Re: snort configuration

[Russ Combs <rcombs () sourcefire com>]

On Tue, Sep 3, 2013 at 12:44 PM, <rem239 () gmx de> wrote:

>  >Use
> > config ignore_ports
> > With giving port range
>
> config ignore_ports: tcp 1:21 23:79 81:65535
> config ignore_ports: udp 1:65535
>
> The snort manual says:
> Specifies ports to ignore (useful for ignoring noisy NFS traffic). Specify
> the protocol (TCP, UDP, IP, or ICMP), followed by a list of ports. Port
> ranges are supported.
>
> If I set IP as a protocol, snort says:
> FATAL ERROR: /etc/snort/snort.conf(154) Invalid protocol: ip

The documentation is wrong.  You can only specify TCP or UDP.

> Are there other optimizations, except disabling all not required rules, if
> I want a snort that only scans port 22 for ssh and port 80 for http attacks?

Apart from what was already mentioned, you should only configure
stream5_tcp, ssh, and http_inspect for those ports.

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