[CentOS] OT: what are all these probes from my firewall log????

On 08/17/2012 12:20 AM, John R Pierce wrote:

> the MAC address prefix on that DHCP thing is 00:23:EB which is 
> Cisco...   and yes, ISP's frequently use private IP space for internal 
> gateway networks.   they aren't routable on the public internet, they 
> don't have to be, they are just used for routes within the ISP's WAN.

Yup looks like the ISP is checking to see who's on.

-- 
Bobby