On Sun, Apr 30, 2000 at 09:23:17AM +0000, m9111_at_abc.se wrote:
> 
> Hello,
> 
> I have a Coda server running on Linux (RedHat 6.2) in a LAN, and also
> a few RedHat clients, and everything seems to work very nicely.
> 
> However, I also want to access the server from a box outside of the
> LAN (across the 'net), which is running Linux 2.3.99-pre3 with the
> pre6-7 coda patches applied.
> 
> The point is that from this machine, I can access the Coda testserver
> without any problems.  But when I access the main server, I cannot
> access any files.

Firewall?

> connection::bandwidth myserver.domain.se 21712 36813 120889 ( 11:02:16 )
> Fetch (0x7f000000.0x1.0x1) [2] ( 11:02:48 )
> progress::fetching () 0x ( 11:02:48 )
> connection::unreachable myserver.domain.se ( 11:03:08 )

Looks like the rpc2 traffic goes fine, but the sftp is blocked. This
commonly happens with masquerading firewalls. We have got 4 types of
udp traffic and we see the following behaviour if the client is inside
of the firewall:

- The rpc2 requests from client:2430 to server:2432, normally work well.
- Client to server data transfers, client:2431 to server:2433, works
  fine as well.
- Server callbacks from server:2432 back to the client, sometimes happen to
  work because the client just punched a nice hole which is valid for
  about 5 minutes. (Backprobes are therefore done every 4 minutes ;)
- Server to client data transfers, server:2433 to client:2431. Most of
  the time doesn't work at all.

Jan