Re: [v6ops] [ipv6-wg] Extension Headers / Impact on Security Devices
sthaug@nethelp.no Wed, 17 June 2015 20:26 UTC
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Date: Wed, 17 Jun 2015 22:26:02 +0200
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Cc: v6ops@ietf.org, ipv6-wg@ripe.net
Subject: Re: [v6ops] [ipv6-wg] Extension Headers / Impact on Security Devices
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> > Taking into account that stateless ACLs of all router vendors we > > tested (results tb published soon) can be avoided/evaded by adding ~5 > > extension headers to datagrams I fully understand any operator who > > does not want SSH on its devices to be reachable from the Internet > > (over v6 with extension headers) and hence acts in a way similar to > > the one Steinar described. > > There is a big difference between an operator dropping all packets with > EHs that are destined for *his own devices/routers* (I have no problem > with that - your devices, your rules), and an operator that drops > *transit* traffic destined for his customers because his routers cannot > understand/parse/filter its L4/EH payload. I certainly appreciate this distinction. However, problems arise in practice when customers *ask* for various types of protection - which are most sensibly implemented on border routers. Just to be clear - we don't drop IPsec traffic today (neither IPv6 nor IPv4). > In my opinion, an ISP/IP transit network shouldn't even attempt to > parse the L4/EH payload in customer traffic (except if the customer > asks for it of course), it should just deliver the packets. The problem is - the customer *does* ask for it, in many cases. > > I doubt Steinar loses many customers (due to "application breakage") > > by taking that path. In contrary I expect many of his customers > > valueing the increased level of device & network availability gained > > by eliminating an entire class of attacks. > > The first operator I mentioned above won't lose any customers because > his filtering activities doesn't impact customer traffic. The second > operator would lose my business, at least. And probably others' too, as > business customers might want their site2site IPSEC tunnels to work, > residental customers might want their Xbox One online gaming to work, > and so on. I agree - IPSEC tunnels and Xbox One online gaming need to work. That doesn't mean *all* extension header combinations should be expected to work - and it appears that they often don't. I expect we'll see much more of these discussions in the coming years, as IPv6 traffic grows. And I certainly also expect significant size IPv6 DDoS attacks - at least some of which will probably be based on extension header manipulation. Steinar Haug, AS 2116
- [v6ops] Extension Headers / Impact on Security De… Enno Rey
- Re: [v6ops] Extension Headers / Impact on Securit… Brian E Carpenter
- Re: [v6ops] Extension Headers / Impact on Securit… Mark ZZZ Smith
- Re: [v6ops] Extension Headers / Impact on Securit… Gert Doering
- Re: [v6ops] Extension Headers / Impact on Securit… Brian E Carpenter
- Re: [v6ops] Extension Headers / Impact on Securit… Silvia Hagen
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Enno Rey
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Brian E Carpenter
- Re: [v6ops] Extension Headers / Impact on Securit… Ole Troan
- Re: [v6ops] Extension Headers / Impact on Securit… sthaug
- Re: [v6ops] Extension Headers / Impact on Securit… Nick Hilliard
- Re: [v6ops] Extension Headers / Impact on Securit… Fernando Gont
- Re: [v6ops] Extension Headers / Impact on Securit… Ted Lemon
- Re: [v6ops] Extension Headers / Impact on Securit… Gert Doering
- Re: [v6ops] Extension Headers / Impact on Securit… Joe Touch
- Re: [v6ops] Extension Headers / Impact on Securit… Joe Touch
- Re: [v6ops] Extension Headers / Impact on Securit… Ted Lemon
- Re: [v6ops] Extension Headers / Impact on Securit… Brian E Carpenter
- Re: [v6ops] Extension Headers / Impact on Securit… Brian E Carpenter
- Re: [v6ops] Extension Headers / Impact on Securit… Joe Touch
- Re: [v6ops] Extension Headers / Impact on Securit… Sander Steffann
- Re: [v6ops] Extension Headers / Impact on Securit… Mark ZZZ Smith
- Re: [v6ops] Extension Headers / Impact on Securit… Brian E Carpenter
- Re: [v6ops] Extension Headers / Impact on Securit… Tim Chown
- Re: [v6ops] Extension Headers / Impact on Securit… Eric Vyncke (evyncke)
- Re: [v6ops] Extension Headers / Impact on Securit… Silvia Hagen
- Re: [v6ops] Extension Headers / Impact on Securit… Nick Hilliard
- Re: [v6ops] Extension Headers / Impact on Securit… Mark ZZZ Smith
- Re: [v6ops] Extension Headers / Impact on Securit… Brian E Carpenter
- Re: [v6ops] Extension Headers / Impact on Securit… Brian E Carpenter
- Re: [v6ops] Extension Headers / Impact on Securit… Joe Touch
