Linux - NetworkingThis forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free.
I have a Fedora core 3, on which I have configured squid server. I have made this squid listen on port 3128. I am able to connect from my own PC on either 127.0.0.1 or 10.72.168.111 (my static ip address). But wondow machines on my LAN are not able to connec to my server.
Imcidently, I have also configured a caching only namer server.
Hello Mr. Masand,
Thanks for your response.
I have correctly configured the window machines' IE for proxy. But when I go through my logs (cache.log and access.log), I don't find any request from any other host. This is proved from the IE's window also whcih does not say anything from my server (like "Access Denied ...... Squid Server ..." etc). I feel that the request from foriegn host is not even reaching my squid server). I have rechecked the port number etc, and they are okay.
Yeah, I am 200% sure there is no firewall.
I have a nagging uncomfortable observation:
I configure my mozilla to access internet through proxy at 127.0.0.1. And I find that I can surt, and their are appropriate entries about requests from 127.0.0.1 in the log files.
Next I configure mozilla to access internet through proxy at 10.72.168.111 (my eth1). I find that I can surf only if eth1 is brought up. So far, okay. But when I go through log I find that surprisingly entries are about requests from 127.0.0.1. Then when I bring down lo, I find I cannot surf.
One more thing - do you thing for allowing my window machines I would need some sort of NTA in place ?
Finally, how do I go about wirh port scanning. I need a little guidance here, please.
Thanks a lot for everything.
Last edited by prabhatsoni; 01-22-2005 at 07:28 AM.
i have dome this many times so i cannot understand why is this is problem
if u say that u are not able to browse if eth1 goes down
thathappens if u have some type of service going on whcih monitors ur eth1 connection
this service is there in mandrake , but i haven't seen this in RH9.0
portdscan ur IP after it is up and down
for that there is this portscanner called nmap and the GUI on eis nmapfe
will do a simple port scanning
also try this proxy configration with some diferent browser in windows say dfirefox, maybe u have left something
also can u ping ur proxy m,achine from ur windows machine
as far as NAT is concerned that is an alternate solution
if u have proxy working then u do not need NAT for that
1). nmap 10.72.168.11 - > service squid-http on port 3128
2). I bring eth1 (10.72.168.111) down, and again give nmap 10.72.168.111 - > Surprisingly it still says "3128/tcp open squid-http". It should not listed in my opinion since eth1 is down !
3). nmap 127.0.0.1 -> Indicate the service squid-http is running on 3128.
4). I bring lo down, and give namp 10.72.168.111 - > Now it says network down and does not list any service. same is the case if I give nmap 127.0.0.1.
It gives an impression that lo and eth1 are same interfaces ! Is it true. ?
I can ping the server from window machines.
Since everything seems to be in order I will try to catch hold of some linux desktop in my network and ask him to access my proxy through mozilla - may be I am missing out something in windows' IE. Will keep you posted.