We recently updated a GB 3.2.5 and made a few changes to it's
filters/etc. After doing so, users on a natted internal subnet can no
longer hit external subnets via tcp which are on the GB (being passed
through with IP Passthrough). This worked fine before the upgrade.
Basically, what's happening, is the traffic should be going like so:
Workstation-Internal Subnet -> Gnatbox (NAT) ->
Same GB (IP Pass (external IP)) ->
Server-External Subnet
It makes the request, seemingly making the tcp connection, but then
hangs. ICMP and UDP work fine.
An example, if I telnet to port 25 on one of the external subnet mail
servers, it will open the telnet window and hang. I pass it a couple
carriage returns, and nothing happens. No banner - nothing. It will
eventually say the connection was lost to the host.
The logs, surprisingly, don't seem to be showing anything but a standard
connection opening and closing. No errors that I see.
Anyone else having stuff like this? I've tried adding "ACCEPT ANY ALL from
ANY to ANY" filters to the top of all the lists. (outbound, remote access,
IP Passthrough Filters, etc) to no avail.
Suggestions? Bug Report? :)
Thanks.
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