[olug] Proxy & Linux

[David Walker]

I am curious what kind of "proxy problem" you are having.

To determine if there is a proxy between you and the internet, find a
machine on the internet that is not running a web server on port 80 and,
from inside your network, open a telnet or netcat connection to port 80
of that machine.  If you get a connection, then there is a proxy between
you and that server.  If you do not get a connection, then there
probably is not a proxy in there.

Craig Wolf wrote:
> Output of command:
> # iptables -t nat -L
> FATAL: Could not load /lib/modules/2.6.22.17-0.1-default/modules.dep: No such file or directory
> iptables v1.3.8: can't initialize iptables table `nat': Table does not exist (do you need to insmod?)
> Perhaps iptables or your kernel needs to be upgraded.
>
> /etc/sysconfig/iptables does not exist and /etc/sysconfig/proxy is not enabled...
>
> Good items to check...still not sold that the server is NOT my proxy problem.  8(
>
> Craig Wolf
> Linux Server Support
> Backups Administrator
> Desktop/Network Specialist
> Desk: (402)715-6283
> Cell: (402)510-0301
>
>
>   
>>>> Kevin <sharpestmarble at gmail.com> 3/18/2009 >>>
>>>>         
> You could either run iptables as you did, but check the nat
> table(Server:~ # iptables -t nat -L) or check what's in
> /etc/sysconfig/iptables. Anything in either of those would bear
> looking into.
>
> On Wed, Mar 18, 2009 at 11:23, Craig Wolf <CJWolf at mpsomaha.org> wrote:
>   
>> If I am using a Linux server as a Router and I want to verify that there is no "hidden" proxy redirects on that server for the people that use it.  Would I look at the iptables?
>> BTW.  iptables output is:
>> Server:~ # iptables -L
>> Chain INPUT (policy ACCEPT)
>> target     prot opt source               destination
>>
>> Chain FORWARD (policy ACCEPT)
>> target     prot opt source               destination
>>
>> Chain OUTPUT (policy ACCEPT)
>> target     prot opt source               destination
>>
>> Any ideas where else to look??
>>
>> Craig Wolf
>> Linux Server Support
>> Backups Administrator
>> Desktop/Network Specialist
>> Desk: (402)715-6283
>> Cell: (402)510-0301
>>
>>
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>>     
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