I have a server on a dmz that can ftp a file using the web browser and you can connect to the ftp server via the command line. However, when one of the developers tries to use a script to transfer the file it does not work. Additionally, when you connect to the ftp server via the command line and try to run the ls command you receive an error message saying " 500 illegal port".
I know that ftp is allowed on the firewall and ftp is part of the default global inspection policy. It looks like this is a PASV vs active issue. However in windows it does not allow you to swtich to passive mode.
Other then opening up all high level ports for this connection , does anyone have a suggestion on what/ if anything I can do on the firewall?
Could you provide details as to where is the client located with respect to the ASA and also IP address details of the ASA and the server along with the current ASA config (with altered IP addresses if needed)? We can go through that and see if we notice anything wrong on the ASA.
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...