[Flent-users] irtt on flent-london

[Flent-users] irtt on flent-london

[Pete Heist]

There doesn’t seem to be an irtt server running on flent-london. Is it off, or did it go down and was there anything logged?

Pete


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Re: [Flent-users] irtt on flent-london

[Pete Heist]

> On Jan 11, 2019, at 5:00 PM, Dave Taht <dave.taht@gmail.com> wrote:
> 
> I just turned it on again (I think it had crashed).

Interesting, afaik I don’t think there’s a code path by which you wouldn’t get an error message in case of a socket or related error, and malformed packets should just result in drop and log. A native crash, I’m not sure what you’d see, but I’ve never seen that after dozens of testing hours. I’d _love_ to know what happened.

It might be worth compiling from HEAD using Go 1.11.4, in case there was some compiler or runtime bug with whatever it was compiled with.

> I would like to enable irtt fully across the flent network, and with
> liberal defaults (longer tests, shorter intervals). Can you suggest a
> useful set of defaults to use?

Maybe just:
irtt server -i 1ms

plus whatever bind option is needed. Unlimited length tests and packet sizes are the default, and less than 1ms isn’t likely to be useful on the open Internet, I suppose?

> Another option is to make several versions available on different port
> numbers with different default dscp markings. I'd get a kick out of
> being to test udp-lite, as another example.

DSCP marking can currently only be selected by the client, and the server can disallow that if it wants. It could be possible as a new flag to set a default on the server, which is passed to the client during its opening handshake. I think I could do that without a protocol version bump. Feature request?
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Re: [Flent-users] irtt on flent-london

[Pete Heist]

> On Jan 11, 2019, at 5:31 PM, Pete Heist <pete@heistp.net> wrote:
> 
>> On Jan 11, 2019, at 5:00 PM, Dave Taht <dave.taht@gmail.com> wrote:
>> 
>> I just turned it on again (I think it had crashed).

I actually never noticed that it went on, and it isn’t on now. Is it really going down that quickly?


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Re: [Flent-users] irtt on flent-london

[Dave Taht]

I guess so... send me a ssh key?

On Fri, Jan 25, 2019 at 12:26 AM Pete Heist <pete@heistp.net> wrote:
>
>
> > On Jan 11, 2019, at 5:31 PM, Pete Heist <pete@heistp.net> wrote:
> >
> >> On Jan 11, 2019, at 5:00 PM, Dave Taht <dave.taht@gmail.com> wrote:
> >>
> >> I just turned it on again (I think it had crashed).
>
> I actually never noticed that it went on, and it isn’t on now. Is it really going down that quickly?
>


-- 

Dave Täht
CTO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-831-205-9740

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Re: [Flent-users] irtt on flent-london

[Pete Heist]

irtt server running on flent-london, in case anyone wants to try. Compiled head with Go 1.11.4, and invoked with systemd, we’ll see...

> On Jan 26, 2019, at 6:07 AM, Dave Taht <dave.taht@gmail.com> wrote:
> 
> I guess so... send me a ssh key?
> 
> On Fri, Jan 25, 2019 at 12:26 AM Pete Heist <pete@heistp.net> wrote:
>> 
>> 
>>> On Jan 11, 2019, at 5:31 PM, Pete Heist <pete@heistp.net> wrote:
>>> 
>>>> On Jan 11, 2019, at 5:00 PM, Dave Taht <dave.taht@gmail.com> wrote:
>>>> 
>>>> I just turned it on again (I think it had crashed).
>> 
>> I actually never noticed that it went on, and it isn’t on now. Is it really going down that quickly?
>> 
> 
> 
> -- 
> 
> Dave Täht
> CTO, TekLibre, LLC
> http://www.teklibre.com
> Tel: 1-831-205-9740
> 
> _______________________________________________
> Flent-users mailing list
> Flent-users@flent.org
> http://flent.org/mailman/listinfo/flent-users_flent.org


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Re: [Flent-users] irtt on flent-london

[Pete Heist]

> On Feb 1, 2019, at 3:47 AM, Pete Heist <pete@heistp.net> wrote:
> 
> irtt server running on flent-london, in case anyone wants to try. Compiled head with Go 1.11.4, and invoked with systemd, we’ll see…

So far it’s stayed up. I suspect that the problem of the server stopping is because the irtt binary in the Debian package appears to actually be compiled with gccgo, which I have done zero testing on. It looks like there’s a way I can explicitly request the golang.org Go compiler, so I’m working on getting a new version pushed.

Any opinions on whether irtt.service should automatically be installed and enabled on package installation?

Also, I’ll thank Dave for insisting that irtt use a three-way handshake :)

https://www.zdnet.com/article/over-485000-ubiquiti-devices-vulnerable-to-new-attack/

Pete


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