Hello, I have a problem with my Red Hat 9 server. I have setup the firewall to allow incoming traffic on ports: 80, 22, and 25. For webserver, ssh, and ftp. My server is not firewalled other than with its own rules, it is simply connected to the internet via a Cisco Catalyst 3500.
However, most of the time the webserver, ssh, and ftp work fine, but sometimes, I cannot reach anything. At these times it won't even accept a ping.
I am using a VA Linux server, and I was originally using the built-in LAN card, I thought that it might have been a source for the problem, so I replaced it with a known working LAN card. Yesterday, it was up for a good 8-12 hours with no problems, but no I cannot access it today.
It is really frustrating. I'm using Apache, sshd, and vsftp for my server. my ip for the server is 18.104.22.168 feel free to check it out and see what you come up with, any help would be appreciated.
Here are a few suggestions that I have received, but have not tried. I read somewhere that my network card might be setup to autonegotiate, and might be bringing the eth0 up and down because it is negotiating itself offline. ?? If I restart my server it will work fine, but restarting it 3 times a day isn't really what I'm looking for in a solution.
Also, I have access to the 3500 if there are certain configuration issues I might need to address, but a lot of the time, my server works fine.
This is my first post, so feel free to help out with any info. I will try to add more info as anyone needs it. Thanks.