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The_Bhattman
Altostratus
Altostratus

Problem this snippet solves:

Summary: An FTP proxy that simulates FTP proxies found on Bluecoat and Cisco Ironport Proxies.

Contribution

Bhattman at gmail dot com

How to use this snippet:

NOTE: You need to apply the FTP Profile

Code :

when CLIENT_DATA {
set ftplogin [TCP::payload]
log local0. "login is $ftplogin"
if { $ftplogin starts_with "USER" } {
# You can set it up to use any DNS server you want.
set dnslookup "4.2.2.1"
set cuser [TCP::payload]
scan $cuser {%[^@]@%s} garbage sitename
scan $garbage %s%s cmd uid
set ips [RESOLV::lookup @$dnslookup -a $sitename]
if {$ips eq "" } {
# Input wasn't an IP address, take some default action?
reject
} else { 
TCP::payload replace 0 [TCP::payload length] ""
set ftp_serv "[lindex $ips 0]"
node [lindex $ips 0] [TCP::local_port]
}
}
TCP::release
}

when SERVER_CONNECTED {
    TCP::collect 20
}

when SERVER_DATA {
  set serv_data [TCP::payload]
if { $serv_data contains "220" } {
TCP::respond "USER $uid\r\n"
TCP::payload replace 0 [TCP::payload length] ""
}
TCP::release
}

Tested this on version:

10.0
Comments

as a note - i've used the work behind this irule and modified it to handle a couple of exceptions and locally authenticate a user - code here - https://devcentral.f5.com/s/articles/unauthenticated-or-authenticated-ftp-proxy

 

Michael_N_Nkomo
Nimbostratus
Nimbostratus

Will use the upgraded one from RoutingLoop.

 

Version history
Last update:
‎17-Mar-2015 14:06
Updated by:
Contributors