please let me know. Thank you.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...