Re: Some weird issue with return traffic with redirect rule

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On Fri, Oct 17, 2008 at 10:19 AM, Grant Taylor
<gtaylor@xxxxxxxxxxxxxxxxx> wrote:
> On 10/17/08 01:30, Pranav Desai wrote:
>>
>> We are seeing cases where the return traffic is going out using the
>> proxyIP and port 8001, instead of using the origin servers IP and port 80. I
>> have added the traces for both cases below. Most of the traffic goes out
>> correctly using the origin server IP and port, but the traffic using port
>> 8001 is not insignificant, hence we are a bit concerned about it.
>
> *nod*
>
>> There are no connections coming in to port 8001.
>
> Ok...
>
> I have to ask, is there a reason you are not configuring clients to talk
> directly to the proxy?  In my experience this works a lot better than
> transparent proxying.  I tend to use direct proxying as the primary method
> and then transparent proxying as a backup and to catch devices that don't
> know how to talk to a proxy.
>

Too many clients will have to change their settings. Not feasible in our case.

>> I am not sure what could be causing this behavior or how I should go about
>> debugging this. Could the conntrack table or its usage be screwed up?
>
> Are there any DMESG or syslog entries about the connection table being full?
>

There is no info there, and the tables are not getting full. Here are
the conntrack settings.

net.ipv4.ip_conntrack_max = 1048576
net.ipv4.netfilter.ip_conntrack_buckets = 1048576
net.ipv4.netfilter.ip_conntrack_count = 63908
net.ipv4.netfilter.ip_conntrack_max = 1048576

-- Pranav

>
>
> Grant. . . .
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