Re: Tiny fragments issues

2007-05-22 Thread Suresh Krishnan
Hi Vishwas, Vishwas Manral wrote: Hi Suresh, So are you suggesting the non-last fragment size of less than 1280, example 1200. Not exactly, but I think this should be administratively configurable. (1200 is a nice round number though :-) I still have a doubt on this one. Can we state that

Re: Tiny fragments issues

2007-05-18 Thread Elwyn Davies
Hi. Section 2.1.11 of the Security Overview draft (http://www.ietf.org/internet-drafts/draft-ietf-v6ops-security-overview-06.txt) discusses the 'tiny fragment' problem and tries to reflect Vishwas' original concerns on tiny fragments (see the acknowledgments). After some discussion on the ma

Re: Tiny fragments issues

2007-05-18 Thread Vishwas Manral
Hi Suresh, So are you suggesting the non-last fragment size of less than 1280, example 1200. I still have a doubt on this one. Can we state that the first fragment should have the complete TCP/ UDP headers? I find this essential for the case of stateless filtering, which are easier to do at line

Re: Tiny fragments issues

2007-05-17 Thread Suresh Krishnan
Hi, Jun-ichiro itojun Hagino 2.0 wrote: my take on this is that, for non-final fragment, the packet size must not be smaller than 1280 bytes. there's no valid use for smaller fragments (unless you have special network with MTU < 1280). I tend to disagree. I do think th

Re: Tiny fragments issues

2007-05-16 Thread Jun-ichiro itojun Hagino 2.0
> > my take on this is that, for non-final fragment, the packet size must > > not be smaller than 1280 bytes. there's no valid use for smaller > > fragments (unless you have special network with MTU < 1280). > I agree to the solution. If we get more people talking about the need > for this, we

Re: Tiny fragments issues

2007-05-16 Thread Vishwas Manral
ought up the issue of > http://tools.ietf.org/html/draft-manral-v6ops-tiny-fragments-issues-02 . > > I would want to know if this issue needs to looked further by IPv6. my take on this is that, for non-final fragment, the packet size must not be smaller than 1280 bytes. the

Re: Tiny fragments issues

2007-05-16 Thread Jun-ichiro itojun Hagino 2.0
> At the time of bringing up the amplification attacks i had also > brought up the issue of > http://tools.ietf.org/html/draft-manral-v6ops-tiny-fragments-issues-02 . > > I would want to know if this issue needs to looked further by IPv6. my take on this is that, for non

Tiny fragments issues

2007-05-16 Thread Vishwas Manral
Hi, At the time of bringing up the amplification attacks i had also brought up the issue of http://tools.ietf.org/html/draft-manral-v6ops-tiny-fragments-issues-02 . I would want to know if this issue needs to looked further by IPv6. Thanks, Vishwas