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photo upload test thread

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dikidera
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Re: photo upload test thread

Post by dikidera »

I am now on a different machine again, I am not logged into darylrobert's account, but refreshing the page or rather going to https://www.matthewsvolvosite.com/forums/ I am not logged in. But if I explicitly go to index.php I am logged in.

I have cleared cache.

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Post by matthew1 »

Yea that index page bug is a known issue I've been meaning to get to. I see it also on Firefox on PC. It's an annoyance.

The cross-logged in problem is more serious, and my working theory is that at one time months or years ago your browser was assigned the same random number as darylrobert in the sessions table. It's an astronomical improbability, but still possible. For whatever reason, your browser is hanging onto that session ID.

Which browser is it? If you tell me that I can tell you how to delete MVS cookies and all data. This will not affect your MVS account, your posts, etc. here on the forum. It will only nuke what your browser is stubbornly holding onto regarding cookies, cached pages, etc. Don't rely on the MVS "Delete cookies" link at the bottom of pages for this.

Your account and all your posts are stored safely on the MVS server hard drive, and nothing you do with browser settings can affect that.
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dikidera
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Post by dikidera »

I have a habit of defying the odds. I have discovered many bugs out there which required specific steps to be taken to trigger them and I did so accidentally just by existing and doing my thing. In any case I have cleared the cache.

Is it possible that your server somehow momentarily had a broken rng?

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Post by matthew1 »

On Firefox on PC, if that's what you're using, click the padlock icon in the address bar, and select "Clear cookies and site data...". Alternatively, you can go to Settings > Privacy & Security > Cookies and Site Data > Manage Data..., search for matthewsvolvosite.com, select it, and click Remove All Shown.

dikidera wrote: 16 Nov 2025, 14:07 Is it possible that your server somehow momentarily had a broken rng?
rng?
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Post by dikidera »

rng = random number generator. I dont know how phpbb does these session tables but if there is some seed it uses and your linux box's /dev/random or /dev/urandom was empty or low on entropy, then it may very well have chosen a not so random number which produced this side effect.

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Post by matthew1 »

Ah right. Could be. I haven't looked, but either way that column should have UNIQUE flag. That would be best practices.

The scenario I see would be that darylrobert's account got it, then I zeroed the sessions table, then you got it. I don't zero that table often, maybe once a year or once every two years.
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Post by dikidera »

Honestly it all seems fine now, I think.

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Post by abscate »

Got the high traffic warning this morning? As suggested, reloaded page amd all was well
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Post by matthew1 »

Yes, it's a regular thing. As I've conjectured before, it's content harvesting bots, either noble sources like Google/Bing, or the less desirable AI training harvesters, or the more mundane and undesirable content scrapers we've been living with for 20-25 years. Most of the bad actor requests come from Asia now.

The difference between what I see today vs 10 or 20 years ago: today I see short duration but very intensive page requests, like hundreds or thousands of requests per minute from the same source (ASNum) but spread across a handful or dozens of IP addresses. I'd go way out on a limb and guess that those sources see MVS as an enterprise-class server, able to flex rapidly to handle these intense bursts that stress the server.

Why is that my working theory? The alternative does not make sense. The alternative is that these sources don't care that they overwhelm the target server, knocking it offline. That's counterproductive to them... when MVS is slow or unresponsive those bots, noble or not, can't harvest content.
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matthew1
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Post by matthew1 »

Soooo much of Web server greater environment is strange/unexplainable to me, but I don't do it as part of a team at a company so many/most/all of these mysteries I don't have answers for because I don't have access to professional knowledge.

Now that AI is increasing its intelligence at an exponential rate, I could find answers via it. There's an irony there.
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2004 V70 R [gone]

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