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Date:      Fri, 17 May 2002 11:11:01 +0800
From:      "fred zhang timogen" <fred@timogen.com>
To:        <freebsd-questions@FreeBSD.ORG>
Subject:   FreeBSD gateway PPPOE and pop3 timesout
Message-ID:  <006801c1fd50$7cca5390$7d05a8c0@fred>

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Hi,

Can I ask you a question;


The machine behind the gateway can access the outside by ftp, httpd etc.
But they cannot receive mails from some mail servers by pop3.

When the tun0 is bring up by default, its mtu is set to 1500, at this =
time even in the gateway they cannot receive mails by fetchmail.
The username/password anth is passed, but the fetchmail hangs up while =
retriving mails, at last throw a timesout error.

But when the mtu of tun0 is set to 1492, they can retrives mails from =
the mailserver(see below), But they cannot retrive mails from the =
outlook express on windows behind the gateway.
The username/password anth is passed in outllook express, but it hangup =
while retriving mails, at last throw a timesout error(see below).

plus.

The OS is FREEBSD 5.0 DP-1

------------------Messages about fetchmails ------------------
Enter password for jerry@timogen.com@pop3.timogen.com:
3 messages for jerry@timogen.com at pop3.timogen.com (18332 octets).
reading message jerry@timogen.com@pop3.timogen.com:1 of 3 (10630 octets) =
.......... flushed
reading message jerry@timogen.com@pop3.timogen.com:2 of 3 (4636 octets) =
.... flushed
reading message jerry@timogen.com@pop3.timogen.com:3 of 3 (3066 octets) =
... flushed


------------------Error  of outlook express ------------------
A time-out occurred while communicating with the server. Account: =
'jerry.timogen.com', Server: 'pop3.timogen.com', Protocol: POP3, Port: =
110, Secure(SSL): No, Error Number: 0x800CCC19


------------------the ifconfig messages ------------------

rl0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet 0.0.0.0 netmask 0xffffff00 broadcast 0.0.0.255
        inet6 fe80::240:b8ff:fe50:3ab2%rl0 prefixlen 64 scopeid 0x1
        ether 00:40:b8:50:3a:b2
        media: Ethernet autoselect (none)
        status: active
rl1: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet 192.168.5.99 netmask 0xffffff00 broadcast 192.168.5.255
        inet6 fe80::240:b8ff:fe50:1860%rl1 prefixlen 64 scopeid 0x2
        ether 00:40:b8:50:18:60
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
lp0: flags=3D8810<POINTOPOINT,SIMPLEX,MULTICAST> mtu 1500
lo0: flags=3D8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
        inet6 ::1 prefixlen 128
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x4
        inet 127.0.0.1 netmask 0xff000000
ppp0: flags=3D8010<POINTOPOINT,MULTICAST> mtu 1500
tun0: flags=3D8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1492
        inet 61.170.151.96 --> 1.1.1.1 netmask 0xffffffff
        Opened by PID 163



Regards
Fred Zhang

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2600.0" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Hi,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Can I ask you a question;</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>The machine behind the gateway can =
access the=20
outside by ftp, httpd etc.<BR>But they cannot receive mails from some =
mail=20
servers by pop3.</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>When the tun0 is bring up by default, =
its mtu is=20
set to 1500, at this time even in the gateway they cannot receive mails =
by=20
fetchmail.<BR>The username/password anth is passed, but the fetchmail =
hangs up=20
while retriving mails, at last throw a timesout error.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>But when the mtu of tun0 is set to =
1492, they can=20
retrives mails from the mailserver(see below), But they cannot retrive =
mails=20
from the outlook express on windows behind the gateway.<BR>The =
username/password=20
anth is passed in outllook express, but it hangup while retriving mails, =
at last=20
throw a timesout error(see below).</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>plus.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>The OS is FREEBSD 5.0 DP-1</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>------------------Messages about =
fetchmails=20
------------------<BR>Enter password for <A=20
href=3D"mailto:jerry@timogen.com@pop3.timogen.com">jerry@timogen.com@pop3=
.timogen.com</A>:<BR>3=20
messages for <A href=3D"mailto:jerry@timogen.com">jerry@timogen.com</A> =
at=20
pop3.timogen.com (18332 octets).<BR>reading message <A=20
href=3D"mailto:jerry@timogen.com@pop3.timogen.com:1">jerry@timogen.com@po=
p3.timogen.com:1</A>=20
of 3 (10630 octets) .......... flushed<BR>reading message <A=20
href=3D"mailto:jerry@timogen.com@pop3.timogen.com:2">jerry@timogen.com@po=
p3.timogen.com:2</A>=20
of 3 (4636 octets) .... flushed<BR>reading message <A=20
href=3D"mailto:jerry@timogen.com@pop3.timogen.com:3">jerry@timogen.com@po=
p3.timogen.com:3</A>=20
of 3 (3066 octets) ... flushed</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV><FONT face=3DArial =
size=3D2>
<DIV><BR>------------------Error&nbsp; of outlook express=20
------------------<BR>A time-out occurred while communicating with the =
server.=20
Account: 'jerry.timogen.com', Server: 'pop3.timogen.com', Protocol: =
POP3, Port:=20
110, Secure(SSL): No, Error Number: 0x800CCC19</DIV>
<DIV>&nbsp;</DIV>
<DIV><BR>------------------the ifconfig messages =
------------------</DIV>
<DIV>&nbsp;</DIV>
<DIV>rl0: flags=3D8843&lt;UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST&gt; mtu =

1500<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; inet 0.0.0.0 netmask=20
0xffffff00 broadcast =
0.0.0.255<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
inet6 fe80::240:b8ff:fe50:3ab2%rl0 prefixlen 64 scopeid=20
0x1<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ether=20
00:40:b8:50:3a:b2<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; media: =
Ethernet=20
autoselect (none)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; status:=20
active<BR>rl1: =
flags=3D8843&lt;UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST&gt; mtu=20
1500<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; inet 192.168.5.99 =
netmask=20
0xffffff00 broadcast =
192.168.5.255<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
inet6 fe80::240:b8ff:fe50:1860%rl1 prefixlen 64 scopeid=20
0x2<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ether=20
00:40:b8:50:18:60<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; media: =
Ethernet=20
autoselect (100baseTX=20
&lt;full-duplex&gt;)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
status:=20
active<BR>lp0: flags=3D8810&lt;POINTOPOINT,SIMPLEX,MULTICAST&gt; mtu =
1500<BR>lo0:=20
flags=3D8049&lt;UP,LOOPBACK,RUNNING,MULTICAST&gt; mtu=20
16384<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; inet6 ::1 prefixlen=20
128<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; inet6 fe80::1%lo0 =
prefixlen 64=20
scopeid 0x4<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; inet 127.0.0.1 =
netmask=20
0xff000000<BR>ppp0: flags=3D8010&lt;POINTOPOINT,MULTICAST&gt; mtu =
1500<BR>tun0:=20
flags=3D8051&lt;UP,POINTOPOINT,RUNNING,MULTICAST&gt; mtu=20
1492<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; inet 61.170.151.96 =
--&gt;=20
1.1.1.1 netmask 0xffffffff<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
Opened=20
by PID 163</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Regards<BR>Fred =
Zhang</FONT></DIV></BODY></HTML>

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