I have a CE 7305 with ACNS 188.8.131.52 and one of my customer has a odd problem. The description is that whenever someone inside the networks tries to connect to for ex. the IBM ftp server (ftp.software.ibm.com) it hangs on either the PASV or the CWD. When i stop filtering the ftp traffic thorugh the CE everything is ok. The problem however does not show itself in for ex. ftp.dell.com ftp.cisco.com, but ftp.software.ibm.com ftp.FreeBSD.org show the same pasv problem.
When sniffing the traffic it shows no anomilies in the traffic between a ftp that works or the ftp that doesnt work.
Has any one had a similar experience ? or any one have any ideas where the problem may be. I?ve tried with and without "ftp-native proxy active-mode enable".
As a side node im actually running two CE with load balancing.