Hi,

I'm running NG FP3 and Cluster XL (multicast mode) on Linux platform. I've
something setup like this :

WAN    NET1                      NET2
--- FW --- BIGIP (load balancer) --- FTPD

I've a problem with active FTP. When a client connects and do a PORT
command, it is silently droped by the firewalls (one time every 2
connexions). I see the FTPD sending the Syn, nating this Syn. Then the Syn
comes to the lan interface of the firewall but never reaches the Wan
interface of the firewall.

Clients are connecting to an ip in routed to the firewall then nated.
For example :
1/ client connects to 10.10.10.1 (Static nat on the firewall)
2/ Firewall do Destination NAT and send packets to a VIP on the BIGIP
(192.168.20.10)
3/ Bigip do Destination NAT and join the FTPD (192.168.21.10)

I don't understand why the firewall is droping the ftp-data syn.
Is there a way to look at this on the firewalls ? I did notice nothins on
smartview tracker ....

Thanks in advance for your answers.


Best regards,
--
Sebastien Cantos <[EMAIL PROTECTED]>
Network / System Manager
Neopost DIVA

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