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Hello all! This is my first time posting, and I would like to add that simply by reading this forum, many of my questions have been answered! Great forum!
But this time I have a different question. I set up a box with RedHat 9 on it to run as a httpd/ftp/ssh/mail server. Everything works great from within my local network. But as soon as I try to access any of those from outside my local network, I cannot get in. I have used the "setup" command, and changed the firewall settings to none, since I am behind a different firewall, and have also opened up the appropiate ports on the perimiter firewall.
One note is that I am using the ods.org DNS service, and I have changed the hostname on this Linux box to match that of my ods.org name.
Any ideas on what might be causing a problem here?
I am not at the system now, so I will have to wait until I get home to try that out.
But isnt it weird that everything works fine from within the local network, but as soon as you go outside of that nothing works? I have tested the port forwarding on the external firewall as well and everything works fine with that box.
I was reading about the /etc/hosts file in another thread here where someone messed up their apache by changing the host name. Could this possibly cause the same experience as me, just multiplied by 3 for ssh, ftp, and http?
Again, I want to express thanks for your help (mainly ppuru).
So this is saying that the "router system" (which is directly attached to the internet) is not allowing traffic to go through?
And I would do 'tcpdump host <ip of external host>' which would give the traffic between the system connected directly to the internet and the client? I am beginning to get confused as to what systems we are talking about right now.
Let's use names, the RedHat box is the system in question, then you have the "HP" which is the gateway for the internet (connected directly), and you also have the client. This will help me clear some things up.
So basically, I want to do 'tcpdump host <ip of hp's external IP>' correct? We are doing this because the RedHat box is not even recieving traffic?
My setup is:
Client2- - Client
Internet ------ HPMachine (WinXP) ---- RHServer
In which the HPMachine is running Windows XP's port forwarding. And I have opend up the ports via the Windows XP machine to allow traffic in.
I did some more research, and I get a "Page Cannot be Displayed" error from within the local network, but I cannot ping, or get any response from the RHServer from outside the local network (ie Client 2). This is really puzzling me, as it seems that more and more pieces are being added then twisted around!?
Well if webnoelle2.ods.org website is hosted on one of those machines a guess the good news is it's reachable by others, me at least from the outside as is ftp.
Not sure about changing the hostname because if above is true it isn't stopping me connecting, know diddly about XP port forwading or firewall, maybe it s stopping external connections that originate from the same IP as itself, (yup I'm guessing )