On Sunday 04 February 2007 18:37, J. Alfred Prufrock wrote:
> Darren Spruell wrote:
> > It's curious that the outside interface address on the cable modem
> > is showing up for any reason on the internal network.
>
> Right, this is what first puzzled me too.
Possibly a silly question -- how are you connecting the cable modem to your
OpenBSD server's external interface? Are they all plugged into a switch or
hub or are you using a cable from the external interface directly to the
cable modem?
>
> > You might use tcpdump or similar on your internal network to
> > determine what kind of traffic it relates to.
>
> tcpdump -vv -x -l results attached below.
>
> > Might help if you diagram it out, indicate IP addresses and subnets,
> > and so on.
>
> The setup right now:
> WAN <-->
> (WAN 24.aaa.bbb.ccc) SBG1000 cable-modem (LAN 192.168.0.1) <-->
> (dc0: 192.168.0.10) OpenBSD ("rock") (fxp0: 192.168.1.11) <-->
> other machines, phone, etc.
>
> I hope the diagram above is clear. Basically, the WAN talks to the
> SBG1000, which talks to the OpenBSD box, which talks to the inside
> machines. The two IPs on each box show inward and outward addresses.
> (I assume I shouldn't show my real IP or MAC addresses in public.)
> The entire setup works; it just gives me the following message:
>
> Feb 4 19:14:03 rock /bsd: arplookup: unable to enter address for
> 24.aaa.bbb.ccc
>
> The SBG1000 does NAT and runs a DHCP server. I tried turning those
> off so that the OpenBSD box would get its IP address directly from
> the ISP's server, but that didn't fix the problem: I still got the
> same arptables message, but with a different IP address.
>
> I just ran tcpdump; here's the line at which I get the
> error/warning/log message:
>
> 19:14:03.562039 arp who-has rock tell 24.aaa.bbb.ccc
> [Note: 24.aaa.bbb.ccc is the cable-modem box's WAN address.]
> 0001 0800 0604 0001 000b 06bc 7b0e 1891
> 8674 0000 0000 0000 c0a8 000a 1102 1fdc
> c0a8 6401 008a 00bb 0000 2046 4445
> 19:14:03.562118 arp reply rock is-at 00:11:22:33:44:55
> [Note: 00:11:22:33:44:55 is the OpenBSD box's outward-facing NIC's MAC
> address.]
> 0001 0800 0604 0002 0020 781f 00af c0a8
> 000a 000b 06bc 7b0e 1891 8674 1102 1fdc
> c0a8 6401 008a 00bb 0000 2046 4445
>
> Thanks for trying to help, guys.
>
> J
>
>
> !DSPAM:1,45c689a494861220213263!
--
Vijay Sankar
ForeTell Technologies Limited
59 Flamingo Avenue, Winnipeg, MB, Canada R3J 0X6
Phone: +1 (204) 885-9535, E-Mail: [EMAIL PROTECTED]
