Hi, i have a new ASA appliance without any configuration except interface configuration, which i have configure an IP to perform port scan using port scanner. The port scan result showed the new ASA 5540 appliance default is opened with port 110 and 25, how can i disable or close these 2 open ports ? Pls. advise.
No, ASA does not have these ports open by default. It may be another host (most probably an exchange server) that port scanner scanned, or security-levels mis-configured, or an acl exist to permit this specific traffic.
Hi, thanks for the replying, for your information, this ASA is a new box which is not connected to any network, i just configured one of the interface with IP and use my scanner tool to scan the interface, and the scanner result showed that the ports 110 and 25 are opened. Pls. advise if possible. Thanks
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...