Re: [Lwip] Suggestions in draft-mglt-lwig-minimal-esp

["Tobias Guggemos" <[e-mail]>]

Hey Ashok,

thanks for your feedback.

For your first comment I tend to agree and I think we can add this to the
draft!

For the second, I agree with your assumption that tunnels might appear in
constrained scenarios (it’s actually one of our main goals for ipsec/esp).
However, I’m not sure if this recommendation to not use fragmentation is
valid on a security side, why I’d like to give the question to the ipsecme
WG, if that does not open any other security issues? Or if there is anything
else to consider on that?

Thanks

Tobias

 

Von: Raja ashok [mailto:[e-mail]] 
Gesendet: Freitag, 14. Juli 2017 16:22
An: [e-mail]
Cc: [e-mail]
Betreff: Suggestions in draft-mglt-lwig-minimal-esp 

 

Hi Daniel & Tobias,

 

I gone through the lwIG draft for ESP. I am having some doubts and
suggestions which are listed below. Please check and provide your comments.

 

1)     For replay protection, RFC 4303 suggests to use 32 or 64 bit window.
I feel in this draft, we can recommend to use 32 bit window for replay
protection.

 

2)     Tunneled ESP msg with fragmented IP header (in ESP payload) may leads
to DoS vulnerability for a constraint receiver. RFC 4303 is suggesting this
fragmentation as optional. So I feel we can mention as fragmentation and
reassembly is not required to support in tunneled IP header. As it can be
handled by the IP header which carries ESP msg. I hope tunneled ESP msg
might be required in some scenarios of constraint devices also.

 

Regards,

Ashok

 

  _____  



Raja Ashok V K
Huawei Technologies
Bangalore, India
http://www.huawei.com 

  _____  

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