Linuxulator & UDP & PowerWare LanSafe III

Daniel O'Connor doconnor at
Thu May 26 03:55:41 PDT 2005

On Thu, 26 May 2005 18:34, Igor Robul wrote:
> They use UDP for communications.
> If I try connect to ls3 (daemon) which is running on FreeBSD 5.4-STABLE,
> then I get message about timeout from client part (ls3con).
> I see UDP packets from client to server with tcpdump on lo0 interface
> (with local client) or on fxp0 interface with remote client. But server
> start responding after 30-50 seconds. ls3con does not see server
> responses and gives error message about timeout. With command line
> client it IS possible sometime connect to server if I start client after
> error message, and if client uses same local UDP port as before, then it
> gets _previous_ server response. Then they estabilish TCP connection and
> all works OK.
> With FreeBSD 4.X there are no any timeouts, server responds fast enought
> for client to see response. To be sure I have tried this with
> server in remote office, which I have not upgraded yet.

I can't really suggest anything except for compating version of linux_base you 
are using. It may be worth ktrace'ing the server (use the linux_kdump port to 
interpret the result)

Also perhaps you should consider trying to use NUT with the UPS (since it's 
open source)

Daniel O'Connor software and network engineer
for Genesis Software -
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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