* nf_nat_tftp broken in 4.8?
@ 2016-11-09 20:40 Florian Fainelli
2016-11-09 21:56 ` Florian Westphal
0 siblings, 1 reply; 3+ messages in thread
From: Florian Fainelli @ 2016-11-09 20:40 UTC (permalink / raw)
To: netdev, netfilter-devel, fgao; +Cc: pablo
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Hi,
After updating my workstation from 4.4 to 4.8, which also serves as a
NAT gateway for local machines, I noticed that TFTP across this NAT box
broke:
- TFTP read request to the server, source port 3534
- server replies with a data packet to dst port 3534
- gateway sends an ICMP destination unreachable with port unreachable
along with the UDP data packet
I am currently bisecting this, but it is taking a lot longer to build
than I thought. Attached is the non-working case PCAP file for you to
look at.
There has not been a lot happening for net/netfilter/*tftp* between v4.4
and 4.8, so can you think about something in particular that could cause
that?
Thanks!
--
Florian
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: nf_nat_tftp broken in 4.8?
2016-11-09 20:40 nf_nat_tftp broken in 4.8? Florian Fainelli
@ 2016-11-09 21:56 ` Florian Westphal
2016-11-09 22:18 ` Florian Fainelli
0 siblings, 1 reply; 3+ messages in thread
From: Florian Westphal @ 2016-11-09 21:56 UTC (permalink / raw)
To: Florian Fainelli; +Cc: netdev, netfilter-devel, fgao, pablo
Florian Fainelli <f.fainelli@gmail.com> wrote:
> After updating my workstation from 4.4 to 4.8, which also serves as a
> NAT gateway for local machines, I noticed that TFTP across this NAT box
> broke:
does 'sysctl net.netfilter.nf_conntrack_helper=1' help?
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: nf_nat_tftp broken in 4.8?
2016-11-09 21:56 ` Florian Westphal
@ 2016-11-09 22:18 ` Florian Fainelli
0 siblings, 0 replies; 3+ messages in thread
From: Florian Fainelli @ 2016-11-09 22:18 UTC (permalink / raw)
To: Florian Westphal; +Cc: netdev, netfilter-devel, fgao, pablo
On 11/09/2016 01:56 PM, Florian Westphal wrote:
> Florian Fainelli <f.fainelli@gmail.com> wrote:
>> After updating my workstation from 4.4 to 4.8, which also serves as a
>> NAT gateway for local machines, I noticed that TFTP across this NAT box
>> broke:
>
> does 'sysctl net.netfilter.nf_conntrack_helper=1' help?
>
It does yes, thanks, and apologies for not seeing that earlier.
--
Florian
^ permalink raw reply [flat|nested] 3+ messages in thread
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