Date: Tue, 10 Mar 1998 20:07:35 +0100 From: Marco Masotti <masotti@mclink.it> To: Steve Hovey <shovey@buffnet.net> Cc: questions@FreeBSD.ORG Subject: Re: Ping works in one direction only Message-ID: <35058F77.41C6@mclink.it> References: <Pine.BSI.3.95.980310091553.9888P-100000@buffnet11.buffnet.net>
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Steve Hovey wrote:
>
> You need to give more details, like what the defaults are - what the class
> Cs are - kind of spell it out. You are probably correct, that its the
> routing
>
> On Tue, 10 Mar 1998, Marco Masotti wrote:
>
> > I've set up a FBSD 2.2.5-REL machine acting as a dial-up ppp router
> > between two private networks.
> >
> > My problem is that I can ping in one direction only: I can ping from any
> > host on Network A to any host on Network B, but I can't do the reverse,
> > even between the same pair of machines that A-to-B works: there is no
> > answer from the machine being ping'd the other way.
> >
> > I suspect a problem in the gateway path, but I can't figure what might
> > be.
Hello,
here below the details:
------- ------- -------
| |IRIS-ppp0 dview-ppp0 | | | |
| |-----++++++++++++-------| | | |
| | | | | |
------- ------- -------
|IRIS dview | multipass |
| | |
|---------|
|-----------------------------------------------------|
IRIS-ppp0 180.1.1.2
dview-ppp0 180.1.1.1
IRIS 199.1.1.5
dview 196.1.129.176
multipass 196.1.129.160
All netmasks are default. Machines dview and IRIS have both forwarding
enable.
IRIS, dview and multipass don't run routed. All machines are FBSD
2.2.5-REL, except IRIS is Irix 6.3
multipass CAN ping to dview and to IRIS.
IRIS CANNOT ping to multipass but it CAN ping to dview and to
dview-ppp0.
It happens that packets are not able to pass over dview-ppp0. Traceroute
reveals that the packets stop at the dview-ppp0 interface.
IRIS 9% netstat -r
Routing tables
Internet:
Destination Gateway Netmask Flags Refs Use
Interface
localhost localhost UH 15 382
lo0
dview-ppp0 180.1.1.2 UH 0 358
ppp0
180.1.1.2 localhost UH 0 0
lo0
196.1.129 dview-ppp0 0xffffff00 UGS 3 1788
ppp0
199.1.1 IRIS 0xffffff00 U 2 52
ec0
IRIS localhost UGHS 0 0
lo0
224 IRIS 0xf0000000 U 2 75
ec0
dview# netstat -r
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif
Expire
localhost.mclink.i localhost.mclink.i UH 1 2 lo0
180.1.1.2 dview-ppp0 UH 4 1903 ppp0
192.168.100 maggiordomo-le1 UGSc 2 0 ep0
196.1.129 link#2 UC 0 0
maggiordomo-le1 8:0:20:20:e4:26 UHLW 5 12307
ep0 581
multipass 0:a0:c9:43:a1:17 UHLW 3 789
ep0 464
dview localhost.mclink.i UGHS 1 26 lo0
199.1.1 180.1.1.2 UGSc 0 10 ppp0
224/4 link#2 UCS 0 0
multipass# netstat -r
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif
Expire
localhost.my.domai localhost.my.domai UH 0 6 lo0
192.168.100 196.1.129.55 UGSc 0 547 fxp0
196.1.129 link#1 UC 0 0
196.1.129.55 link#1 UHLW 1 38
multipass 0:a0:c9:43:a1:17 UHLW 0 656 lo0
dview 0:20:af:1e:13:cc UHLW 2 1648
fxp0 931
199.1.1 dview UGSc 0 155 fxp0
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