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 Linux setup ...
      I just configure a cable modem on my redhat 7.1 linux machine. I
was assigned a static ip address by my provider and I been able to
connect to internet by the web (web browsing) and by pinging site from
my machine. However, I cannot connect to my machine from the outside,
that is ftp , telnet, or http(have apache running on port 80). Can
someone tell me what files i need configure to allow outside/incoming
connection. I'll appreciate any input.


 Sat, 24 Apr 2004 00:46:36 GMT   
 Linux setup ...

- make sure your ISP allows incoming connections
- install wu-ftpd, telnetd and apache, and configure them
- set your firewall to allow incoming traffic (use "setup" or "lokkit")

        Markku Kolkka

 Sat, 24 Apr 2004 02:54:48 GMT   
 Linux setup ...
Some tips:

1) Not all ISP's provide continuous port 80 service. Here in British
Columbia, Canada, the major DSL ISP called Telus is intermittently blocking
port 80. They claim they need to do this to fight the Code Red Virus,
however Shaw Cable and Delta Cable don't do this. Further, when asked what
can be done about it they have responded "well ... if you upgrade to one of
our higher priced business packages, we don't block port 80". Get the drift?
In my opinion this is there way of saying "keep off port 80 unless you pay
us more money than we get from normal home DSL connections".

2) Donwload an excellent port-scanning utility called "nmap". I can't
recall, but I think you can get it as an RPM. In any case it works great.
Try scanning your Linux server across the web or from a locally connected
second machine. It will list for you all open ports. This verifies that you
really are listening on those ports. There is also a utility within Linux
that shows you what ports are open, but I can't recall what it is.

3) Install the "TCPDUMP" RPM. This utility comes on the Linux CD (at least
it does for Redhat) and dumps any activity on a specified interface (ie:
eth0, eth1, etc). You can also tell it to watch for only certain protocols.
For example:

tcpdump -i eth0        (dumps everything on eth0)
tcpdump -i eth0 tcp port 80     (dumps only packets containing port 80 that
travel through eth0)

Good luck,

Tom Edelbrok
Edelpro Consulting

 Sat, 24 Apr 2004 06:37:10 GMT   
   [ 3 post ] 

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