Re: [squid-users] 802.1Q and SQUID : bug ! Don't use them together

From: PINEAU Olivier <olivier.pineau@dont-contact.us>
Date: Thu, 22 Jan 2004 10:56:31 +0100

> On Wed, 21 Jan 2004, PINEAU Olivier wrote:
>
> > By despair, I change my network conf to use a different networdk card
for
> > each VLAN and it's finally works.
> > So, don't use 8021Q module with SQUID !
>
> Are you sure your network card supports 802.1Q? Not all Ethernet cards
> support the larger frame sizes required for 802.1Q operation. 802.1Q adds
> an additional VLAN header to the frames making them bigger than the
> maximum Ethernet frame size.
>
> Regards
> Henrik
>

I'm sure : I use 3COM 905 CX-TX-M.
Module 8021Q.o was load.

Here was my configuration for which Squid works fine except logging in some
websites :
    insmod /lib/modules/2.4.21-0.26mdk/kernel/net/8021q/8021q.o
    vconfig add eth0 1
    vconfig add eth0 2
    ifconfig eth0.1 10.10.10.1 netmask 255.255.0.0 up
    ifconfig eth0.2 10.20.10.1 netmask 255.255.0.0 up
    ifconfig eth0 10.0.0.30 netmask 255.254.0 up
    route add default gw 10.0.0.1

    iptables -t nat -F
    iptables -t filter -F
    iptables -t nat -P PREROUTING DROP
    iptables -t nat -A PREROUTING -p tcp --dport 110 -j ACCEPT
    iptables -t nat -A PREROUTING -p tcp --dport 3128 -j ACCEPT
    iptables -t nat -A PREROUTING -d 194.2.0.20 -j ACCEPT
    iptables -t nat -A PREROUTING -d 194.2.0.50 -j ACCEPT
    iptables -t nat -A POSTROUTING -j MASQUERADE
    squid start

This line could see strange :
    ifconfig eth0 10.0.0.30 netmask 255.2540.0 up
But, if I use this configuration :
    ifconfig eth0 0.0.0.0 up
    vconfig add eth0 3
    ifconfig ifconfig eth0.3 10.0.0.30 netmask 255.252.0.0 up
Squid doesn't deserve request in acceptable time (maybe 10 minutes) and no
idea the reason...

Olivier
Received on Thu Jan 22 2004 - 02:57:56 MST

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