- Re: [v6ops] Extension Headers / Impact on Securit… Brian E Carpenter
- Re: [v6ops] Extension Headers / Impact on Securit… Joe Touch
- Re: [v6ops] Extension Headers / Impact on Securit… Brian E Carpenter
- Re: [v6ops] Extension Headers / Impact on Securit… Joe Touch
- Re: [v6ops] Extension Headers / Impact on Securit… Gert Doering
- Re: [v6ops] Extension Headers / Impact on Securit… Ray Hunter
- Re: [v6ops] Extension Headers / Impact on Securit… Tim Chown
- Re: [v6ops] Extension Headers / Impact on Securit… Joe Touch
- Re: [v6ops] Extension Headers / Impact on Securit… Brian E Carpenter
- Re: [v6ops] Extension Headers / Impact on Securit… Joe Touch
- Re: [v6ops] Extension Headers / Impact on Securit… Eric Vyncke (evyncke)
- Re: [v6ops] Extension Headers / Impact on Securit… Joe Touch
- Re: [v6ops] Extension Headers / Impact on Securit… Stefano Previdi (sprevidi)
- Re: [v6ops] Extension Headers / Impact on Securit… Stefano Previdi (sprevidi)
- Re: [v6ops] Extension Headers / Impact on Securit… Howard, Lee
- Re: [v6ops] Extension Headers / Impact on Securit… Fred Baker (fred)
- Re: [v6ops] Extension Headers / Impact on Securit… Fred Baker (fred)
- Re: [v6ops] Extension Headers / Impact on Securit… Joe Touch
- Re: [v6ops] Extension Headers / Impact on Securit… Enno Rey
- Re: [v6ops] Extension Headers / Impact on Securit… Eric Vyncke (evyncke)
- Re: [v6ops] Extension Headers / Impact on Securit… Ca By
- Re: [v6ops] Extension Headers / Impact on Securit… Mark ZZZ Smith
- Re: [v6ops] Extension Headers / Impact on Securit… Ca By
- Re: [v6ops] Extension Headers / Impact on Securit… Jen Linkova
- Re: [v6ops] Extension Headers / Impact on Securit… Joe Touch
- Re: [v6ops] Extension Headers / Impact on Securit… Brian E Carpenter
- Re: [v6ops] Extension Headers / Impact on Securit… Fred Baker (fred)
- Re: [v6ops] Extension Headers / Impact on Securit… Ca By
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Fred Baker (fred)
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Enno Rey
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Jen Linkova
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … sthaug
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Nick Hilliard
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Jen Linkova
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Jen Linkova
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … sthaug
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Enno Rey
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Jen Linkova
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Enno Rey
- Re: [v6ops] Extension Headers / Impact on Securit… Ca By
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Fred Baker (fred)
- Re: [v6ops] Extension Headers / Impact on Securit… Jen Linkova
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Enno Rey
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Brian Haberman
- Re: [v6ops] Extension Headers / Impact on Securit… Joe Touch
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Enno Rey
- Re: [v6ops] Extension Headers / Impact on Securit… Fred Baker (fred)
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Tore Anderson
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Brian Haberman
- Re: [v6ops] Extension Headers / Impact on Securit… Joe Touch
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Enno Rey
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Tore Anderson
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … sthaug
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Brian E Carpenter
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Warren Kumari
- Re: [v6ops] Extension Headers / Impact on Securit… Brian E Carpenter
- [v6ops] So what is or are the problem or problems… Mark ZZZ Smith
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … sthaug
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Brian Haberman
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Gert Doering
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Joe Touch
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Ole Troan
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … sthaug
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Ole Troan
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Enno Rey
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Mark ZZZ Smith
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Brian E Carpenter
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Warren Kumari
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Ronald Bonica
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Mark ZZZ Smith
- Re: [v6ops] Extension Headers / Impact on Securit… Fernando Gont
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Fernando Gont
- Re: [v6ops] [ipv6-wg] Extension Headers / Impact … Brian Haberman