Cannot access wired lan clients from wifi client

J_Szucs · 10-02-2009, 10:19 AM

A lame question: why cannot I access (or even ping) the router's lan ip address, or computers on wired lan from my notebook connected to the router via wi-fi?

It looks like as if the wired lan clients and the wifi lan clients would be completely separated by the router, whilst I triple checked and could not find any related configuration option on the admin interface of the router.

router: tplink tl-wr340g
notebook client: suse 11.1 (uses wpa-psk to connect to the router)
wired lan clients: suse 11.0 and suse 10.1 (the eth0 interfaces of both are configured as external interfaces, and sshd listens on each, ssh can connect to any of them from wired lan)

fpmurphy · 10-02-2009, 10:56 AM

Check your network mask. Are you on a different subnet from the wired devices?

J_Szucs · 10-02-2009, 11:57 AM

No. Network mask is 255.255.255.0.
Router lan ip is 192.168.0.1.
Clients on wired network use static ips below 192.168.0.10, and clients on wifi network use dhcp over 192.168.0.100.

Anyway, now I am starting to doubt whether my wifi network has any security: WPA2-PSK and AES are configured on the router, but:
iwlist wlan0 encryption
wlan0 2 key sizes : 40, 104bits
4 keys available :
[1]: off
[2]: B3E5-FE71-7B8F-63BA-B55E-E452-1DC0-BA07 (128 bits)
[3]: off
[4]: off
Current Transmit Key: [2]
Security mode

pen

What does "Security mode

pen" mean? Would access to lan be disabled by the router because the wlan network is open?

J_Szucs · 10-06-2009, 12:50 PM

In the meantime I could configure WPA2-PSK and made sure it works.

However, the solution is quite different: I have to manually bring down the eth0 "wired interface" each time I use wlan. Eth0 and wlan0 have different ips in the lan network address range, and it seems this caused some problems.

I wonder why the router cannot be configured to have separate wlan and wired lan networks, to avoid such problems, instead of having a single lan network comprising both...

tredegar · 10-06-2009, 02:04 PM

You will run into problems if you are trying to have two connections to your router (wired and wireless) at the same time. Use either one or the other.

If you want to use both at the same time, you have a bit of searching to do... .. .