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Defenses against crashers?
#1
Hey guys,

are there any ways to prevent from being crashed by another person?
Like turning certain settings on or off?
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#2
Standard functions in Firestorm:
- Turn on defense against spam
- Use movelock to prevent yourself from being hurled around the sim
- Turn off rendering of surfaces with excessively large textures





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#3
theres a new(er) crasher out thats crashing sims like crazy, so annoying esp when all my meshes reset appearance on relog. i tried all what Sahulat suggest and still sim goes down- think is a real sim crasher not graphical but i dont know. good luck brap, could do what i do n use setting to "hide all but friends" sometimes that helps but mostly if i crash its because someone brought the sim down with other way than graphical (i think)?
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#4
(12-25-2018, 11:59 AM)Mullicakes Wrote:

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theres a new(er) crasher out thats crashing sims like crazy, so annoying esp when all my meshes reset appearance on relog.  i tried all what Sahulat suggest and still sim goes down- think is a real sim crasher not graphical but i dont know.  good luck brap, could do what i do n use setting to "hide all but friends" sometimes that helps but mostly if i crash its because someone brought the sim down with other way than graphical (i think)?

Sims are ofcourse not brought down with graphics.
Linden fixed most old crashing methods like self replicating scripted physical stuff eating all of the sim time.
A sim does however have a fixed ip number for a long time ...





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#5
Well if someone does have the IP of the sim they could DDOS it but surely LL has some protections in place for this no? It seems like a rather drastic measure to just bring a sim down. I do wonder if a very heavy mesh model could bring down a server, causing everyone on there to pull a huge amount of data maybe?
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#6
theres a guy whos been instant crashing sims now for a years on a daily basis. idk what he is using but i do know it hasnt been patched and he has been given 12 cease and desist notices from LL. it has something to do with abusing the pathfinding and physics by just wearing a prim in any sim. INSTANTLY the sim goes down....yeah idk where he got it but we need it
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#7
Could be some sort of buffer overflow in the path finding code then? Trying to path to a destination vector that's out of bounds or something? I don't really see the point in it..Or perhaps changing the desination vector really quickly could cause issues. I don't know if LL used a third party engine for the pathfinding or made their own.
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#8
its just insane such a big attack vector hasnt been addressed by LL
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#9
(01-01-2019, 09:51 PM)modrikai Wrote:

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  I do wonder if a very heavy mesh model could bring down a server, causing everyone on there to pull a huge amount of data maybe?

No, this is hardly possible.  I tried that myself.  You simply get a message that the sim cannot rez the object because it is too big.  I wasn't trying to crash the sim, just a wrong mesh - prim - sculpt combination that made the whole link way over the sim capacity.  I tried several times, even as an administrator, it didn't let me.

One of my friends came up with a "nuke" amo to his gun.  I haven't seen this in action, but, the result was serious damage to the whole sim structure, never mind "sim crush".
Needless to say, he was no longer welcomed at that sim - perma ban.  But, he didn't get ban from SL.  Although LL was involved in restoring the sim, he just got simple ban in that location.
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#10
(12-20-2018, 04:45 AM)Sahulat Wrote:

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Standard functions in Firestorm:
- Turn on defense against spam
- Use movelock to prevent yourself from being hurled around the sim
- Turn off rendering of surfaces with excessively large textures

Another one to add is complexity. Depending on the user's hardware, >1 million complexity could be enough for a crash (instability or extremely severe FPS drop). Most people are under 350k anyway.
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