iMac does not connect to WLAN (Siemens SE515)

Question

Level 1

35 points

iMac does not connect to WLAN (Siemens SE515)

Hello,

I own a Siemens Gigaset SE 515 (ADSl-Modem), which works perfectly well with my iBook. Additionally I use
AirTunes on my stereo. Last week I bought a new iMac G5 and tried to connect it to my existing network. First
I "opened" my WLAN and the router and the iMac show my they are connected. But when I try to access a
website, I get an error message, that no connection can be established.

More than that after this my iBook can't connect either, only after a restart of modem AND iBook.

Can anyone help me get my iMac connected?

Thanks in advance,

Heiner

iMac G5, Mac OS X (10.4.3), DSL Router: Siemens SE515

Posted on Nov 21, 2005 1:42 AM

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Answer 1

iFelix

Level 8

35,155 points

Nov 21, 2005 1:54 AM in response to Heiner Seidl

Are you using MAC address access control?

iFelix

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Answer 2

Heiner Seidl Author

Level 1

35 points

Nov 21, 2005 2:15 AM in response to iFelix

Usually I do, but I have deactivated it for the moment to
enable my iMac connecting to my WLAN.

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Answer 3

iFelix

Level 8

35,155 points

Nov 21, 2005 4:14 AM in response to Heiner Seidl

Is it a 802.11b or g wireless router?

To see if it is a security issue, turn off all security (temporarily) and see if you can now connect.

iFelix

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Answer 4

Heiner Seidl Author

Level 1

35 points

Nov 21, 2005 4:30 AM in response to iFelix

That was what I did and I could not connect. I could
even not connect, when I used a LAN-cable. Might that be
an incompatibility of the iMac with a very popular router?

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Answer 5

iFelix

Level 8

35,155 points

Nov 21, 2005 12:29 PM in response to Heiner Seidl

No I doubt it is an incompatability issue.

When connected by LAN does the iMac have ava|id IP address?

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Answer 6

Heiner Seidl Author

Level 1

35 points

Nov 21, 2005 2:40 PM in response to iFelix

In the list of computers connected to the WLAN, I see the
MAC adresses of the iBook AND the iMac, both with valid ip-adresses. In the AirPort configuration of both computers
I see the same AirPort ID.

So the iMac and the router definitely "see" each other and
the iMac says "connected to WLAN" and "internet connection established", only the internet doesn't work ....

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Answer 7

Heiner Seidl Author

Level 1

35 points

Nov 23, 2005 3:12 PM in response to Heiner Seidl

The solution of the problem is:

Type an IP address of a DNS server in the network configuration.
For German users: You don't want to use the T-Online DNS, it
does not know info.apple.com.
My computer works fine with 134.60.1.111 (from my alma mater :-))

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