network_configuration

Network Configuration

I am using DHCP and I have been assigned up an IP but I can't get out on the Internet.
On the LTC 1000 with wireless card, the wizard does not come up immediately when first installed, why?
Can I use a PCMCIA wireless NIC with my LTC-400?
Customer has two routers on the same network and he wants to be able to use a different router as the gateway for his terminal at different times.
How do I configure the wireless network card on my LTC thin client?
Installed the Cisco Aironet 350 on my LTC unit running the 2.6 kernel and there is no place to configure it.
How do I set up a secure SSH connection to an AS/400 from outside a VPN using a linux thin client?
LTCs with Trendnet PCI and Cisco PCMCIA (WEP or no WEP) adapters cannot connect.
Do the Linux thin clients support LEAP?

I am using DHCP and I have been assigned an IP but I can't get out on the Internet.

You may have enable DNS checked in the advanced parameters of the network tab of the terminal properties. Uncheck and the thin client will use the DNS information from the DHCP server.

On the LTC 1000 with wireless card, the wizard does not come up immediately when first installed, why?

This is normal, it does come up after about one minute. This lag is to allows the system to recognize the Wireless Card and not ask for the license.

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Can I use a PCMCIA wireless NIC with my LTC-400?

You can only use a USB wireless card with the LTC-400 as it does not have a PCMCIA slot.

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Customer has two routers on the same network and he wants to be able to use a different router as the gateway for his terminal at different times.

The attached image shows the command to do this.

(example)

route add default gw 192.168.3.30 eth0 ; define the new route
route del default gw 192.168.3.1 ; delete the old one

or do get rid of it and use default
route del default gw 192.168.3.30 eth0 ; get rid of new one
route add default gw 192.168.3.1 eth0 ; add new one

To make icons to run this procedure, go to a shell and

1. cat "route add default gw <ip addr> eth0" >/tmp/config/files/newroute

2. chmod 777 /tmp/config/files/newroute

3. cat "route del default gw <ip addr> eth0" >/tmp/config/files/oldroute

4. chmod 777 /tmp/config/files/oldroute

5. freeze

This creates two scripts newroute and oldroute and saves them to flash.

Next use a telnet connection with '-iconic -e /tmp/config/files/newroute for ip 127.0.0.1.

When double clicked, this will add the new router as the default.

Do the same for /tmp/config/files/oldroute.

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How do I configure the wireless network card on my LTC thin client?

Wireless network configuration options will not appear until the wireless network card is installed and detected in the thin client.

Go to Start/Settings/Control Panel

Select Network Tab in Terminal Properties.

Select Wireless Parameters

Complete the wireless network information - select OK, unit should reboot to wireless network connection.

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Installed the Cisco Aironet 350 on my LTC unit running the 2.6 kernel and there is no place to configure it.

Starting with the 2.6 kernel, the Cisco Aironet is no longer supported - the newer Cisco card that supports A, B and G is supported and that card would be detected and the software would show the wireless network setup.

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How do I set up a secure SSH connection to an AS/400 from outside a VPN using a linux thin client?

To do this the user needs an SSH server running on the firewall into his VPN. There are several ways to setup a secure connection as described below.

1. Define a Putty connection to the firewall using SSH. On the Tunnels tab of the Putty SSH configuration define a new forwarded port. For 5250 the source port could be anything (23, 2023, etc.).

For the destination specify the address of the AS400 and port 23.

(ie - 192.168.0.150:23). Then click the Add button to add this port forwarding.

For the 5250 connection the IP address should be 127.0.0.1 and the port is what you specified as the source port above.

Auto start the Putty session - before you can start the 5250 session YOU MUST LOGIN to the SSH server using the putty session. Once you have logged in you can start the 5250 session and it is now secure.

2. Define a dummy telnet connection to address 127.0.0.1. Then on the Options line put :

-e ssh -Nf -L localport:IP address of AS400:dest port -l <user name> <IP address of ssh server>

the <user name> is the user to login to the SSH server as the ports are the same as described above. Again you need to login to the SSH server before you can launch the 5250 session.

The settings for the 5250 connection are the same as in 1.

3. Make a script "user_startup" and put in /tmp/config/files and "freeze".

This script should start the ssh port forwarding using the same ssh command as in 1. ie -

ssh -Nf -L localport:IP address of AS400:dest port -l <user name> <IP address of ssh server>

Note that this can also be used to setup secure RDP connections (only the port needs to change).