First, a diagram.
Windows Server
|-- 10.199.8.15
|
Windows |
Workstation | z/VM 5.3
10.200.70.35 ------ Firewall ------ 10.199.103.48
|
|
| Windows laptop
|-- 10.199.16.x
We are attempting to FTP from the Windows PC at 10.200.70.35 to the
three addresses on the 10.199 network. Our network guy says that the
three 10.199 addresses have been fully opened on the firewall for
10.200.70.35 to access. That is, all ports are available.
- 10.200.70.35 can FTP to 10.199.16.x, the network guy's laptop.
- When 10.200.70.35 attempts to FTP to either 10.199.8.15 or
10.199.103.48, the FTP hangs at userid and password validation for
several minutes before dying.
- Several people have confirmed that the userid and password are
correct.
- The Windows Server at 10.199.8.15 is tightly access controlled.
- z/VM at 10.199.103.48 does not restrict FTP access by IP address,
just userid and password.
- z/VM can FTP to 10.199.8.15.
- Various servers and workstations can FTP to z/VM.
- Pings are blocked by the firewall, but a TRACERTE from z/VM seems to
show 10.200.70.35 can be reached, just no TTL information.
Our network guy is really busy at the moment, so I'm wondering if there
is anything I can look at on z/VM that would show why the FTP logon is
hanging/failing.
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