Hi,
IOS SLB supports the following protocols:
Domain Name System (DNS)
File Transfer Protocol (FTP)
Hypertext Transfer Protocol (HTTP)
Hypertext Transfer Protocol over Secure Socket Layer (HTTP-S)
Internet Message Access Protocol (IMAP)
Mapping of Airline Traffic over IP, Type A (MATIP-A)
Network News Transport Protocol (NNTP)
Post Office Protocol, version 2 (POP2)
Post Office Protocol, version 3 (POP3)
RealAudio/RealVideo via HTTP
Remote Authentication Dial-In User Service (RADIUS)
Simple Mail Transport Protocol (SMTP)
Telnet
X.25 over TCP (XOT)
I got this information from the following document.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121newft/121limit/121e/121e3/iosslb3.htm
I am not sure about whether it supports Novell or MS ftp servers.