What is the point of a bot spoofing various ancient user agents while “GET / HTTP/1.1”?

I found the following interesting traffic in my apache log: 213.159.213.236 – – [16/Dec/2019:03:02:03 -0500] “GET / HTTP/1.1” 200 3797 “-” “Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; FSL 7.0.7.01001)” 213.159.213.236 – – [16/Dec/2019:03:02:19 -0500] “GET / HTTP/1.1” 200 3797 “-” “Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; FSL 7.0.7.01001)” 213.159.213.236 – – [16/Dec/2019:03:02:25 -0500]…

Millions of “shrink_slab: ext4_es_scan+0x0/0x130 [ext4] negative objects to delete nr=-2147483358”

On two machines we have a reoccurring problem where the root filesystem gets 100% full because of /var/log/messages filling up with millions of messages as shown below. We have many other machines with the identical HW/SW configuration, but only two are showing this problem. Of course, when the root file system is 100% full other…

Emails are getting temporarily suspended from yahoo and yahoo doesn’t give a damn

I have 4000 awaiting emails to yahoo in my mail queue all looking like these: (delivery temporarily suspended: lost connection with mta7.am0.yahoodns.net[98.136.96.91] while sending RCPT TO) elfo_arya@yahoo.com D0C9B29E4F 15392 Sun Dec 15 19:31:15 nobody@arsacia.ir (delivery temporarily suspended: lost connection with mta7.am0.yahoodns.net[98.136.96.77] while sending RCPT TO) hamid.g1380@yahoo.com D326520AA2 15301 Sun Dec 15 10:18:40 nobody@arsacia.ir (delivery temporarily…