Gentoo Archives: gentoo-user

From: Grant <emailgrant@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] WAN->laptop1->router->laptop2 : no laptop1<->router communication
Date: Sun, 15 Mar 2009 05:19:45
Message-Id: 49bf44f10903142219k64be52c1x11aa9b7ac2c1765d@mail.gmail.com
In Reply to: Re: [gentoo-user] WAN->laptop1->router->laptop2 : no laptop1<->router communication by Florian Philipp
1 >> My laptop is connected to a distant wireless signal with a strong
2 >> antenna and I'd like to create a local wireless LAN using the distant
3 >> wireless signal as the WAN.  The layout would look something like
4 >> this:
5 >>
6 >> WAN->(wireless)->laptop1->(ethernet)->router->(wireless)->laptop2
7 >>
8 >> My travel router is wireless, has a LAN port, and can operate in
9 >> Router, Client, or AP mode.  I think AP mode is what I want.  laptop2
10 >> can ping the router, but it can't ping laptop1.  laptop1 can't ping
11 >> the router.  I don't know what my communication problem is between the
12 >> router and laptop1.  Here is my eth0 config for laptop1:
13 >>
14 >> config_eth0=( "192.168.0.1 netmask 255.255.255.0 broadcast 192.168.0.255" )
15 >>
16 >> The travel router is in AP mode and configured like this:
17 >>
18 >> IP: 192.168.0.30
19 >> Subnet Mask: 255.255.255.0
20 >> Gateway: 192.168.0.1
21 >>
22 >> I have dnsmasq and shorewall on laptop1 for DNS and NAT, but I can't
23 >> use those until I get laptop1 talking to the router.  Does anyone see
24 >> what I'm doing wrong?
25 >>
26 >> - Grant
27 >>
28 >
29 > Is it possible that you need different subnets for your AP's wired and
30 > wireless connection?
31
32 I tried with the WAN on ppp0 instead of wlan0 and it worked!
33
34 The only iffy thing is I manually specify the eth0 gateway IP to match
35 the gateway IP for ppp0 which was DHCPed by wvdial. Is there a way to
36 make that more dynamic so I don't have to match the eth0 gateway IP
37 and the DHCPed ppp0 gateway IP?
38
39 Here are my configs:
40
41 laptop1 eth0 (managed by wicd)
42 IP: 192.168.0.1
43 Netmask: 255.255.255.0
44 Gateway: the.ppp0.gateway.ip
45 DNS: the.ppp0.gateway.ip
46
47 router/AP device
48 IP: 192.168.0.30
49 Netmask: 255.255.255.0
50 Gateway: 192.168.0.1
51
52 laptop2 wlan0 (managed by wicd)
53 IP: 192.168.0.31
54 Netmask: 255.255.255.0
55 Gateway: 192.168.0.1
56 DNS: 192.168.0.1
57
58 As Dan mentioned in the previous thread, should I be able to use a
59 wireless network interface instead of the router/AP device?
60
61 - Grant