.pQd

OVH, failover IPs, IPv6, VMs

by .pQd
at work we rent a dedicated server from OVH; except unexplained openvpn throttling all is working pretty well for the price we pay. besides primary IPv4 address OVH can provide few additional ‘failover’ IPv4 addresses and /64 IPv6 subnet. in our setup some of IPv4s and IPv6s are routed to a KVM VM. below – ... Read More

Jeczmyk – Idee za wielkie pieniądze

by .pQd
https://www.youtube.com/watch?v=7zPdd1adl-A cos czuje ze bedzie kolejny keyword do wyszukiwania i sluchania. dobrze prawi, nawet jest o moim ulubionym ‘kongresie futurologicznym’ lema.

idrac7 + ipmitool stopped working with firmware 1.56.55

by .pQd
i use ipmitool to check health of the poweredge servers from nagios. in essence i execute: and alert if the exist code is non-zero, then i execute and again – i alert on non-zero exit code, i also grep the file in search of lines not containing ok/ns. this was working fine for DRAC 5 ... Read More

Samsung CLX-4195FW – displaying only samsung logo on the front screen

by .pQd
newly arrived Samsung CLX-4195FW greeted me with just blue samsung’s logo on the white background presented on the front LCD screen; at the same time printer correctly acquired IP via DHCP and i could access the management interface via the network. i’ve called Samsung 3x and luckily enough at the 3rd attempt i spoke with ... Read More

mac changing on DW1501 wifi card

by .pQd
in dell’s e6220 that i use for work travels i have dw1501 wifi card. in theory it’s possible to change card’s MAC address in the control panel > network and sharing center > change adapter settings > wireless network connection > properties configure > advanced > locally administered MAC address. problem is the values i’ve ... Read More

Dell PowerEdge T20

by .pQd
i’ve bought 2x Dell PowerEdge t20 – they’ll serve as HA pair of routers/vpn endpoints/file servers for a new office. it was the first time i played with intel amt. it’s not bad but neither perfect.

around Gran Canaria

by .pQd
i’ve spent 2 weeks at the beginning of March at Gran Canaria. below – list of the more interesting walking trails we’ve taken.

open maps + own routes

by .pQd
over time open street maps got better and better; i started to rely on them more than on google maps when hiking around – osm gave me more detailed maps of hiking trails in Barcelona and Singapore, Las Palmas and Slovenia. i wanted to share some of the interesting paths here; the best i could ... Read More

sphinx text search – sorting the results by relevancy

by .pQd
a while ago i helped a colleague with moving away from mysql-based text search based on MATCH .. AGAINST to sphinxsearch to improve the performance. without much surprise this helped a lot to improve the response time. recently i was asked to take a look at the setup again and see if we can do ... Read More

openvpn throttled from ovh’s bhs datacenter?

by .pQd
for work we rent a dedicated server from OVH. it’s been 5 months now and i’m pretty satisfied with the service provided. at the initial stage we’ve bumped into a problem that was never really solved; i cannot be even 100% sure if it’s OVH’s fault. UDP-based OpenVPN connection established from OVH’s BHS datacenter to ... Read More

wordpress hangs when uploading an image

by .pQd
i’ve moved my wordpress to a new server few weeks ago. all appeared to work fine but i forgot changing the configuration and providing new upload dir path. result? the media page [ wp-admin/upload.php ] did not open and apache2 appeared to be hanged using 100% cpu. i could not add any media in the ... Read More

hk, mc, sg, my

by .pQd
some walking trails i’ve taken during my last trip to Hong Kong, Macau, Singapore, Malaysia.

clipboard service, rdp

by .pQd
did the clipboard suddenly stopped passing text between your local computer and the remote desktop session? the first thing i do in such case is: start the task manager on the remote host go to processes, find rdpclip.exe and kill it start again rdpclip.exe on the remote host and try copy and paste again

30c3

by .pQd
talks from 30c3 that i’ve found interesting: technical and political https://www.youtube.com/watch?v=HTVgPw7TR_k – Seeing The Secret State: Six Landscapes http://www.youtube.com/watch?v=txRdOjgokQ4 – Backdoors, Government Hacking and The Next Crypto Wars http://www.youtube.com/watch?v=BMwPe2KqYn4 – Through a PRISM, Darkly – Everything we know about NSA spying https://www.youtube.com/watch?v=vILAlhwUgIU – Jacob Applebaum: To Protect And Infect https://www.youtube.com/watch?v=7HXLaRWk1SM – CounterStrike – Lawful Interception ... Read More

squeezing water out of jepgs, pngs

by .pQd
jpegoptim can reduce size of JPG files. if used without -m option it’s lossless. apt-get install jpegoptim find . -type f -exec jpegoptim -m80 {} ‘;’ for pngs there are few tools out of which i found pngcrush to give best results. unfortunately it does not work ‘in-place’ and temporary file needs to be created ... Read More

pigz –rsyncable, rdiff

by .pQd
i’m backing up in total ~90GB of mysqldumps each night. the more data, the bigger pain it is.