The banner command is available in configuration mode.
The banner command configures a banner to display for the option specified. The text string consists of all characters following the first whitespace (space) until the end of the line (carriage return or LF). Spaces in the text are preserved. However, tabs cannot be entered through the CLI.
I am not quite clear what your issue is. The PIX achieves the same result of having a banner with multiple lines that is displayed, but it goes at it differently. In IOS you define a delimiter character and the banner starts at the beginning delimiter and continues to the next delimiter. So there is one banner command which may have several lines. In PIX you have multiple banner commands to have multiple lines in the banner.
So the specific answer to your specific question is that no the PIX can not generate a multiline banner with a single banner command. Is that a problem?
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...