I have ASA 5550 VPN Premium license. But i am having strange problem with it. I am not able to do the ASDM from outside interface. I have no access-list no specific policy, from outside interface I am only able to do the SSH, even telent is not working.
There is no connectivity issue, Please help me out how to solve this problem.
Try telnetting to port 443 from outside to see if you are able to connect to the port. If you cannot, I would check the logs to see if you are getting blocked. The ASDM image may also be corrupted. I would suggest deleting the asdm-523.bin from flash and re-downloading and copying over the image to the ASA.
Also, I think that telnet is only allowed on the outside interface if it comes through a vpn tunnel. It requires encryption to be used on the outside interface and should show up in the logs as such with debugging logging on.
I have the same issue running 8.0(3) on an ASA5520, oddly enough, it works following a device reload, for a limited amount of time, and I also have oher ASAs with the exact same OS/management configuration, which I can access via ASDM fine.
Based upon this I am thinking it must be a hardware fault, or intermittent OS fault. I will let you know what I am able to find out. Please advise also, if you find a fix.
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...