Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking IPv 6 extension headers? (Episode 1000 and counting) (Linux DoS)
Fernando Gont <fgont@si6networks.com> Fri, 26 May 2023 15:11 UTC
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Date: Fri, 26 May 2023 17:10:35 +0200
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To: "Haisheng Yu (Johnson)" <hsyu@cfiec.net>
Cc: "brian.e.carpenter@gmail.com" <brian.e.carpenter@gmail.com>, "andrew.campling@419.consulting" <andrew.campling@419.consulting>, "fernando@gont.com.ar" <fernando@gont.com.ar>, "v6ops@ietf.org" <v6ops@ietf.org>, "ipv6@ietf.org" <ipv6@ietf.org>, "opsec@ietf.org" <opsec@ietf.org>
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From: Fernando Gont <fgont@si6networks.com>
Organization: SI6 Networks
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Subject: Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking IPv 6 extension headers? (Episode 1000 and counting) (Linux DoS)
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Hi, Haisheng Yu, On 26/5/23 06:14, Haisheng Yu (Johnson) wrote: [....] > > The essence of the extension header issue is determined by the > competition between operators and equipment vendors.For most internet > users, they rely on the default configurations provided by the operators > or equipment vendors. Operators always want devices from vendors that > offer powerful features (e.g., in SRv6, equipment vendors aim to support > as many layers of Segment Routing lists as possible). However, during > actual deployment, only a portion of these features is used due to > security concerns. Equipment vendors are motivated to innovate as they > seek to outperform their competitors and gain profits in the market. > > The extension headers in IPv6 provide a significant advantage beyond the > address space of IPv4, enabling flexible and programmable network > transmissions. Looking at the current applications of IPv6 extension > headers, notable achievements have been made (such as SRv6). Perhaps > it's time to consider reducing restrictions on extension headers and > allow for more innovation and application. I'm super fine with folks that have a use for EHs, to use them. -- And I agree that for vendors it's an interesting source fo revenue. That said, I'm not that fine if invited to a party where, if anything, I will only pay the bills. So, I block everything that I don't use. e.g., I have no use for EHs in any of my servers, except the pentesting boxes that I use to send weird packets to others. Cheers, -- Fernando Gont SI6 Networks e-mail: fgont@si6networks.com PGP Fingerprint: F242 FF0E A804 AF81 EB10 2F07 7CA1 321D 663B B494
- [OPSEC] Why folks are blocking IPv6 extension hea… Fernando Gont
- Re: [OPSEC] [IPv6] Why folks are blocking IPv6 ex… Tom Herbert
- Re: [OPSEC] [IPv6] Why folks are blocking IPv6 ex… Ted Lemon
- Re: [OPSEC] [IPv6] Why folks are blocking IPv6 ex… David Farmer
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… nalini.elkins@insidethestack.com
- Re: [OPSEC] [IPv6] Why folks are blocking IPv6 ex… Jen Linkova
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Vasilenko Eduard
- Re: [OPSEC] [IPv6] Why folks are blocking IPv6 ex… Fernando Gont
- Re: [OPSEC] [IPv6] Why folks are blocking IPv6 ex… Fernando Gont
- Re: [OPSEC] [IPv6] Why folks are blocking IPv6 ex… Tom Herbert
- Re: [OPSEC] [IPv6] Why folks are blocking IPv6 ex… Andrew Campling
- Re: [OPSEC] [IPv6] Why folks are blocking IPv6 ex… Andrew Campling
- Re: [OPSEC] [IPv6] Why folks are blocking IPv6 ex… Tom Herbert
- Re: [OPSEC] [IPv6] Why folks are blocking IPv6 ex… Tom Herbert
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Nick Buraglio
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… nalini.elkins@insidethestack.com
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Dale W. Carder
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Nick Buraglio
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Nick Buraglio
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Ackermann, Michael
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Xipengxiao
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Michael McBride
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Ackermann, Michael
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Fernando Gont
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Brian E Carpenter
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Ole Troan
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Haisheng Yu
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Andrew Campling
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Bob Natale
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Tom Herbert
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Ole Troan
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… nalini.elkins@insidethestack.com
- Re: [OPSEC] [EXT] Re: [v6ops] [IPv6] Why folks ar… Bob Natale
