Just to make sure things are understood.
There is one big difference between windows and Linux handling connections and traffic.
Linux can accept traffic on a specific interface but route the outgoing packet via another interface.
It’s a feature of the Linux Routing and Networking Kernel stack.
Sometimes it can bite the admin/user and while on windows the connection(TCP) will always be routed or
put into the right cable in Linux you need a little be connection marking, mangling and routing marking to make sure that
the traffic will be passed to the right gateway.
It’s a bit hard to understand what happens currently on your system.
All The Bests,
Eliezer
----
Eliezer Croitoru
Linux System Administrator
Mobile: +972-5-28704261
Email: eliezer@xxxxxxxxxxxx
From: squid-users [mailto:squid-users-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of davidjesse091@xxxxxxx
Sent: Saturday, June 16, 2018 7:16 AM
To: rousskov@xxxxxxxxxxxxxxxxxxxxxxx; squid-users@xxxxxxxxxxxxxxxxxxxxx
Subject: Re: iptables setup for tcp_outgoing_address
I tried curl --interface 172.16.11.107 http://www.example.com yesterday and it worked fine, but now it looks like it does not work. Just hangs forever. So there is an issue there for sure. I will try to find out why it's not working.
-----Original Message-----
From: Alex Rousskov <rousskov@xxxxxxxxxxxxxxxxxxxxxxx>
To: davidjesse091 <davidjesse091@xxxxxxx>; squid-users <squid-users@xxxxxxxxxxxxxxxxxxxxx>
Sent: Fri, Jun 15, 2018 11:43 pm
Subject: Re: iptables setup for tcp_outgoing_address
On 06/15/2018 05:12 PM, davidjesse091@xxxxxxx wrote:
> if I use another interface's IP address
> for tcp_outgoing_address on my Linux machine then web pages don't load.
Does using "another interface" IP address work with curl or wget
executed on the Squid Linux box?
curl --interface 172.16.11.107 http://www.example.com
wget --bind-address=172.16.11.107 http://www.example.com
Alex.
> -----Original Message-----
> From: Alex Rousskov <rousskov@xxxxxxxxxxxxxxxxxxxxxxx>
> To: davidjesse091 <davidjesse091@xxxxxxx>; squid-users
> <squid-users@lists.squid-cache.org>
> Sent: Fri, Jun 15, 2018 7:01 pm
> Subject: Re: iptables setup for tcp_outgoing_address
>
> On 06/15/2018 04:42 PM, davidjesse091@xxxxxxx
> <mailto:davidjesse091@xxxxxxx> wrote:
>
>> I want to connect to Squid proxy using 192.168.1.212 and if I am
>> connecting using port 11000,
>
> I assume you meant "connecting to port 11000" (there is also the client
> source port, but it should not matter here).
>
>
>> I want squid to have the traffic go out of the 172.16.11.107 IP
>
>
>> http_port 11000 name=port_11000
>> acl port_11000_acl myportname port_11000
>> tcp_outgoing_address 172.16.11.107 port_11000_acl
>
> Looks good to me, provided all your outgoing traffic goes to IPv4
> addresses (no IPv6).
>
>
>> What would I need to do with iptables to make this work?
>
> Why do you think you need iptables? What does not work if you do not use
> IP tables?
>
>
> Alex.
