Re: The connections resets after some time.
On Tue, 24 Jan 2017, Daniel Bareiro wrote:
> It's very weird. The cablemodem does not lose Upstream and Downstream
> synchronization, but nevertheless I see that the established connections
> are lost (for example, instant messaging, SSH, or HTTP, to mention a few).
Are you under any sort of stateful packet filtering device (L3+
firewall, NAT/CGNAT gateway, anti-virus device)? Inquire your ISP.
Such devices can _and do_ cause this sort of issue when they hit
resource limits of any sort (such as going over peak capacity of
connection setup/teardown rate, throughput, etc), or during failover,
etc.
It could also be caused by link or routing problems in the ISP backbone,
backhaul, and even in the Internet border itself (ISP to ISP eBGP
links).
> I do not know if it will be related, but on 05/01 there was a service
> interruption between 09.25 and 11.35. After the service was restored, I
> noticed that I was changed from CMTS 10.94.0.1 to 10.96.0.1. Maybe some
> problem in configuring this CMTS?
It could be an issue in the ISP's backhaul or backbone, yes. In that
case, it might be limited to this CMTS, or to a network region, or even
to large sections of the ISP's network.
Ask people you know that use the same ISP in your neighborhood and also
elsewhere in the same city, that might give you extra data on the extent
of the issues.
> Thinking that this could be because it changes the public IP, I checked
> the log of a script that I have to update against Afraid DNS service.
> But several days ago the IP does not change so that does not seem to be
> the problem.
What is your ISP's AS number, please? If you don't know, please look it
up by connecting with a browser to http://bgp.he.net.
> What do you think? Will it be a problem of the Internet provider?
>From the data you provided, it certainly looks like a problem in either
your ISP's network, or their upstream ISPs.
--
Henrique Holschuh
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