Connect to internal lan using PPP

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Date: Wed, 26 Nov 2003 02:20:58 +1100
To: freebsd-questions@FreeBSD.ORG

Hi all,

I've set up my freebsd box to accept incoming connections via userPPP as
per the handbook using mgetty and autoPPP.

It's currently the default gateway for an internal lan and I'd like to
enable dial in users to access both network and internet services. It's
IP 192.168.1.1.

It is dual homed with 2 net cards (plus a modem), one external for
internet cable, one internal for home and runs natd for the other local pc.

Everything works fine. Home network sharing, samba etc, even dial out.

PPP will accept an incoming connection and allow log on for a user on my
modem on ttyd0, assigning a dynamic IP address in the range between
192.168.1.100-199.

On the client side, usually WINDOWS 98 from a friends house, I cannot
see anything. No PC's in net neighbourhood, no internet, and i cannot
ping either of the PC's at home. There are entries in the hosts file
for both home clients.

If i do an IPCONFIG from the windows client, it will reply as:

IP Address: 192.168.1.199
S/N: 255.255.255.0
Default Gateway: 192.168.1.199

If i delete this route on the windows client (route delete 0.0.0.0) and
add the correct route (route add 0.0.0.0 192.168.1.1), it shows up under
IPCONFIG correctly as:

IP Address: 192.168.1.199
S/N: 255.255.255.0
default gateway: 192.168.1.1

but I still cannot view the home LAN.

I've changed ppp.conf and added a ppp.linkup, but when logging on
externally i cannot fix what seems to be a routing/gateway issue.

My config is pretty standard, but for reference please find it all below:

MY RC.CONF FILE:

gateway_enable="YES"
hostname="MATRIX-SERVER"
ifconfig_sis0="inet 192.168.1.1 netmask 255.255.255.0"
ifconfig_tl0="DHCP"
#defaultrouter="192.168.1.1"
router_enable="YES"
arpproxy_all="YES"
local_startup="/usr/local/etc/rc.d /etc"
inetd_enable="YES"
kern_securelevel_enable="NO"
linux_enable="YES"
lpd_enable="YES"
moused_enable="YES"
#moused_flags="-z 5"
moused_port="/dev/psm0"
moused_type="auto"
nfs_reserved_port_only="YES"
saver="fire"
blanktime="180"
sendmail_enable="NONE"
#sshd_enable="YES"
usbd_enable="YES"
firewall_enable="YES"
firewall_type="OPEN"
natd_enable="YES"
natd_flags="-f /etc/natd.conf"
nfs_server_enable="YES"
portmap_enable="YES"
nfs_client_enable="YES"

MY PPP.CONF FILE:

default:
  set log Phase Chat LCP IPCP CCP tun command
  ident user-ppp VERSION (built COMPILATIONDATE)

  # Ensure that "device" references the correct serial port
  # for your modem. (cuaa0 = COM1, cuaa1 = COM2)
  #
  set device /dev/cuaa0

  set speed 115200
  set dial "ABORT BUSY ABORT NO\\sCARRIER TIMEOUT 5 \
            \"\" AT OK-AT-OK ATE1Q0 OK \\dATDT\\T TIMEOUT 40 CONNECT"
  set timeout 0 # 3 minute idle timer (the default)
  enable dns # request DNS info (for resolv.conf)
  allow users matrix_admin pentium ppp courtobrien

pap:
  enable pap
  enable passwdauth
  set ifaddr 192.168.1.99 192.168.1.100-192.168.1.199 255.255.255.0
  #add 0.0.0.0 192.168.1.1
  accept dns
  set dns 203.2.75.132
  enable proxy

#cuaa0:
# set ifaddr 192.168.1.99 192.168.1.100-192.168.1.199 255.255.255.0
# add default MYADDR
# enable passwdauth
# allow users matrix_admin pentium courtobrien ppp
# accept dns
# set dns 203.2.75.132
# enable proxy

ttyd0:
  set ifaddr 192.168.1.99 192.168.1.100-192.168.1.199 255.255.255.0
  add 192.168.1.1
  enable passwdauth
  accept dns
  set dns 203.2.75.132
  enable proxy

optusnet:
  #
  # edit the next three lines and replace the items in caps with
  # the values which have been assigned by your ISP.
  #

  set phone 6666666666
  set authname username
  set authkey password

  set ifaddr 10.0.0.1/0 10.0.0.2/0 255.255.255.0 0.0.0.0
  add default HISADDR # Add a (sticky) default route

MY PPP.LINKUP FILE

MYADDR:
  delete ALL
  add 0 0 HISADDR

Going through the PPP.LOG, it seems to rely on the pap section of
PPP.CONF and I notice a error when the default route is being set.

WARNING: add route failed: 0.0.0.0/0 already exists.

It has to be something easy I've overlooked, but I'm spending all my
girlfriends money on phone calls!!!

Cheers,

DR

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