Re: Xstart Problem with Linksys Router
From: Martin, Paul (
)
Date: Fri May 17 2002 - 10:41:51 EDT
what's the command to do the forward?
-----Original Message-----
From: Tim McDonough [mailto:
]
Sent: Thursday, May 16, 2002 4:12 PM
To:
Subject: Re: Xstart Problem with Linksys Router
You must forward port 6000 to the ip address of the machine running the
x-windows server.
T
-----Original Message-----
From: Title: ExceedUsers [mailto:
] On Behalf
Of Hong G. Im
Sent: Wednesday, May 15, 2002 2:04 PM
To:
Subject: [EXCEEDUSERS] Xstart Problem with Linksys Router
I see similar questions asked on this usergroup, but couldn't find the
answer.
I'm using Exceed v6.2 at home on a WinXP machine connected to a cable
modem via Linksys wireless router (BEFW11S4 V.2). Without the router,
everything works so I know that it's not the problem with WinXP or the
cable modem. With the Linksys router, however, the X-window never shows
up on Xstart. Xstart only works with the "Terminal Emulator" mode but
I'd like to use it in the "X Window" mode. I understand that it's
related to the firewall issue, and in fact I got some suggestions from
the Linksys tech support (see appended message below).
Following Linksys instruction below, I have tried the IP address
192.168.1.100 and port number 23 (telnet) in the port forwarding
setting. I have also tried the DMZ host which should open up the port
regardless of the port forwarding. I even tried to disable DHCP and set
up static IP as 192.168.1.100 under both port forwarding and DMZ host
options. Unfortunately, none of these worked for me. Was there
something wrong in the IP address or the port number? How do I properly
set up the static IP address if necessary? If anyone figured out the
solution to this problem, I'd very much appreciate hearing about it.
Thank you.
Hong
====================================================
The following is the response I got from the Linksys tech support:
Thank you for contacting Linksys Customer Support.
The router has a built-in firewall, which prevents outside users from
accessing your internal network. Because of this, you have to open ports
in order to use online applications.The router's Port Forwarding feature
allows users from the Internet to access certain services on the
internal network behind the router without compromising your security.
When you want to use this application, first find out their service port
numbers.In your case find out the ports used by Exceed
To specify a server behind the firewall and forward the necessary ports,
kindly follow these simple steps:
1. Go to http://192.168.1.1, and input the password for the router
2. Go to the "Advanced" tab> "Forwarding"
3. Enter the Static IP address of the computer
4. Specify the service port nubmer
5. Choose Both for protocols.
6. Click "Apply" and "Continue".
Lastly, in order for your router to successfully trigger ports, the SPI
feature of the router should be disabled. This feature checks the state
of a packet to verify that the destination IP address matches the source
IP of the original request. SPI opens the ports as needed as long as the
data transfer session originates from a LAN side computer. Think of SPI
as "Dynamic Port Forwarding".
The SPI option is an experimental feature. If you enable SPI, it will
DISABLE THE FORWARDING FEATURE. SPI looks at each packet a little more
in depth than just normal routing.2 It checks where the packet is going
and where it is from and remembers this info for the future. If a packet
comes to your door that has the right routing information, a normal NAT
might just pass the packet on regardless. However, an SPI firewall might
say, 'Hey, wait a minute, this packet is from somewhere that I haven't
visited lately, its unsolicited, so I'm just going to ignore it.'
The SPI option can be found in the router's Filters Page :
http://192.168.1.1/Filters.htm ; under the Advance tab of the router's
web utility page.
If the above procedure does not work, then I would advise you to use the
DMZ host feature. The DMZ Host setting allows one local user to be
exposed to the Internet to use a special-purpose service such as online
gaming, audio/video-conferencing, application hosting, etc. DMZ hosting
allows 1 PC to be exposed to outsiders. This means that this PC will not
have any firewall protection simply because the computer which is
specified at this tab is placed outside the router's firewall. It is as
if you are bypassing the router and directly connecting your computer
to the modem. This feature can be found at the DMZ Host tab under the
Advanced tab of the router's web utility page. The computer you are
intendng to place outside the firewall should have a static IP address
below that of the IP range of the DHCP server of the router. This IP
address should be specified at the said tab.
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: Fri May 31 2002 - 23:54:01 EDT
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