Looks like this problem persists in RouterOS 5.26 on my routerboard 751U-2HnD. Web-proxy disabled, wireless, ipv6, hotspot, mpls packages are disabled too. There is additional Ntp package working. Using dhcp-server, ntp-server, firewall (filter, NAT, mangle, address-lists), bridges, PPPoE clients, and PPTP server. The problem disappearing sometimes for a few days by itself, but then returned (maybe due to increasing connections count and, thereby, more RAM utilising). Often the CPU becomes so busy that router stops responding at all and needs rebooting. I’ve set up the watchdog and it helps to do it automatically (thank you for it). But nevertheless the work going bad and interrupted sometimes.
How to really disable the RouterOS web-proxy?
Maybe I have to try to upgrade to RouterOS v6.18?
P.S. Sorry for flood.. Removing the “web-proxy” storage by adding new one helps with sucking CPU by flash, just after rebooting. After rebooting I’ve removed all storages of web-proxy. Now it works yet… If the flash problem will back again I’ll write more..
P.P.S. It has been back again… The problem returns when I give “/system backup> save name=” and “/>export file=” commands. I don’t know yet which of them really provokes it. But after executing this two commands the “web-proxy” store appeared again, and again it is active… and the “flash” process category started to suck CPU again (sometimes looks like it hushes, and continuing using CPU in a few minutes). I’ve deleted the store by adding new one (like I had done it first time). I shall try to reproduce it again when it will be safe to reboot my router… or when it will reboot itself.
Successfully reproduced. New “web-proxy” store creating when I give command
export file=<NameForFile>
namely when I try to export all the settings to script file.
Hmm… may some contents of the file to provoke this proxy-store-flash problem during export?
P.S. Or… maybe it happens just when I open the proxy settings window in WinBox? I’ve just looked to it to make sure that the proxy is off… I’ll try once again…
Wow.. the “web-proxy” store created and activated in both cases: on all settings export and when I just open /ip/web-proxy settings in WinBox. I triend it on two routers, RB751U-2HnD and RB750GL with RouterOS 5.26. But “flash” uses CPU greatly just on first of them. And I don’t know yet if it uses it so high after just opening that settings window… I will look more.. Maybe sometimes the router just having too few RAM (when proxy using it too) and so it uses a swap file? Has RouterOS any swap-files on routerboards?
Sorry for maybe too much waste text.. It seems to be an old issue, but I failed to google a good answer.
I still don’t know why my router hangs, I just can say that it can hang with proxy turned off and even with no “stores” at all too. “Flash” process uses CPU highly, mostly under high client load, but the traffic can be little, so I think maybe connection count or DNS cache size is the bottleneck. Sometimes it eats all the CPU time suddenly. I believe the router hangs due to “flash” process, and maybe it affected by lack of free RAM..
by the way.. it has only 32Mb of RAM. And despite of about 10Mb are free most time (it can fall to 5 and … perhaps it less when I can’t see), maybe RouterOS tries to free some amount and flushes some virtual memory to flash?
Finnallllyy some clue here - I have same situation - disabled proxy - and my routerboard hangs after random time -
When it happens “Flash” is rasing and rasing … is the only option migrating to 6… ?
I don’t believe it was really an option (unless Your router has a multikernel CPU: I’ve heard RouterOS 6 manages kernels more efficiently). I had just asked about it, but can’t say definitely or test it in the place where it happened. That router seems to work fine on some smaller loads. Finally I’ve installed another router with more RAM (old was 32MB), as I have not seen this problem on any 64MB router. After couple weeks I can say the problem successfully solved this way…