I have a system of monitoring cameras.

It runs normal with 2 cameras, with the third tied it starts to crash, if I try to turn on the fourth, it crashes the server.

I am using CentOS with KDE and VNC has some limit stream tcp connections? I've tried disabling iptables but nothing changed.

What exactly crashes? An application? Your Desktop Environment?


Via what interface are the cameras connected? Are they all the same brand and type? (And which one BTW?) Do they require proprietary drivers?
What do the system logs show when you plug the cameras in? And right before the crash? And what does the crash look like in the logs?
Please be as verbose as possible and please post log excerpts in [code]text here[/code] tags or pastebin them if too large.

Let me try to explain myself better ...

I have a program to access the cameras, supports up to 64 devices, cameras, this program is provided by the manufacturer of the cameras.

The cameras are a factory located in germany, I rented a vps, so that the company's founders could access from anywhere without overwhelming the small server germany.

The settings on my vps is:
CentOS 5.8 + VNC + KDE.
Up to 8 processors of 3.5GHz.
Guaranteed 8gb memory can reach up 16gb.
Link 100mbps, I realized that the actual speed of 10mbps.

The application opens the cameras can usually keep up to 3 cameras rolling simultaneously, but when I try to connect the fourth camera it crashes my vps, as if there was a limit of connections tcp / stream simultaneous in VPS.

I wonder how can I break this limit? which file I have to change to be able to access more than three cameras simultaneously on my vps?

I'm sorry but I've asked you very specific questions and you answered one and in a way that does not help me help you. Try harder.


You focus on network connections and say "as if" without providing anything that would support that. If it were a VPS network connection limit then you should
enquire if it were a network connection limit imposed by the VPS hoster, list network-related sysctls and syslog messages (if any), your network device and firewall configuration and output from monitoring network connections before, during and after each camera gets connected.

What is the interface used to connect? USB? SCSI? IDE? MFM?

Germany is in the network.

I access the VPS U.S., the ip address of the server from germany.

In U.S. VPS:

Home System Monitoring> Open all cameras ip (xxx.xxx.xxx.xxx for the server from germany).

If I use the same program in any program for windows platform, it can open all cameras normally. Vps now, I can only open 3 cameras.

Just to remind the access DVR cameras are IP (across the network).

There's nothing that connects them together to a computer, unless the network.

The VPS is independent of the U.S. from Germany.

I asked for specific information two times. All I got back was vague enough to be unhelpful. And I'm not about to ask thrice.

The device is connected by network cable.

And what does the crash look like in the system logs? Please be as verbose as possible and please post log excerpts in tags or pastebin them if too large. If it were a VPS network connection limit then you should enquire if it were a network connection limit imposed by the VPS hoster. Also list network-related sysctls and syslog messages (if any), your network device and firewall configuration and output from monitoring network connections before, during and after the application connects to the DVR cameras over IP. Please let us know if you face a language barrier, have reading disability, don't know anything about Linux, if you're incapable of running anything from the command line or whatever else because my ESP is at an all time low and I can not guess what it is that keeps you from posting the information we need to help you.