Squid selecting slower internet connection

dmode · 12-04-2008, 03:11 AM

Hi,

I have two internet connections on my server:

eth1 - ASDL - dynamic ip - fast
eth2 - FR - fixed ip - slow

The prob is that when the server restarts the faster connection is used and after some time the connection is dropped to the slower one?!? Seems that the whole server switches to the slower internet connection.

Where should I configure squid.conf to use exclusively the faster connection?

Thanks!

GlennsPref · 12-04-2008, 08:28 PM

Hi and welcome to LQ

I think what you need to do is done in iptables.

By naming the interfaces, int_if ext_if etcetera (etc).

iptables snippet...

Code:

# Environment variables, change these values accordingly

	EXT_IF=ppp0
	INT_IF=eth0  #(you might add or change these)
	INT_NET=192.168.0.0/24


..........(heaps of lines omitted for clarity)
#
## -- Transparent proxy to Squid --- ##
#

	$IPTABLES -t nat -A PREROUTING -i $INT_IF -p tcp --dport 80 -j REDIRECT --to-port 3128

This way squid just keeps working, and the firewall does the traffic directions.

dmode · 12-04-2008, 10:27 PM

I already have added the same thing in iptables (see line 2):

iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 80 -j DNAT --to $eth0:3128
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3128

eth0 - LAN
eth1 - ADSL - $eth0
eth2 - FR

Question: I've got this config from a forum, what's the use of the first line? Can I remove it?

Thanks!

dmode · 12-04-2008, 10:52 PM

Hey hang on! Nowhere in your code the source is clearly defined?!?

I mean in my case connectivity should be:

eth1-> squid (tranparent) -> eth0

Help!

GlennsPref · 12-05-2008, 03:00 AM

Use the # key to remark or comment out a line of code, it's easier to
change it than delete it. Any line starting with a # wont be read.

The device eth0 must exist using the same name.

Quote:

eth0 - LAN

this will be the input to squid proxy cache.

iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3128

ppp0 is my modem and where the proxy accesses the web.

Code:

(My computer and Home-Net)-> eth0 ->
                              |      -> firewall -> ppp0 -> www
                            squid ->

So this gateway (eth0 and ppp0) uses the proxy cache as well as any computers connected to my home network(eth0).

Hope this helps.