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… nalini.elkins@insidethestack.com
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… David Farmer
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Tom Herbert
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Michael Richardson
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Ole Trøan
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… nalini.elkins@insidethestack.com
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Ole Troan
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Tom Herbert
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… David Farmer
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Fernando Gont
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Tom Herbert
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… nalini.elkins@insidethestack.com
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Ole Troan
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… nalini.elkins@insidethestack.com
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Fernando Gont
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Fernando Gont
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Tom Herbert
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Tom Herbert
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Brian E Carpenter
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Michael Richardson
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Brian E Carpenter
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Brian E Carpenter
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… hsyu
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Fernando Gont
- Re: [OPSEC] [EXTERNAL] Re: [IPv6] [v6ops] Why fol… Manfredi (US), Albert E
- Re: [OPSEC] [EXTERNAL] Re: [IPv6] [v6ops] Why fol… Fernando Gont
- Re: [OPSEC] [EXTERNAL] Re: [IPv6] [v6ops] Why fol… Arnaud Taddei
- Re: [OPSEC] [EXTERNAL] Re: [IPv6] [v6ops] Why fol… Vasilenko Eduard
- Re: [OPSEC] [EXTERNAL] Re: [IPv6] [v6ops] Why fol… Arnaud Taddei
- Re: [OPSEC] [EXTERNAL] Re: [IPv6] [v6ops] Why fol… Vasilenko Eduard
- Re: [OPSEC] [EXTERNAL] Re: [IPv6] [v6ops] Why fol… Arnaud Taddei
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… nalini.elkins@insidethestack.com
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… Tom Herbert
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… Tom Herbert
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… nalini.elkins@insidethestack.com
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… Manfredi (US), Albert E
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… Tom Herbert
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… Brian E Carpenter
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… Manfredi (US), Albert E
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… Bob Natale
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Haisheng Yu
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… Warren Kumari
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… Ole Troan
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… Warren Kumari
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… Andrew Campling
- Re: [OPSEC] [EXTERNAL] Re: [IPv6] [v6ops] Why fol… Fernando Gont
- Re: [OPSEC] [IPv6] [v6ops] [EXTERNAL] Re: Why fol… Fernando Gont
- Re: [OPSEC] [v6ops] [IPv6] Why folks are blocking… Fernando Gont
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… Fernando Gont
- Re: [OPSEC] [IPv6] [v6ops] [EXTERNAL] Re: Why fol… Tom Herbert
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Tom Herbert
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… Tom Herbert
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Fernando Gont
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… Clark Gaylord
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Tom Herbert
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Fernando Gont
- Re: [OPSEC] [EXTERNAL] Re: [IPv6] [v6ops] Why fol… Manfredi (US), Albert E
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… Brian E Carpenter
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… Brian E Carpenter
- Re: [OPSEC] [EXTERNAL] Re: [IPv6] [v6ops] Why fol… Tom Herbert
- Re: [OPSEC] [EXTERNAL] Re: [IPv6] [v6ops] Why fol… Manfredi (US), Albert E
- Re: [OPSEC] [v6ops] [EXTERNAL] Re: [IPv6] Why fol… Andrew Alston
- Re: [OPSEC] [EXTERNAL] Re: [IPv6] [v6ops] Why fol… Tom Herbert
- Re: [OPSEC] [EXTERNAL] Re: [IPv6] [v6ops] Why fol… Andrew Campling
- Re: [OPSEC] [IPv6] [EXTERNAL] Re: [v6ops] Why fol… Tom Herbert
- Re: [OPSEC] [IPv6] [v6ops] Why folks are blocking… Dirk Trossen
- Re: [OPSEC] [IPv6] [EXTERNAL] Re: [v6ops] Why fol… Mike Simpson
- Re: [OPSEC] [IPv6] [EXTERNAL] Re: [v6ops] Why fol… Haisheng Yu
- Re: [OPSEC] [IPv6] [EXTERNAL] Re: [v6ops] Why fol… Nick Hilliard
- Re: [OPSEC] [IPv6] [EXTERNAL] Re: [v6ops] Why fol… Fernando Gont
- Re: [OPSEC] [IPv6] [EXTERNAL] Re: [v6ops] Why fol… Bob Natale