With the guy's MAC and IP why cant the cable provider just disconnect him? If they have his mac they can trace him and just remove his cable modem from service or block the DHCP forwarding on his port or a million other things! Gary Baribault Network Architect -----Original Message----- From: owner-firewall-wizardsat_private [mailto:owner-firewall-wizardsat_private]On Behalf Of TUDOR PANAITESCU Sent: Sunday, October 03, 1999 7:38 AM To: firewall-wizardsat_private Subject: Bogus DHCP server in the network.... Hello fellow wizards, Here's the picture. I am a client of Adelphia PowerLink CableTV. They use DHCP for giving IP addresses. In the last weeks a bogus DHCP server showed up into the network giving addresses in 192.168.244.128/25. The guy is using aliasing on his Ethernet interface, he has an address aquired from the ISP in the ISP's range and he configured his interface with 192.168.244.129 too. I have his MAC. He gives DNS services. The system the hacker uses is totally protected, no ports are "visible" to allow to try to do something to his system (can syn flood be a solution?). Some time ago the hacker provided forwarding also but now he's not forwarding anymore anoying lots of people in the net as they don't have access to the INTERNET. I believe it is a UNIX box, most likely LINUX with NAT. Now here comes the question: is anything there we can do to block this guy ? Any answer will be greately appreciated. I will sumarize also for archiving purposes. TIA & best regards, Tudor ____________________________________________________________________ Get free email and a permanent address at http://www.netaddress.com/?N=1
This archive was generated by hypermail 2b30 : Fri Apr 13 2001 - 13:42:16 PDT