Date: Sun, 3 Mar 2002 09:37:27 -0500 (EST) From: Stephen Krauth <stephenk@stephenk.com> To: freebsd-questions@freebsd.org Subject: laptop refusing incoming network connections Message-ID: <20020303085912.H3053-100000@charon.inside.killermartian.com>
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I can browse/ssh/ftp/ping anything FROM my laptop, but from another
machine (call it the desktop) I cannot ssh/ftp/ping TO the laptop.
I'm not running ipfw on the laptop, though the desktop, which is
acting as a NAT router, is running ipfw in the 'open' configuration.
But I've also tried using ping and ssh (ie. putty) on some Windows
boxes around with the same result: no response. One more symptom: in
order to ftp FROM the laptop, I have to use passive mode.
The strange thing is that I run tcpdump on the laptop while
pinging from the desktop, and I see the icmp echo requests. Same
thing trying to ssh/ftp/etc.
Ok, now here comes the spirit-crushing part: when I switch to this
$1.98 generic 10mbs nic I bought from CompUSA, I don't have this
problem; it works fine! But I want the 10/100 nic to work. Wah!
Thanks in advance for any ideas/assistance.
Steve K. U.F.O. - "For the feeler gauge in you."
Details:
- laptop using generic 10/100 pccard nic
- laptop is configured via dhcp server on the desktop
- laptop is 10.0.10.128
- desktop is 10.0.10.1
ifconfig:
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
inet 127.0.0.1 netmask 0xff000000
ed1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 10.0.10.128 netmask 0xffffff00 broadcast 10.0.10.255
ether ??:??:??:??:??:?? <- paranoia made me blank these
netstat -rn:
Internet:
Destination Gateway Flags Refs Use Netif
Expire
default 10.0.10.1 UGSc 0 0 ed1
10.0.10/24 link#2 UC 0 0 ed1 =>
127.0.0.1 127.0.0.1 UH 0 2067 lo0
uname -a:
FreeBSD charon 4.3-RELEASE FreeBSD 4.3-RELEASE #2: Sun Dec 16 23:22:10
EST 2001 stephenk@charon:/usr/src/sys/compile/CHARON i386
tcpdump -ni ed1:
(ping)
09:18:36.479892 10.0.10.1 > 10.0.10.128: icmp: echo request
09:18:37.489784 10.0.10.1 > 10.0.10.128: icmp: echo request
09:18:38.499730 10.0.10.1 > 10.0.10.128: icmp: echo request
09:18:39.509688 10.0.10.1 > 10.0.10.128: icmp: echo request
(ssh)
09:22:06.638936 10.0.10.1.1062 > 10.0.10.128.22: S
1733648778:1733648778(0) win 16384 <mss 1460> (DF)
09:22:09.629997 10.0.10.1.1062 > 10.0.10.128.22: S
1733648778:1733648778(0) win 16384 <mss 1460> (DF)
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