Educause Security Discussion mailing list archives
Re: HEOA Question
From: "Harry E Flowers (flowers)" <flowers () MEMPHIS EDU>
Date: Wed, 2 Feb 2011 16:03:07 -0600
I think this is the most robust answer; if you have enough public addresses to do 1:1 NAT, it's a lot easier to track down versus overloaded addresses with port mapping (PAT) and chasing ports. And just because you now get port info from RIAA doesn't mean that someone else won't send you a "someone.yourplace.edu" was doing x suspicious or nefarious deed on my network... Anyway, I was over the networks at the last college where I worked several years ago, and we used the 1:1 NAT to make it easier to track down the source of problems. We had plenty of address space for concurrent access, though, so it was an easy choice for us to make. If you're forced to use PAT because you have more systems accessing the Internet at a given time than you have public addresses, then that's obviously a different story. -- Harry Flowers From: The EDUCAUSE Security Constituent Group Listserv [mailto:SECURITY () LISTSERV EDUCAUSE EDU] On Behalf Of Bulanda, Dave G Sent: Monday, January 31, 2011 10:40 AM To: SECURITY () LISTSERV EDUCAUSE EDU Subject: Re: [SECURITY] HEOA Question Works well in the 1:1 Nat... which I am running but yes I have some overflow into PAT which yes is a problem without the source port in the notice. Sometimes you have to throw it back and say "Go Fish." :) I do use some scripts to breakdown the logs for the request... Got a little annoying building a grep and pipe statement to get what was needed, then forgetting a step and not getting anything or too much logs. David Bulanda Network Services Manager dgbulanda () indianatech edu<mailto:dgbulanda () indianatech edu> Indiana Tech<http://www.indianatech.edu/> From: The EDUCAUSE Security Constituent Group Listserv [mailto:SECURITY () LISTSERV EDUCAUSE EDU] On Behalf Of Gioia, Matthew P. Sent: Monday, January 31, 2011 11:14 AM To: SECURITY () LISTSERV EDUCAUSE EDU Subject: Re: [SECURITY] HEOA Question This is similar to what we do as well - things get dicey and when the complaint doesn't include the source port though - usually you can pin it down throwing in netflow and/or application layer data as well though. So you'll be going through logs or reports from the firewall + dhcp server (which you could also throw at syslog) + netflow + whatever traffic shaping device in the roughest circumstances. Having some application or scripts to search through the logs will really speed up the process. Matthew Gioia, CISSP Network Security Analyst St. Louis Community College (314) 539-5075 From: The EDUCAUSE Security Constituent Group Listserv [mailto:SECURITY () LISTSERV EDUCAUSE EDU] On Behalf Of Bulanda, Dave G Sent: Monday, January 31, 2011 9:25 AM To: SECURITY () LISTSERV EDUCAUSE EDU Subject: Re: [SECURITY] HEOA Question Bill, I have been using NAT on my perimeter for about 10 years... I logged the translations to a syslog server. Then match outside to inside addresses for the time. All my students are registered with PacketFence NAC. Just look up the inside translation address to the Packetfence logs/interface (sometime against DHCP logs to verify). The process can suck... but I can usually process a notice fairly quickly. I don't have to handle very many notices since we lay it on the Freshman about using file-sharing. Plus the small fine for violation helps a bit. David Bulanda Network Services Manager dgbulanda () indianatech edu<mailto:dgbulanda () indianatech edu> Indiana Tech<http://www.indianatech.edu/> From: The EDUCAUSE Security Constituent Group Listserv [mailto:SECURITY () LISTSERV EDUCAUSE EDU] On Behalf Of William Derwostyp Sent: Monday, January 31, 2011 9:44 AM To: SECURITY () LISTSERV EDUCAUSE EDU Subject: [SECURITY] HEOA Question I need some input. Here at USM the students are segregated to a wireless network that is now behind a single address(NAT). This has caused a problem with responding to RIAA notices as we cannot tie the notice to a specific user on the network which in turn affect the compliance to the "Higher Education Opportunity Act" (HEOA). I am going to assume that there are other universities that use the NAT process to control traffic on their perimeter and use non-routable addresses on the internal network. Is there any tool or application I can use that will help to tie the notices back to the person without having to go back to public addressing? William (Bill) Derwostyp, CISSP, G7799, GCIH, GSNA, GSLC, GSPA, GSEC, CCNA, CCSE Technology Security Officer University of Southern Mississippi william.derwostyp () usm edu<mailto:william.derwostyp () usm edu> Office: 601-266-5416 [cid:image001.jpg@01CBC2F1.5C1A5E90][cid:image002.jpg@01CBC2F1.5C1A5E90] Confidentiality Note: The information contained in this e-mail and/or document(s) attached is for the exclusive use of the individual named above and may contain confidential, privileged, and non- disclosable information. If you are not the intended recipient, you are hereby notified that you are strictly prohibited from reading, photocopying, distributing or otherwise using this e-mail or contents in any way. If you have received this transmission in error, please notify me immediately.
Current thread:
- HEOA Question William Derwostyp (Jan 31)
- Re: HEOA Question Matthew Gracie (Jan 31)
- Re: HEOA Question Eme Ejike (Jan 31)
- Re: HEOA Question Kevin Wilcox (Jan 31)
- Re: HEOA Question SCHALIP, MICHAEL (Jan 31)
- Re: HEOA Question Steve Worona (Feb 01)
- Re: HEOA Question Bulanda, Dave G (Jan 31)
- Re: HEOA Question Gioia, Matthew P. (Jan 31)
- Re: HEOA Question Bulanda, Dave G (Jan 31)
- Re: HEOA Question Harry E Flowers (flowers) (Feb 02)
- Re: HEOA Question Dave Inman (Feb 03)
- Re: HEOA Question Gioia, Matthew P. (Jan 31)
- Re: HEOA Question Matthew Gracie (Jan 31)
- Re: HEOA Question Cal Frye (Jan 31)
- Re: HEOA Question Jacobson, Dick (Jan 31)
- Re: HEOA Question Dexter Caldwell (Jan 31)
- Re: HEOA Question Jacobson, Dick (Jan 31)
- Re: HEOA Question Cal Frye (Jan 31)