What is the output of:

lspci -k | grep Eth -A 3

uname -r

[root@comune ~]# lspci -k | grep Eth -A 3
04:01.0 Ethernet controller: D-Link System Inc RTL8139 Ethernet (rev 10)
Subsystem: D-Link System Inc DFE-538TX 10/100 Ethernet Adapter
Kernel driver in use: 8139too
Kernel modules: 8139too
04:02.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8100/8101L/8139 PCI Fast Ethernet Adapter (rev 10)
Subsystem: Realtek Semiconductor Co., Ltd. RTL-8100/8101L/8139 PCI Fast Ethernet Adapter
Kernel driver in use: 8139too
Kernel modules: 8139too, 8139cp
04:04.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8110SC/8169SC Gigabit Ethernet (rev 10)
Subsystem: Biostar Microtech Int'l Corp Device 2304
Kernel driver in use: r8169
Kernel modules: r8169
04:05.0 Ethernet controller: D-Link System Inc RTL8139 Ethernet (rev 10)
Subsystem: D-Link System Inc DFE-538TX 10/100 Ethernet Adapter
Kernel driver in use: 8139too
Kernel modules: 8139too


[root@comune ~]# uname -r
2.6.32-504.23.4.v6.x86_64

You did not say you had 4 NICs! How are they configured:

ifconfig | grep eth -A 1

cat /etc/clearos/network.conf

The NIC drivers are OK.

[root@comune ~]# ifconfig | grep eth -A 1
eth1 Link encap:Ethernet HWaddr 00:11:95:65:19:27
inet addr:192.168.1.25 Bcast:192.168.1.255 Mask:255.255.255.0
--
eth2 Link encap:Ethernet HWaddr 00:E0:4D:51:E8:FF
inet addr:192.168.50.2 Bcast:192.168.50.255 Mask:255.255.255.0


[root@comune ~]# cat /etc/clearos/network.conf
# Network mode
MODE="gateway"

# Network interface roles
EXTIF="eth1"
LANIF="eth2"
DMZIF=""
HOTIF=""

# Domain and Internet Hostname
DEFAULT_DOMAIN="pinco.pallino.to.it"
INTERNET_HOSTNAME="proxy.pinco.pallino.to.it"

# Extra LANS
EXTRALANS=""

I had expected a NIC driver but there is not one so I am not sure where to go now and I don't think I can do much more. The proxy should not touch pings but can be the cause of browsing slowdowns. What is the system load when the internet slows? Look at the command "top". Is there anything with a particularly high load? Does clearing the proxy cache help?

I would also try configuring the other two NIC's as LAN NIC's on other LAN subnets just to rule that out.

I tried to stop squid and table on the internal network card becomes normal (1ms). I think it's squid that slows down: the processor is in fact under 6% load.


I tried to put the two network adapters with LAN profile (always in gateway mode) and it works the same whether navigation mail but you can not go out with rdp connections on the Internet. How is it possible?

[root@comune postfix]# ifconfig | grep eth -A 1
eth1 Link encap:Ethernet HWaddr 00:11:95:65:19:27
inet addr:192.168.1.25 Bcast:192.168.1.255 Mask:255.255.255.0
--
eth2 Link encap:Ethernet HWaddr 00:E0:4D:51:E8:FF
inet addr:192.168.50.2 Bcast:192.168.50.255 Mask:255.255.255.0
[root@comune postfix]# cat /etc/clearos/network.conf
# Network mode
MODE="gateway"

# Network interface roles
EXTIF=""
LANIF="eth1 eth2"
DMZIF=""
HOTIF=""

# Domain and Internet Hostname
DEFAULT_DOMAIN="pinco.pallino.to.it"
INTERNET_HOSTNAME="proxy.pinco.pallino.to.it"

# Extra LANS
EXTRALANS=""

I don't understand why rdp won't work with 2 NIC's. It is not logical.

With the proxy, I can't help you as I don't know it. There are quite a few threads on the forum, if you search.