Hi,

I have SUSE 9, and I am trying to connect to UNIX network.
Here is procedure that I type:

xhost +
telnet remotemachine
setenv DISPLAY IPadress:0.0

But when I try to start any application on remote machine I get error
Error: Cannot open connection to window server: 159.107.78.39:0.0

This started to happen when I switch from regular modem connection to ISDN connection.

Any idea how to fix this.
Thx.
Petar

Do you have any firewall rules blocking port 6000?
iptables -Ln

I receive this printout????

iptables: Table does not exist (do you need to insmod?)

Well it looks like you don't have a firewall running. Have you asked your ISP if there are any blocks on ports to your machine?

No I have not. But it is not a real ISP, I am trying to connect to may station at work. I was able to do that before with modem, and I spoke to a fried he can still connect, but for some reason I can't do that any more. Now I am using ISDN????

by
Petar

My bad. If I type iptables -L I get this printout

linux:~ # iptables -L
Chain INPUT (policy DROP)
target prot opt source destination
ACCEPT all -- anywhere anywhere
ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED
ACCEPT udp -- anywhere 255.255.255.255 udp spt:bootps dpt:bootpc
ACCEPT icmp -- anywhere anywhere icmp echo-request
ACCEPT udp -- ns2.al.sw.ericsson.se anywhere state NEW udp spt:domain dpts:1024:65535
ACCEPT udp -- ns1.al.sw.ericsson.se anywhere state NEW udp spt:domain dpts:1024:65535
input_ext all -- anywhere anywhere
input_ext all -- anywhere anywhere
ACCEPT all -- anywhere anywhere

Chain FORWARD (policy DROP)
target prot opt source destination
reject_func all -- anywhere anywhere
reject_func all -- anywhere anywhere

Chain OUTPUT (policy ACCEPT)
target prot opt source destination
ACCEPT all -- anywhere anywhere state NEW,RELATED,ESTABLISHED

Chain input_ext (2 references)
target prot opt source destination
reject_func tcp -- anywhere anywhere tcp dpt:ident flags:SYN,RST,ACK/SYN
LOG tcp -- anywhere anywhere tcp flags:SYN,RST,ACK/SYN LOG level warning tcp-options ip-options prefix `SuSE-FW-DROP-NEW-CONNECT '
reject_func all -- anywhere anywhere

Chain reject_func (4 references)
target prot opt source destination
REJECT tcp -- anywhere anywhere reject-with tcp-reset
REJECT udp -- anywhere anywhere reject-with icmp-port-unreachable
REJECT all -- anywhere anywhere reject-with icmp-proto-unreachable

Can this help a bit.

Thx.
Petar

That makes more sense. Your default input policy is "DROP" so most connections are dropped. Try adding a rule like:
iptables -A INPUT -s ip.of.other.machine -p tcp --dport 6000 -j ACCEPT

Then try agan.