Date: Fri, 23 Feb 1996 21:28:02 +0100 From: Angelo Turetta <ATuretta@stylo.it> To: freebsd-hackers <freebsd-hackers@freebsd.org> Subject: IP Aliasing: a little confused Message-ID: <c=IT%a=_%p=Regulus%l=SERVERNT960223212801AU005B00@servernt.stylo.it>
next in thread | raw e-mail | index | archive | help
This message is in MIME format. Since your mail reader does not understand
this format, some or all of this message may not be legible. Contact your
mail administrator for information about upgrading your reader to a version
that supports MIME.
------ =_NextPart_000_01BB0235.D1135D10
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
I hope someone can make it more clear.
My Internet router is running 2.0.5R: its NE2000 is assigned the IP =
194.21.207.254 out of my class "C" network.
I've other PCs 'Internet enabled' on the same network, and a PPP =
connection via V34 leased line to my Internet provider.
On the same physical LAN, I've setup an internal IP network using one of =
the class "C" reserved for internal use by the RFCxxxx (sorry I don't =
have the RFC number handy :-( 192.168.1.x
In rc.local, I've added:
ifconfig ed1 alias 192.168.1.254 netmask 0xffffff00
ifconfig ed1 alias 194.20.21.28 netmask 0xfffffff0
(the second is for temporarily keeping the old IP addresses I used to =
have before requesting a class "C")
After boot, my routing table is:
Internet:
Destination Gateway Flags Refs Use Netif =
Expire
default 194.20.20.37 UGc 25 9 tun0
127.0.0.1 127.0.0.1 UH 2 73 lo0
192.168.1 link#1 UC 0 0
194.20.20.37 194.21.207.250 UH 16 0 tun0
194.20.21.16 link#1 UC 0 0
194.21.207 link#1 UC 0 0
194.21.207.254 127.0.0.1 UGHS 0 0 lo0
224 link#1 UCS 0 0
Now, weirdness # 1: when the router must tell its address to the =
ethernet, it always uses the one from the lowest numbered network, and =
not from the same network as the source address: that is, when I =
traceroute a PC on the internal network from one on the Internet =
network, I get:
E:\>tracert www.regulus.it
Tracing route to segreteria.regulus.it [192.168.1.1]
over a maximum of 30 hops:
1 <10 ms <10 ms 10 ms unix.regulus.it [192.168.1.254]
2 10 ms 10 ms 10 ms segreteria.regulus.it [192.168.1.1]
And the same happens for packets going through the ppp link.
E:\>tracert www.dsnet.it
Tracing route to maggiore.dsnet.it [194.20.20.15]
over a maximum of 30 hops:
1 <10 ms <10 ms 10 ms unix.regulus.it [192.168.1.254]
2 150 ms 150 ms 160 ms mazzini.dsnet.it [194.20.20.37]
3 160 ms 170 ms 171 ms maggiore.dsnet.it [194.20.20.15]
Is this normal ?????
I'd think if a fixed address must be used, it should be the 'TRUE' one, =
not one of the aliases.
Weirdness # 2 (worst than first): one of the PCs on the 'Internet' =
subnet has a dial-up connection to another site. There, the IP addresses =
are taken from another RFCxxxx reserved network: 10.0.0.0 netmask =
255.0.0.0. My side of the link is on the machine at 194.21.207.13.
when I issue this command:
# route add -net 10 194.21.207.13
the new route becomes:
Destination Gateway Flags Refs Use Netif =
Expire
10 194.21.207.13 UGSc 0 0 tun0
You may see the Netif value is wrong, as it routes packets for the new =
net to the 'default' interface, rather than the interface through which =
the gateway is reacheable. Obviously, packets sent to 10.x.x.x are lost.
Is there any way to work around this problem ?
Thanks in advance for any help.
Angelo.
-----------------------------------------------------------------
Angelo Turetta mailto:aturetta@stylo.it
Stylo Multimedia - Bologna - Italy http://www.stylo.it/
------ =_NextPart_000_01BB0235.D1135D10
Content-Type: application/ms-tnef
Content-Transfer-Encoding: base64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------ =_NextPart_000_01BB0235.D1135D10--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?c=IT%a=_%p=Regulus%l=SERVERNT960223212801AU005B00>