Re: Snort Inline mode with iptables problems on Ubuntu 12.04

[Shivaramakrishnan Vaidyanathan <shivaramakrishnan740 () gmail com>]

Hi,
I have installed the latest version of snort  and want to run in inline
mode and I have been having problems in accessing the machine once I change
the iptables entries.I am able to start the snort with no issues.But as
soon as I change the iptables, I am no longer able to access it.Here is the
iptables commands that I use.

iptables -A INPUT -i lo -s 127.0.0.1 -d 127.0.0.1 -j ACCEPT
iptables -A OUTPUT -o lo -s 127.0.0.1 -d 127.0.0.1 -j ACCEPT
iptables -A INPUT -j QUEUE
iptables -A FORWARD -j QUEUE
iptables -A OUTPUT -j QUEUE

snort -Q --daq afpacket --daq-mode inline -i eth0:eth1 - u snort -g snort -c
/etc/snort/snort.conf


Snort version : 2.9.6.0
daq version : 2.0.2

If I try to run snort with daq mode in ipq or nfq, I get daq module not
found.Though I see those modules built.
Build AFPacket DAQ module :Yes
Build IPFW DAQ module :Yes
Build IPQ DAQ module :Yes
Build NFQ DAQ module :Yes
Build PCAP DAQ module : Yes

(I believe I don't have to install extra modules for ip_queue on ubuntu
12.04).Please let me know what I am doing wrong here?Any suggestions is
greatly appreciated.


On Wed, Mar 19, 2014 at 3:17 PM, Shiva <shivaramakrishnan740 () gmail com>wrote:

> Hi,
> I have installed the latest version of snort in inline mode and I have
> been having problems in accessing the machine once I change the iptables
> entries.I am able to start the snort with no issues.But as soon as I change
> the iptables, I am no longer able to access it.Here is the iptables
> commands that I use.
>
> iptables -A INPUT -i lo -s 127.0.0.1 -d 127.0.0.1 -j ACCEPT
> iptables -A OUTPUT -o lo -s 127.0.0.1 -d 127.0.0.1 -j ACCEPT
> iptables -A INPUT -j QUEUE
> iptables -A FORWARD -j QUEUE
> iptables -A OUTPUT -j QUEUE
>
> snort -Q --daq afpacket --daq-mode inline -i eth0:eth1 - u snort -g snort -c
> /etc/snort/snort.conf
>
> (I believe I don't have to install extra modules for ip_queue on ubuntu
> 12.04).Please let me know what I am doing wrong here?Any suggestions is
> greatly appreciated.
>
> --
> Shiva
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