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From: chops@kestrel.ugrd.und.ac.za (Ewan McPhail)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Hassles with Slip (well described, not a newbie)
Date: 6 Oct 1995 07:21:57 GMT
Organization: University of Natal (Durban), South Africa
Lines: 77
Message-ID: <452lel$pjn@owl.und.ac.za>
NNTP-Posting-Host: kestrel.ugrd.und.ac.za
Summary: Can't go outside the slip host
Keywords: slip sliplogin
X-Newsreader: TIN [version 1.2 PL2]
Okay, I've been reading this group for some time looking at all the
"help me with Slip" messages, and in particular the "help me I can't
get out of my slip host" ones. I have exactly this hassle - and a few
other questions.
I'd _really_ appreciate it if anyone who could shed some light on the
situation...
I'm dialling in using Trumpet Winsock for Win3.1. I can connect to the
FreeBSD machine below's modem, and start slip using "sliplogin <myname>" -
I can then telnet/ftp to the FreeBSD machine, but NOWHERE ELSE.
Here are the bit's and pieces I use (FreeBSD 2.0-Release) :
The FreeBSD machine's Ip is 146.230.224.19
The Ip address we have had reserved for slip is 146.230.224.9
/etc/netstart (in this order)
route add default 146.230.224.1 #the router on this subnet.
ifconfig sl0 inet 146.230.224.19 146.230.224.9 netmask 0xffffff00
sysctl -w net.inet.ip.forwarding=1
/etc/sliphome/slip.hosts
<username> 146.230.224.19 146.230.224.9 0xffffff00 autocomp
"ifconfig sl0" reports the following :
sl0: flags=d010<POINTOPOINT,LINK0,LINK2,MULTICAST> mtu 552
inet 146.230.224.19 -> 146.230.224.9 netmask 0xffffff00 (all ok there?)
"sysctl net.inet.ip.forwarding" returns "net.inet.ip.forwarding = 1". (ok too?)
I know that "146.230.224.1" is the correct router on this net, since
that's the first place shown by every traceroute from FreeBSD box.
/etc/host.conf has "bind" before "hosts", and i've tried reversing the order..
I am logging all the parameters passed to /etc/sliphome/slip.login, and
get the following from a login :
<username> attached @ 19200 via sl0, 146.230.224.19 -> 146.230.224.9,
mask 0xffffff00
Do I need to have anything specific in /etc/networks? /etc/resolv.conf?
When i've connected and turned on IP packet tracing on the Windows machine,
I see packets going to the nameserver 146.230.128.7, but no reply reaches
the windows box (146.230.224.9 -> 146.230.128.7, size=x just repeats).
The same happens if i specify the ip address of any remote site, no reply
from the remote site (so either I'm not sending anything, or I'm not getting
anything) [ttyd0 is the serial line, if that helps anything]
Trumpet Winsock claims I don't need to enter the default gateway and
netmask for slip connections, but I have anyway to be sure.
(btw, what should the default gateway's addr be, the FreeBSD box, or
gateway on the subnet?)
Now for the second part :
I'm presuming ALL I need to exec is /sbin/sliplogin <username>, I don't
need any daemons running? Any kernel options needed?
As far as I can see, "startslip" dials up a remote slip server and connects
(another unix box) - not what I want. And I don't need to run "slattach"
either, do I? (it has a redial option, and I want to dial IN, not out).
(i've tried running "slattach", no go either :(
The man page for "sliplogin" notes that "only the superuser may attach a
network interface" - I'm presuming this is why "sliplogin" is setuid root.
You'll really make my month if you can help me out here!
Thanks in advance!
-Ewan
---
_______
| _____|wan McPhail - Computer Science undergrad at UND, South Africa.
| |___ mcphail@beastie.cs.und.ac.za (SysAdmin and WebMaster)
| ___| <URL:http://kestrel.ugrd.und.ac.za/~chops/>
| |_____ Try my experimental, homebrewed mailserver!
|_______| Mail mcphail@beastie with the subject line "request-help".