Hi, While testing, concurrent posting to a cgi script from two separate browsers causes an 500 internal server error on one browser but successful submission on the other.
That indicates that the more users one has, the higher the chance that more people would be accessing the script at the same time and hence complaints about 500 internal server error. ****************************************************************** # $OpenBSD: httpd.conf,v 1.20 2018/06/13 15:08:24 reyk Exp $ server "xyz.com" { listen on * port 80 location "/.well-known/acme-challenge/*" { root "/acme" request strip 2 } location * { block return 302 "https://xyz.com$REQUEST_URI" } } server "xyz.com" { listen on * tls port 443 hsts preload hsts subdomains tls { certificate "/etc/ssl/xyz.com.fullchain.pem" key "/etc/ssl/private/xyz.com.key" } location "/.well-known/acme-challenge/*" { root "/acme" request strip 2 } location "/xyz/*" { root "/" fastcgi } } *************************************************************** www# dmesg OpenBSD 6.5 (GENERIC.MP) #84: Wed Apr 17 05:53:43 MDT 2019 dera...@arm64.openbsd.org:/usr/src/sys/arch/arm64/compile/GENERIC.MP real mem = 961462272 (916MB) avail mem = 903159808 (861MB) mainbus0 at root: Raspberry Pi 3 Model B Rev 1.2 cpu0 at mainbus0 mpidr 0: ARM Cortex-A53 r0p4 cpu0: 32KB 64b/line 2-way L1 VIPT I-cache, 32KB 64b/line 4-way L1 D-cache cpu0: 512KB 64b/line 16-way L2 cache efi0 at mainbus0: UEFI 2.7 efi0: Das U-Boot rev 0x20190100 apm0 at mainbus0 simplefb0 at mainbus0: 656x416, 32bpp wsdisplay0 at simplefb0 mux 1 wsdisplay0: screen 0-5 added (std, vt100 emulation) simplebus0 at mainbus0: "soc" "dma" at simplebus0 not configured bcmintc0 at simplebus0 bcmdog0 at simplebus0 "cprman" at simplebus0 not configured bcmrng0 at simplebus0 "mailbox" at simplebus0 not configured "gpio" at simplebus0 not configured pluart0 at simplebus0 "mmc" at simplebus0 not configured "dsi" at simplebus0 not configured bcmtemp0 at simplebus0 bcmaux0 at simplebus0 com0 at simplebus0: ns16550, no working fifo com0: console dwctwo0 at simplebus0 "local_intc" at simplebus0 not configured "mmc" at simplebus0 not configured "gpiomem" at simplebus0 not configured "firmware" at simplebus0 not configured "power" at simplebus0 not configured "fb" at simplebus0 not configured "vchiq" at simplebus0 not configured "vcsm" at simplebus0 not configured "arm-pmu" at simplebus0 not configured "virtgpio" at simplebus0 not configured "expgpio" at simplebus0 not configured simplebus1 at mainbus0: "clocks" "clock" at simplebus1 not configured "clock" at simplebus1 not configured agtimer0 at mainbus0: tick rate 19200 KHz cpu1 at mainbus0 mpidr 1: ARM Cortex-A53 r0p4 cpu1: 32KB 64b/line 2-way L1 VIPT I-cache, 32KB 64b/line 4-way L1 D-cache cpu1: 512KB 64b/line 16-way L2 cache cpu2 at mainbus0 mpidr 2: ARM Cortex-A53 r0p4 cpu2: 32KB 64b/line 2-way L1 VIPT I-cache, 32KB 64b/line 4-way L1 D-cache cpu2: 512KB 64b/line 16-way L2 cache cpu3 at mainbus0 mpidr 3: ARM Cortex-A53 r0p4 cpu3: 32KB 64b/line 2-way L1 VIPT I-cache, 32KB 64b/line 4-way L1 D-cache cpu3: 512KB 64b/line 16-way L2 cache usb0 at dwctwo0: USB revision 2.0 uhub0 at usb0 configuration 1 interface 0 "Broadcom DWC2 root hub" rev 2.00/1.00 addr 1 uhub1 at uhub0 port 1 configuration 1 interface 0 "Standard Microsystems product 0x9514" rev 2.00/2.00 addr 2 smsc0 at uhub1 port 1 configuration 1 interface 0 "Standard Microsystems SMSC9512/14" rev 2.00/2.00 addr 3 smsc0: address b8:27:eb:fd:e2:73 ukphy0 at smsc0 phy 1: Generic IEEE 802.3u media interface, rev. 3: OUI 0x0001f0, model 0x000c umass0 at uhub1 port 3 configuration 1 interface 0 "HP v222w" rev 2.00/11.00 addr 4 umass0: using SCSI over Bulk-Only scsibus0 at umass0: 2 targets, initiator 0 sd0 at scsibus0 targ 1 lun 0: <hp, v222w, 1100> SCSI2 0/direct removable serial.03f03f40AA0000000444 sd0: 7680MB, 512 bytes/sector, 15728640 sectors vscsi0 at root scsibus1 at vscsi0: 256 targets softraid0 at root scsibus2 at softraid0: 256 targets bootfile: sdboot device: sd0 root on sd0a (fb256b8cc93eac04.a) swap on sd0b dump on sd0b WARNING: CHECK AND RESET THE DATE! umsm0 at uhub1 port 4 configuration 1 interface 0 "HUAWEI HUAWEI Mobile" rev 2.00/1.02 addr 5 umsm1 at uhub1 port 4 configuration 1 interface 1 "HUAWEI HUAWEI Mobile" rev 2.00/1.02 addr 5 umsm0 detached umsm1 detached umsm0 at uhub1 port 4 configuration 1 interface 0 "HUAWEI HUAWEI Mobile" rev 2.00/1.02 addr 5 ucom0 at umsm0 umsm1 at uhub1 port 4 configuration 1 interface 1 "HUAWEI HUAWEI Mobile" rev 2.00/1.02 addr 5 ucom1 at umsm1 umsm2 at uhub1 port 4 configuration 1 interface 2 "HUAWEI HUAWEI Mobile" rev 2.00/1.02 addr 5 ucom2 at umsm2 umass1 at uhub1 port 4 configuration 1 interface 3 "HUAWEI HUAWEI Mobile" rev 2.00/1.02 addr 5 umass1: using SCSI over Bulk-Only scsibus3 at umass1: 2 targets, initiator 0 cd0 at scsibus3 targ 1 lun 0: <HUAWEI, Mass Storage, 2.31> SCSI2 5/cdrom removable umass2 at uhub1 port 4 configuration 1 interface 4 "HUAWEI HUAWEI Mobile" rev 2.00/1.02 addr 5 umass2: using SCSI over Bulk-Only scsibus4 at umass2: 2 targets, initiator 0 sd1 at scsibus4 targ 1 lun 0: <HUAWEI, SD Storage, 2.31> SCSI2 0/direct removable www#