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Date: Sat, 19 Aug 2000 22:42:13 +0200 (CEST)
From: Jimmy Olgeni <olgeni@uli.it>
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Subject: Star Office, linux emulation and tun0 interface
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Hello all,

I have this StarOffice 5.2 up and running, it works fine under linux
emulation (4.1-STABLE). With its built in "web browser" I can connect
to localhost (I have a small apache server) and to any computer on the
network (http, smtp and pop3) via the ed0 interface.

Trouble is, it won't work with the tun0 interface (userland ppp). If I try
to connect to any host over the Internet via tun0, it won't do anything. It
asks the named on localhost, gets and answer, then nothing. It times out
after a while.

Tcpdump says:

A.A.A.A -> my bsd box
B.B.B.B -> pop3 server

22:22:09.512530 A.A.A.A.3488 > B.B.B.B.110: S 3959876255:3959876255(0) win 16384 <mss 1460,nop,wscale 0,nop,nop,timestamp 3792940 0> (DF)
22:22:09.628771 A.A.A.A.3488 > B.B.B.B.110: . ack 2945610326 win 17376 <nop,nop,timestamp 3792952 140768641> (DF)
22:22:10.118659 A.A.A.A.3488 > B.B.B.B.110: . ack 42 win 17335 <nop,nop,timestamp 3793001 140768679> (DF)

*** nothing happens, I press the "stop" button

22:22:30.450273 A.A.A.A.3488 > B.B.B.B.110: F 0:0(0) ack 42 win 17335 <nop,nop,timestamp 3795034 140768679> (DF)
22:22:30.568883 A.A.A.A.3488 > B.B.B.B.110: . ack 43 win 17334 <nop,nop,timestamp 3795046 140770734> (DF)


Normal (native) fetchmail session:


22:27:11.459356 A.A.A.A.3494 > B.B.B.B.110: S 4017566534:4017566534(0) win 16384 <mss 1460,nop,wscale 0,nop,nop,timestamp 3823134 0> (DF)
22:27:11.561321 A.A.A.A.3494 > B.B.B.B.110: . ack 3269700569 win 17376 <nop,nop,timestamp 3823145 140798834> (DF)
22:27:11.691458 A.A.A.A.3494 > B.B.B.B.110: P 0:13(13) ack 42 win 17376 <nop,nop,timestamp 3823158 140798846> (DF)
22:27:11.811305 A.A.A.A.3494 > B.B.B.B.110: P 13:28(15) ack 83 win 17376 <nop,nop,timestamp 3823170 140798858> (DF)
22:27:12.151152 A.A.A.A.3494 > B.B.B.B.110: . ack 113 win 17376 <nop,nop,timestamp 3823204 140798883> (DF)
22:27:15.062066 A.A.A.A.3494 > B.B.B.B.110: P 28:34(6) ack 113 win 17376 <nop,nop,timestamp 3823495 140798883> (DF)
22:27:15.212745 A.A.A.A.3494 > B.B.B.B.110: P 34:40(6) ack 122 win 17376 <nop,nop,timestamp 3823510 140799196> (DF)
22:27:15.321496 A.A.A.A.3494 > B.B.B.B.110: F 40:40(0) ack 136 win 17376 <nop,nop,timestamp 3823521 140799210> (DF)
22:27:15.328986 A.A.A.A.3494 > B.B.B.B.110: F 40:40(0) ack 137 win 17376 <nop,nop,timestamp 3823521 140799210> (DF)

Native FreeBSD applications all work, with the same hosts and
protocols (netscape, fetchmail, postfix). I even disabled the local
firewall (ipfw based) but nothing changed.

StarOffice works only through the squid proxy (http only, of course).

Could there be a problem with linux emulation and userland ppp? Is it
a known Star Office bug? Why could tun0 be different? How can I debug
this? Sorry, I don't have any other linux application to test...


bye,
  jimmy





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