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From: Paul Weber <weber@ee.cornell.edu>
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Please Help! with routing and slip
Date: Thu, 25 Jan 1996 14:36:39 -0500
Organization: Cornell University
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I have ipforwarding turned on and I have arp compiled into the kernel. What we
are trying to do is have five static slip ip numbers and use proxyarp to do the
routing for the five numbers. Also, we are using gated. Slip seems to semi work
we can connect to our pop server some of the time, which is on our local
128.84.239 net, but we can not connect to any WWW servers or ftp sites that are
not on our local net using slip. We always get a domain name lookup failure
making it impossible to connect to outside sources. Many times after doing a
domain name lookup packets are no longer being forwarded to the slip interface.
I have also tried to point to several different name servers and I still get DNS
failures.
We are using FreeBSD 2.0 and our slip.login looks like this :
#!/bin/sh -
#
# @(#)slip.login 5.1 (Berkeley) 7/1/90
#
# generic login file for a slip line. sliplogin invokes this with
# the parameters:
# 1 2 3 4 5 6 7-n
# slipunit ttyspeed loginname local-addr remote-addr mask opt-args
#
/sbin/ifconfig sl$1 inet $4 $5 netmask $6 mtu 1500 arp
# Answer ARP requests for the SLIP client with our Ethernet addr
/usr/sbin/arp -s $5 00:61:8c:11:23:aa pub
We have done a route add 128.84.239.187 128.84.239.188 on our slip server.
128.84.239.187 is a slip client and 128.84.239.188 is the slip server and
gateway.
Our gated.conf looks like this:
#
#
# tracing options
#
traceoptions "/var/tmp/gated.output" replace size 100k files 2 general ;
rip yes {
interface sl noripout noripin ;
interface ie0 ripin ripout version 1 ;
traceoptions route ;
} ;
#
# Turn on a bunch of tracing info for the interface to the kernel:
kernel {
traceoptions remnants request routes info interface ;
} ;
#
# Propagate the route to xxx.xxx.yy out the Ethernet interface via RIP
#
export proto rip interface ie0 {
proto direct {
128.84.239 mask 255.255.255.0 metric 1; # SLIP connections
} ;
} ;
#
# Accept routes from RIP via ed Ethernet interfaces
import proto rip interface ie0 {
all ;
} ;
I have also tried using routed -s with about the same results.
I have tried to ping our slip server from the slip client and it seems to work.
However sometimes after sending 20+ packets the packets no longer get returned to
the client. It is like things just stop working. If I ping our main gateway (
128.84.239.1 ) to the Internet from the client packets go out but they never get
returned to the client.
I just can't seem to figure it out. We are so close to having it work and I'm
not sure what we could be missing to make it work. Any ideas are very much
appreciated.
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~ Paul R. Weber ~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~ Computer Operations Manager II ~
~ 301 Phillips Hall ~
~ Electrical Engineering ~
~ Cornell University ~
~ Ithaca, NY 14853-6401 ~
~ ~
~ E-mail: prw1@cornell.edu ~
~ Phone: (607) 255-1460 ~
~ Fax: (607) 254-4565 ~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~