Re: [dnsdist] TCP FastOpen
> On May 2, 2019, at 3:32 PM, Casey Deccio wrote:
>
>
>
>> On May 2, 2019, at 11:35 AM, Casey Deccio wrote:
>>
>> Hi,
>>
>> I'm using dnsdist 1.1.0-2+deb9u1 on Debian. I get the following error when
>> I try to enable TCP Fast Open:
>>
>>> setLocal("0.0.0.0:53", { tcpFastOpenSize=100 })
>> Unable to convert parameter from no value to N5boost8optionalIbEE
>>
>> Any suggestions?
>>
>> The answer might be to upgrade, but I've got a running configuration, and
>> I'm hoping not to have to change it (for now) if possible, due to time
>> constraints.
>
> Okay, I compiled and ran 1.3.3 to see if that would make a difference. No
> error, but I can see that no TFO option is being returned by the server:
>
> 15:27:59.865296 IP 192.0.2.1.37032 > 192.0.2.2.53: Flags [S], seq 4015346648,
> win 29200, options [mss 1460,sackOK,TS val 905241474 ecr 0,nop,wscale 7,tfo
> cookiereq,nop,nop], length 0
> 15:27:59.865373 IP 192.0.2.2.53 > 192.0.2.1.37032: Flags [S.], seq
> 4279757276, ack 4015346649, win 28960, options [mss 1460,sackOK,TS val
> 3783501648 ecr 905241474,nop,wscale 7], length 0
>
> $ uname -a
> Linux baritone 4.9.0-7-amd64 #1 SMP Debian 4.9.110-1 (2018-07-05) x86_64
> GNU/Linux
>
> $ cat /proc/sys/net/ipv4/tcp_fastopen
> 3
>
> $ grep -r TCP_FASTOPEN /usr/include/linux/tcp.h
> #define TCP_FASTOPEN 23 /* Enable FastOpen on listeners */
Well I can confirm that the following did *not* work for me for version 1.3.3:
setLocal("0.0.0.0:53", { tcpFastOpenSize=10 })
But I finally tracked down the older options, and this *did* work for version
1.1.0:
setLocal("0.0.0.0:53", true, false, 10)
FYI.
Casey
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Re: [dnsdist] TCP FastOpen
> On May 2, 2019, at 11:35 AM, Casey Deccio wrote:
>
> Hi,
>
> I'm using dnsdist 1.1.0-2+deb9u1 on Debian. I get the following error when I
> try to enable TCP Fast Open:
>
>> setLocal("0.0.0.0:53", { tcpFastOpenSize=100 })
> Unable to convert parameter from no value to N5boost8optionalIbEE
>
> Any suggestions?
>
> The answer might be to upgrade, but I've got a running configuration, and I'm
> hoping not to have to change it (for now) if possible, due to time
> constraints.
Okay, I compiled and ran 1.3.3 to see if that would make a difference. No
error, but I can see that no TFO option is being returned by the server:
15:27:59.865296 IP 192.0.2.1.37032 > 192.0.2.2.53: Flags [S], seq 4015346648,
win 29200, options [mss 1460,sackOK,TS val 905241474 ecr 0,nop,wscale 7,tfo
cookiereq,nop,nop], length 0
15:27:59.865373 IP 192.0.2.2.53 > 192.0.2.1.37032: Flags [S.], seq 4279757276,
ack 4015346649, win 28960, options [mss 1460,sackOK,TS val 3783501648 ecr
905241474,nop,wscale 7], length 0
$ uname -a
Linux baritone 4.9.0-7-amd64 #1 SMP Debian 4.9.110-1 (2018-07-05) x86_64
GNU/Linux
$ cat /proc/sys/net/ipv4/tcp_fastopen
3
$ grep -r TCP_FASTOPEN /usr/include/linux/tcp.h
#define TCP_FASTOPEN23 /* Enable FastOpen on listeners */
Any thoughts?
Thanks!
Casey
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Re: [dnsdist] TCP FastOpen
Hi Casey,
On 02-May-2019 19:35 CEST, wrote:
> Hi,
>
> I'm using dnsdist 1.1.0-2+deb9u1 on Debian. I get the following error when I
> try to enable TCP Fast Open:
>
> > setLocal("0.0.0.0:53", { tcpFastOpenSize=100 })
> Unable to convert parameter from no value to N5boost8optionalIbEE
>
> Any suggestions?
>
> The answer might be to upgrade, but I've got a running configuration, and I'm
> hoping not to have to change it (for now) if possible, due to time
> constraints.
indeed I would recommend upgrading, possibly using the PowerDNS repo [1], 1.1.0
is quite old and you would benefit from newer features/improvements/bug fixes.
[1] https://repo.powerdns.com
--
Nico
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