lost wan connectivity when copying files

archtoad6 · 06-14-2007, 09:50 AM

A list of your steps w/ comments & Q's, please jump on anything incorrect.

ifconfig ra0 192.168.1.90
ra0 is what I have been calling "wlan0".
You are giving it a static IP.
Is the WRT53G a DHCP server & is .90 outside the IP range it serves from?
ifconfig eth0 172.28.201.3
You already had the BEFSR41 running 172.28.201.0 on its LAN ("PC") ports.
ifconfig eth1 192.168.8.1
You used my arbitrary 192.168.8.0 for the new 2-node network w/ static IP.
An appropriate config. setting was made for the WAN port on the BEFSR41.
route add -net default gw 192.168.1.1 netmask 0.0.0.0 metric 1
The WRT53G is 192.168.1.1 (as I suspected )
sysctl -p
Would the contents of /etc/sysctl.conf give any insight?
iptables -t nat -A POSTROUTING -o ra0 -j MASQUERADE
This NAT's the house net to your personal LAN.
Makes me wonder if we shouldn't explore an iptables solution to this.
dhcpd eth0

This I don't understand -- it appears to serve DHCP to your LAN, but isn't BEFSR41 already doing that? Did you mean dhcpd eth1, which would serve DHCP to the WAN port on the BEFSR41? Or did you mean
dhcpcd or perhaps dhclient?

Here's my revised diagram after all:

Code:

                     \    /
                      \  /  ~ ~ ~ ~ ~ ~ \
   (      )        +--------+            \  +-------------+
 (   'Net   ) ==== | WRT54G |             \ |   "Slack"   |
   (      )        +--------+              \| ra0 < wlan0 |
                   192.168.1.0/24           | .           |
                                            | . dedicated |
    \    /                                  | . internal  |
     \  /                                   | . route     |
  +--------+      +---------+ 192.168.8.0/? | .           |
  | WPN802 |      | BEFSR41 | ============= | eth1 (new)  |
  +--------+      +---------+               |             |
        |___________| | | |_________________| eth0        |
                      | |                   |             |
                  172.28.201.0/?            +-------------+

And a table of networks:

Code:

Network    DHCP
#  Name   Server   IP 
-  -----  -------  ---------------
1  House  WRT54G   192.168.1.0/24
2  LAN    BEFSR41  172.28.201.0/?
3  link   static   192.168.8.0/?

Please correct all my mistakes & bad assumptions.

starmonche · 06-14-2007, 10:23 AM

#1 yes, my wifi card is now ra0 instead of wlan0 (since i started using the rt2500 tool i found on serialmonkey)

#3 i set my (befsr41) router's default gateway to 192.168.8.1 and am using the dns servers assigned by dhcp to the wrt54g

#5 /etc/sysctl.conf has (only) this:
net.ipv4.ip_forward = 1

#6 this is probably the source of my problems. i'm not sure how to fine-tune it so that all internet traffic stays between ra0 and eth1.

#7 dhcp is disabled on my router (befsr41) because my slack box runs a dhcp server (my router doesn't let me specify which IPs go to which machine). the slack box assigns IPs in the 172.28.201.x range.

it looks like you have my whole setup figured out correctly.

i still have internet access on my 172.28.201.x machines if i disconnect eth0 (and assign the "testing" machine a static ip). but all that tells me is that the router WAN port is indeed working correctly. internet could still somehow be traversing through eth0 by default when it's connected and choke my internet connection.

does that make sense?

if i'd been able to bridge ra0 and eth1 then my slack box wouldn't have had internet access (unless i tweaked it) and if i can pull that off then i think wan and lan traffic will finally have been separated.

starmonche · 06-19-2007, 01:33 PM

I've started a new thread with this as "Internet & File Sharing (Advanced)"

archtoad6 · 06-19-2007, 05:33 PM

Where?

Why?

starmonche · 06-20-2007, 07:10 PM

I posted it as "Internet & File Sharing (Advanced)" in the hopes that cutting right to the problem might yield more solutions.

*Ugh* and I installed dropline gnome so I could run Firestarter and suddenly I have to add "172.28.201.3 cybertron" to the hosts files on my PCs so they can find it.