Re: IPv6 Fragmentation

2021-02-21 Thread Kristof Provost
On 21 Feb 2021, at 0:02, Doug Hardie wrote: On 20 February 2021, at 04:13, Kristof Provost wrote: If you don’t have scrub fragment reassemble set then you have to include something like pass log inet6 proto ipv6-frag all to pass fragmented packets (assuming you block by default). You reall

Re: IPv6 Fragmentation

2021-02-20 Thread Doug Hardie
> On 20 February 2021, at 04:13, Kristof Provost wrote: > > If you don’t have scrub fragment reassemble set then you have to include > something like pass log inet6 proto ipv6-frag all to pass fragmented packets > (assuming you block by default). > > You really, really want scrub fragment re

Re: IPv6 Fragmentation

2021-02-20 Thread Kristof Provost
On 20 Feb 2021, at 5:32, Doug Hardie wrote: On 19 February 2021, at 01:48, Michael Tuexen wrote: On 19. Feb 2021, at 03:29, Doug Hardie wrote: I don't know if this is a feature or a bug. On FreeBSD 9, the following ping worked: ping6 -s 5000 -b 6000 fe80::213:72ff:fec3:180f%dc0 I don't

Re: IPv6 Fragmentation

2021-02-20 Thread Michael Tuexen
> On 20. Feb 2021, at 05:32, Doug Hardie wrote: > >> On 19 February 2021, at 01:48, Michael Tuexen >> wrote: >> >>> On 19. Feb 2021, at 03:29, Doug Hardie wrote: >>> >>> I don't know if this is a feature or a bug. On FreeBSD 9, the following >>> ping worked: >>> >>> ping6 -s 5000 -b 6000

Re: IPv6 Fragmentation

2021-02-19 Thread Doug Hardie
> On 19 February 2021, at 01:48, Michael Tuexen > wrote: > >> On 19. Feb 2021, at 03:29, Doug Hardie wrote: >> >> I don't know if this is a feature or a bug. On FreeBSD 9, the following >> ping worked: >> >> ping6 -s 5000 -b 6000 fe80::213:72ff:fec3:180f%dc0 > I don't have a dc0 interface,

Re: IPv6 Fragmentation

2021-02-19 Thread Doug Hardie
> On 19 February 2021, at 01:48, Michael Tuexen > wrote: > >> On 19. Feb 2021, at 03:29, Doug Hardie wrote: >> >> I don't know if this is a feature or a bug. On FreeBSD 9, the following >> ping worked: >> >> ping6 -s 5000 -b 6000 fe80::213:72ff:fec3:180f%dc0 > I don't have a dc0 interface,

Re: IPv6 Fragmentation

2021-02-19 Thread Michael Tuexen
> On 19. Feb 2021, at 03:29, Doug Hardie wrote: > > I don't know if this is a feature or a bug. On FreeBSD 9, the following ping > worked: > > ping6 -s 5000 -b 6000 fe80::213:72ff:fec3:180f%dc0 I don't have a dc0 interface, but using re0 at one side and bge at the other, I get with FreeBSD CU

Re: IPv6 fragmentation weirdness

2009-05-25 Thread JINMEI Tatuya / 神明達哉
At Thu, 14 May 2009 14:42:35 -0700, "Kevin Oberman" wrote: > I then captured the ICMP and discovered that the kernel was fragmenting > all of them! Worse, the fragment was sent out before the ICMP! What the > heck is going on! Thread synchronization? > > When I captured the packets (via tcpdump

Re: IPv6 fragmentation weirdness

2009-05-15 Thread Steve Bertrand
Steve Bertrand wrote: > Kevin Oberman wrote: > >> Second, why the heck is the fragment going out first? This should be OK, >> but I suspect many firewalls (which are often not happy with fragments) >> are not likely to pass a fragment which precedes the initial frame. > > I'll try to find some ti

Re: IPv6 fragmentation weirdness

2009-05-15 Thread Steve Bertrand
Kevin Oberman wrote: > Second, why the heck is the fragment going out first? This should be OK, > but I suspect many firewalls (which are often not happy with fragments) > are not likely to pass a fragment which precedes the initial frame. I'll try to find some time today to see if I can replicat

Re: IPv6 fragmentation weirdness

2009-05-14 Thread Bjoern A. Zeeb
On Thu, 14 May 2009, Kevin Oberman wrote: Hi, Date: Fri, 15 May 2009 00:09:02 +0200 (CEST) From: sth...@nethelp.no First, why is the kernel fragmenting this at all as it fits in the interface MTU? Good question, I definitely disagree with this behavior and would say that it breaks POLA. But

Re: IPv6 fragmentation weirdness

2009-05-14 Thread Kevin Oberman
> Date: Fri, 15 May 2009 00:09:02 +0200 (CEST) > From: sth...@nethelp.no > > > First, why is the kernel fragmenting this at all as it fits in the > > interface MTU? > > Good question, I definitely disagree with this behavior and would say > that it breaks POLA. But it's documented (see the ping6

Re: IPv6 fragmentation weirdness

2009-05-14 Thread sthaug
> First, why is the kernel fragmenting this at all as it fits in the > interface MTU? Good question, I definitely disagree with this behavior and would say that it breaks POLA. But it's documented (see the ping6 -m option). > Can anyone fetch anything from ftp.funet.fi via IPv6? I suspect it is >