Digest for sci.electronics.repair@googlegroups.com - 10 updates in 3 topics

Clark Higgins <clarkhiggins@example.com>: Apr 02 03:04AM

Screenshot is here: https://i.imgur.com/viRZYSU.jpg
 
I just noticed that my router reports a constant barrage of hits from:
 
[DoS attack: Teardrop] attack packets in last 20 sec from ip [153.224.226.205], Friday, Apr 01,2016 19:58:28
 
Any idea what's going on?
Sjouke Burry <burrynulnulfour@ppllaanneett.nnll>: Apr 02 06:56AM +0200

On 02.04.16 5:04, Clark Higgins wrote:
 
> I just noticed that my router reports a constant barrage of hits from:
 
> [DoS attack: Teardrop] attack packets in last 20 sec from ip [153.224.226.205], Friday, Apr 01,2016 19:58:28
 
> Any idea what's going on?
 
Your provider knows.
William Unruh <unruh@invalid.ca>: Apr 02 04:57AM


> I just noticed that my router reports a constant barrage of hits from:
 
> [DoS attack: Teardrop] attack packets in last 20 sec from ip [153.224.226.205], Friday, Apr 01,2016 19:58:28
 
> Any idea what's going on?
 
Sure someone is trying to break and and own your router.
"J.O. Aho" <user@example.net>: Apr 02 10:45AM +0200

On 04/02/2016 05:04 AM, Clark Higgins wrote:
 
> I just noticed that my router reports a constant barrage of hits from:
 
> [DoS attack: Teardrop] attack packets in last 20 sec from ip [153.224.226.205], Friday, Apr 01,2016 19:58:28
 
> Any idea what's going on?
 
 
From wikipedia: https://en.wikipedia.org/wiki/Denial-of-service_attack
 
Teardrop attacks
A teardrop attack involves sending mangled IP fragments with
overlapping, over-sized payloads to the target machine. This can crash
various operating systems because of a bug in their TCP/IP fragmentation
re-assembly code. Windows 3.1x, Windows 95 and Windows NT operating
systems, as well as versions of Linux prior to versions 2.0.32 and
2.1.63 are vulnerable to this attack.
 
(Although in September 2009, a vulnerability in Windows Vista was
referred to as a "teardrop attack", this targeted SMB2 which is a higher
layer than the TCP packets that teardrop used).
 
 
The attacker is trying to find old machines/routers which are vulnerable
to the attack, or it's just a script-kiddy found an old script and now
wants to be a hacker.
 
--
 
//Aho
"Carlos E.R." <robin_listas@invalid.es>: Apr 02 01:39PM +0200

On 2016-04-02 10:45, J.O. Aho wrote:
 
> The attacker is trying to find old machines/routers which are vulnerable
> to the attack, or it's just a script-kiddy found an old script and now
> wants to be a hacker.
 
You (Clark) could try to block that IP, as it seems to be coming from
one only.
 
--
Cheers, Carlos.
 
--- news://freenews.netfront.net/ - complaints: news@netfront.net ---
"Gareth Magennis" <soundserviceleeds@outlook.com>: Apr 01 08:10PM +0100

"Phil Allison" wrote in message
news:6446d7de-43d3-46e8-99c1-2a1634d8b4e3@googlegroups.com...
 
Gareth Magennis wrote:
 
> form,
> and it might just mean I don't have to always cart a big heavy amp to my
> local garage to use their mighty airline, as much fun as it is.
 
** A small scuba diving tank would do the job, you can get 3L ones.
 
They hold air pressures up to 3000psi or about 200 atmospheres - so you get
600L of air.
 
Only problem is recharging one.
 
 
.... Phil
 
 
 
 
 
 
 
 
 
Been Googling a bit, and it seems PCP Air Rifles commonly utilise Scuba
tanks, and you can actually get hand pumps that will provide up to 250 bar.
If you are young and fit enough.
 
http://www.airgunbuyer.com/Showproducts.asp?cat=Charging%20Eqpmt.&SubCat=pumps
 
 
 
 
Gareth.
"Gareth Magennis" <soundserviceleeds@outlook.com>: Apr 02 09:57AM +0100

Been Googling a bit, and it seems PCP Air Rifles commonly utilise Scuba
tanks, and you can actually get hand pumps that will provide up to 250 bar.
If you are young and fit enough.
 
http://www.airgunbuyer.com/Showproducts.asp?cat=Charging%20Eqpmt.&SubCat=pumps
 
 
 
 
 
 
 
 
And here's a small tank.
http://www.stealthunter.co.uk/mini-cylinder-field-charging-unit-1269-p.asp
 
 
Quite an expensive way to get compressed air, though!
 
 
 
 
Gareth.
"Michael A. Terrell" <mike.terrell@earthlink.net>: Apr 01 05:21PM -0400

krw wrote:
> with end caps falling off. I haven't seen the issue for some time,
> though perhaps it was a problem with the manufacturer. Our purchasing
> group prefers Murata, so that's what I use (GRM series).
 
 
We pre baked some boards and other components before assembly and
reflow. That eliminated cracked multilayer SMD capacitors, tombstoning
of two lead components and losing end caps. That was in N Central
Florida which has plenty of humidity problems. The so called HVAC
'engineers' were clueless about how to control the humidity, so we had
to resort to baking. LSI SMD ICs were backed and heat sealed into
antistatic bags with moisture adsorbing packets.
krw <krw@nowhere.com>: Apr 01 07:14PM -0400

On Fri, 01 Apr 2016 17:21:31 -0400, "Michael A. Terrell"
>'engineers' were clueless about how to control the humidity, so we had
>to resort to baking. LSI SMD ICs were backed and heat sealed into
>antistatic bags with moisture adsorbing packets.
 
Sure, baking humidity sensitive parts is common before pick-n-place.
It's a bit less common when hand (de)soldering, though. ;-)
"Michael A. Terrell" <mike.terrell@earthlink.net>: Apr 01 07:43PM -0400

krw wrote:
> >antistatic bags with moisture adsorbing packets.
 
> Sure, baking humidity sensitive parts is common before pick-n-place.
> It's a bit less common when hand (de)soldering, though. ;-)
 
 
We had a high failure rate on hand soldered FIR chips, before we
started baking them. The bottom of the packaging was the thinnest, and
it would bow out as it released steam during hand soldering. No one in
EE or ME believed me, until I finally got them to try it for themselves.
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