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June 16, 2014

Citrix XenServer XS62E015 update failing to apply

If you’re using XenServer 6.2, you may have some problems installing the XS62E015 update from CTX140808. You go through the normal update procedure – download XS62E015.zip from the CTX140808 Citrix knowledge base article, extract it and upload the XS62E015.xsupdate file to the pool, then apply UUID c8b9d332-30e4-4e5e-9a2a-8aaae6dee91a to the pool, which promptly fails with: The uploaded patch file is invalid....

Citrix XenServer Comments: 0

June 8, 2014

Misleading companies – part 3

The final part of my rant (see part 1 featuring ConnetU and part 2 featuring IX Reach as well as euNetworks) is all about C4L (A.K.A. Connexions4London), a company who are trying to take the take the practice of claiming to have PoPs which don’t really exist to a whole new level! I should start this with a disclaimer. I...

General Comments: 0

June 8, 2014

Misleading companies – part 2

In part 1, I wrote about my experiences looking for IP transit services in Telehouse West and an annoying encounter with ConnetU over a phantom PoP. Part 2 of this rant covers a second requirement from the same project – this time for a pair of 1Gbps layer 1 (wavelength) or layer 2 (MPLS pseudo-wire or VPLS) circuits between two...

General Comments: 0

June 8, 2014

Misleading companies – part 1

Something that I’ve never understood is why some companies feel the need to lie on their websites. I’m not talking about ambiguous marketing twaddle about being “a leading provider” etc. but flat out deception. This seems to be particularly prevalent in the hosting/network/data centre industry for some reason. This specific rant was triggered by a recent project which required an...

General Comments: 0

May 14, 2014

Twitter integration not working in WHMCS

If you’re having problems with WHMCS’s Twitter integration feature on a CentOS/RHEL server, then chances are that you need to install the php-xml RPM. The Twitter integration in WHMCS uses jQuery to make a POST request to announcements.php detailing the number of tweets to retrieve. This then in turn connects to the Twitter API, parses the response and returns it...

WHMCS Comments: 0

February 1, 2014

eBay and PayPal DNS hijacked by Syrian Electronic Army

Earlier today, the nameservers on the ebay.co.uk and paypal.co.uk domain were changed to ns1.dnforu.com and ns2.dnforu.com in an apparent hijack. It seems that the Syrian Electronic Army are now claiming responsibility for this on Twitter. They have posted screenshots of the eBay/PayPal MarkMonitor account where they were able to manage the domains in question as well as seemingly had access...

Security Comments: 0

January 18, 2014

Tags used by OWASP CRS ModSecurity rules

I couldn’t find a definitive list of the tags used by the OWASP CRS ModSecurity rules, so after a bit of faffing around, here’s what I’ve come up with for the “base” rules in OWASP CRS version 2.2.9 (current at the time of writing). I’ve tried to group them together as best I can: Web Attack: OWASP_CRS/WEB_ATTACK/XSS OWASP_CRS/WEB_ATTACK/DIR_TRAVERSAL OWASP_CRS/WEB_ATTACK/RFI OWASP_CRS/WEB_ATTACK/COMMAND_INJECTION...

ModSecurity Comments: 0

January 11, 2014

XenConvert fails to import OVF to XenServer

I recently ran into a problem when trying to P2V a server with the Citrix XenConvert tool. XenConvert would successfully create the local VHD file for the disk image as well as the OVF file for the server and then copy them to XenServer, however at the vert last hurdle (actually importing the OVF into XenCenter), it would then fail...

Citrix XenServer Comments: 0

January 2, 2014

OpenVZ reboot loop

I recently encountered a strange reboot loop with a server running OpenVZ. When booting the server, the host would come up and start the process of booting the containers, then at some point during the boot process it would reboot without any errors. I managed to break the reboot loop by quickly SSHing in to the host node whilst it...

OpenVZ Comments: 0

January 2, 2014

cPanel breaking Dovecot in 11.40

Recently I’ve had a couple of cases where cPanel randomly breaks Dovecot with one of the cPanel 11.40.x updates. In one of these cases, cPanel actually uninstalled the Dovecot RPM as part of the automated, overnight upcp process! In the other cases, Dovecot was still running and accepting connections, but POP3/IMAP clients were getting messages that their passwords were wrong....

cPanel/WHM