Winstar says there is no TCP/BGP vulnerability

Thu Apr 22 20:34:34 UTC 2004

You can add a RPF-flavored filter like:

Make core-facing network interfaces drop or not route the /30 or /24 
your peering interface is on. Many NAP fabrics IPs are blackholed at 
borders like they should be.

Or you could move your peers to 10.x.x.x addresses and NOT route them 
inside your network, or have them destined to your blackhole community..

Better still. Just have all of your border routers announce the specpfic 
address blocks you have peers or directly connected interfaces on with 
your blackhole community. The routers with directly connected interfaces 
shouldn't mind the exported route and the routers that receive it 
shouldn't be routing it anyway.

Deepak Jain
AiNET

James wrote:

> anti spoofing filtering won't help you with your ebgp peer if the packet
> is spoofed to your peer's address and hits the peering interface. try
> adding GTSM with anti-spoofing. makes it far harder..
> 
> -J
> 
> 
> On Thu, Apr 22, 2004 at 12:14:55AM -0700, Alexei Roudnev wrote:
> 
>>If they make proper anty-spoofiing filtering, no need in MD5. 
>>
>>
>>
>>>Perhaps we are all making too much of this...
>>>
>>>It appears that Winstar feels that there is no need for MD5
>>>authentication of peering sessions. One of our customers has just had
>>>the following response from Winstar following a request to implement MD5
>>>on their OC3 connection to Winstar. My first suggestion is to locate
>>>another upstream provider (they have 3 already).
>>>
>>>However, perhaps someone from Winstar would care to help us all
>>>understand what the alternative solution is to securing the session via
>>>MD5? I would *love* an alternative to the 5 days of work we've just gone
>>>through.
>>>
>>>
>>>>-----Original Message-----
>>>>From: Justin Crawford - NMCW Engineer [mailto:jcrawford at winstar.net]
>>>>Sent: Tuesday, April 20, 2004 11:13 AM
>>>>To: xxxxxx
>>>>Subject: Re: *****SPAM***** MD5 implimentation on BGP
>>>>
>>>>xxxxx,
>>>>
>>>>Winstar does not currently run MD5 authentication with our peers.
>>>>
>>>>Thanks
>>>>
>>>>Justin
>>>>
>>>>Thank you for your time and business
>>>>
>>>>Justin Crawford
>>>>Winstar NMCW
>>>>Ph: 206-xxx.xxxx
>>>
>>>Has anyone else run in to this with Winstar?
>>>
>>>-- 
>>>Rodney Joffe
>>>CenterGate Research Group, LLC.
>>>http://www.centergate.com
>>>"Technology so advanced, even we don't understand it!"(SM)
> 
> 