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Sudden Network Disconnection
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TOPIC: Sudden Network Disconnection
#43151
Sudden Network Disconnection 11 Months, 3 Weeks ago  
Hello all,
I am using clearos 5.2 enterprise edition.
I am using 4 port Network card and 1 inbuilt in my machine.
i have 3 internet connections and 1 LAN.
For recent days, my clearos LAN connection is suddenly disconnected and users are complaining about the unstable internet access.

i checked /var/log/messages.I can spot the below thing.

system clamd[6364]: /tmp/tfmMXIhg: Trojan.Agent-288331 FOUND

this is my lspci output:

12:04.0 Ethernet controller: D-Link System Inc DL10050 Sundance Ethernet (rev 15)
12:05.0 Ethernet controller: D-Link System Inc DL10050 Sundance Ethernet (rev 15)
12:06.0 Ethernet controller: D-Link System Inc DL10050 Sundance Ethernet (rev 15)
12:07.0 Ethernet controller: D-Link System Inc DL10050 Sundance Ethernet (rev 15)

i want to make my clearos firewall stable..please help me
sivabalan
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Posts: 32
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#43234
Re: Sudden Network Disconnection 11 Months, 3 Weeks ago  
Hello guys,

i have got little more understanding in clearos.
my problem was exactly same.
i have some internel web servers in my environment.
i am using 1-1 NAT to map the public ip of my isp with the local ip.
when i disable all the NATing, my network become damn fast.

i went through 1-1 NAT and port forwarding related topics in our forums.
www.clearfoundation.com/component/option.../func,view/id,27939/
As i understand Tim's 1st reply,
1-1 NAT is the suitable one for my atmosphere.because i am using many external ips to bind with different local ips.

i want reconfigure my NATing stuffs.
my question is simple any novel little experienced clearos users can answer.

Network ==========>Firewall==========>1-1NAT windows of the webconfig has two sections.
1.configure 1-1 NAT
2.Configure 1-1 NAT Port

in the 1st section, if i map a local ip to public ip, will all the inbound traffic with different ports to the particular machine is allowed? or only 80

in the second section,last field in the name of PORT denotes port range for particluar ip or from port to port.

right now i configured by assuming it as from port and to port..
sivabalan
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Posts: 32
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#43409
Re: Sudden Network Disconnection 11 Months, 2 Weeks ago  
I have really messed up things.
simply off the virus scanner in content filter window solved the whole problem.

can anybody tell me the impact of disabling virus scanner
sivabalan
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