On 2016-10-26 08:44:00 (+0000), Lluís wrote:

I'm very sad Jazztel is the one that turns out to be **really** unstable for me.

You mentioned "VDSL" in the OP, however I'm talking about fiber. Maybe by switching technologies you could get an improved service. -- David Serrano PGP: 1BCC1A1F280A01F9

Thanks everyone for your assistance. I'm looking out for an ISP **and** putting all this information into practice ASAP. I'll be glad to share notes, whenever, again. Lluís Julien ROBIN:

Hi,

You can check if there is no physical problem on your line, just in case ! Connect to your modem integrated web ui and check ATM statistics of your DSL line. Of course the first step is to watch the "DSL" signal light when you are disconnected. If it's a loss of DSL signal then it's a physical/local problem ! After some checks you can ask your ISP for maintenance on your line. Or try another ISP if this one is unable to find and repair your line (hoping that the next one will be able to do it fine).

But if the DSL connection is running fine when you cannot access anything anymore, then it's your provider's network that is down (then you must probably find another one !).

Some useful information : SNR margin should be, for an optimized bandwidth/stability, 6dB (it means that the useful signal is 4 times stronger (in milliwatts) than the noise on your line); it can be moving to 4 to 8 between hours but it's generally supposed to be smooth along hours. Some providers settings are different (10dB target margin, with a small loss of bandwidth).

When connected, check your upload/download ATM Speed and the SNR Margin for both upload and download. In electronics 3dB is a good minimal standard, but for telecommunication lines, the standard value is multiplied by two because of environments induced noise that is moving along the day. If the Margin is going under 3dB and is still going down, you're probably going to be disconnected soon, and then reconnected with a lower bandwidth (and may be a new IP address).

If SNR margin is moving up and down (like 11db, 2db, 7dB, 9dB, 3dB, and disconnected for example) and a very different bandwidth at each connection, then you have a problem on your physical line !

Useful tip for reparation : a line is not just a conductor, it's a very long conductor like an antenna, capacitor and lot of things. Then "injecting" signal into it needs a certain amount of milliwatts. At the other side of the line, "reading" the signal doesn't really need to consume current. So, when there is a defective contact near your home, your download bandwidth is quite clean. But your upload bandwith is low and changing between each new connection. In that case, check all your connections and cable.

At the opposite, when the is a weak contact into the ISP equipments, your upload bandwidth is generally fine and stable, but not your download bandwidth / SNR Margin. Then in that case, it's very easy for your ISP to fix it.

Sometimes, it's one of the modem at one side that is defective.

Also, if connection problems are occurring at particular events (switching on some device for example) you can try to find what : sometimes there is devices (set top boxes or anything else) that are defective and doing a lot of electronic high frequency noise into cables and electric wires, it's a frequent case that can make your line (and your neighbors lines !) to stop working fine. If so, change/repair the device or his power supply unit ! If it's your neighbors, only an official technician can do the job to find who and what.

Good luck ;)

Best regards, Julien ROBIN

Le 26/10/2016 à 10:11, Lluís a écrit :

...

Hello,

I am a relay operator in Spain (or at least I try to).

I am just desperate with my ISP, he is just leaving the VDSL2 connection down several times a day, taking the relay with it.

Does anyone know a much more stable, tor-friendly, ISP for an Spanish user ?

The following record of assigned IPs in a **single** day shows the dimension of the drama:

95.23.157.152 - Tue Oct 25 01:00:02 CEST 2016 95.23.156.52 - Tue Oct 25 07:00:02 CEST 2016 95.23.157.180 - Tue Oct 25 11:54:06 CEST 2016 188.79.227.152 - Tue Oct 25 12:20:52 CEST 2016 95.23.155.112 - Tue Oct 25 13:12:30 CEST 2016 95.23.144.75 - Tue Oct 25 13:15:19 CEST 2016 188.77.208.15 - Tue Oct 25 13:29:02 CEST 2016 95.23.159.249 - Tue Oct 25 14:00:06 CEST 2016 95.23.146.89 - Tue Oct 25 14:12:12 CEST 2016 95.23.159.163 - Tue Oct 25 14:19:21 CEST 2016 188.79.238.188 - Tue Oct 25 14:34:55 CEST 2016 188.79.237.90 - Tue Oct 25 14:36:05 CEST 2016 188.79.229.164 - Tue Oct 25 14:57:30 CEST 2016 95.23.149.124 - Tue Oct 25 15:08:51 CEST 2016 188.79.237.0 - Tue Oct 25 15:10:12 CEST 2016 188.77.213.199 - Tue Oct 25 16:28:47 CEST 2016 95.23.153.98 - Tue Oct 25 16:32:50 CEST 2016 95.23.146.46 - Tue Oct 25 16:49:03 CEST 2016 188.79.235.239 - Tue Oct 25 17:10:03 CEST 2016 188.77.215.232 - Tue Oct 25 17:20:03 CEST 2016 95.23.146.36 - Tue Oct 25 17:30:03 CEST 2016 95.23.148.238 - Tue Oct 25 18:10:03 CEST 2016 95.23.149.136 - Tue Oct 25 18:20:03 CEST 2016 188.77.211.53 - Tue Oct 25 18:50:03 CEST 2016 188.77.211.90 - Tue Oct 25 19:30:03 CEST 2016 188.79.225.153 - Tue Oct 25 20:10:01 CEST 2016 95.23.157.171 - Tue Oct 25 21:00:02 CEST 2016 188.77.212.227 - Tue Oct 25 22:00:02 CEST 2016 95.23.157.179 - Tue Oct 25 22:30:02 CEST 2016

Thanks for your assintance, Lluís _______________________________________________ tor-relays mailing list tor-relays@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays

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