Trials and errors given me following list of ports to be open in guest wi-fi firewall in order for WhatsApp calls to work.
Until then it was giving error “Call couldn’t be placed due to wi-fi network that prevents WhatsApp calls”.
TCP: 4244,5222,5223,5228,5242
UDP: 3478,45395
After SIP firmware update to version 9.3 on my Cisco 7945G and 7965G phones they all stopped to register with Asterisk. They did load config from tftp and then just stayed with “Registering” on screens forever.
What caused it is dropped UDP support in new version of SIP firmware and one required update to SEP{MAC}.xml config files, so, make following changes and may the force be with you:
sip.conf:
tcpenable=yes
SEP{MAC}.xml (in each <line button=”N”> section):
<proxy>USECALLMANAGER</proxy>
Configuring appropriate default calendar permissions globally in an Exchange environment can be accomplished for Exchange 2000, 2003 or 2007 with a handy tool called PFDAVadmin found here.
The Exchange 2007 commandlet Set-MailboxCalendarSettings only works for resource mailboxes and won’t accomplish what PFDAVadmin can for calendar client permissions. The only commandlet currently that mirrors this capability simply retrieves client permissions on public folders Get-PublicFolderClientPermission
With PFDAVadmin, you have two options:
My Citrix XenServer pool is powered through network enabled APC Smart-UPS (6000 RT)
There are at least two ways of monitoring UPS state in order to shutdown pool members and VMs running in the pool when juice is over:
– apcupsd (installation used to be somewhat tricky before XenServer 5.6 and included some unsupported movements)
– getting values from UPS via SNMP and acting accordingly to them – the way which I went, and you’re welcome to see detailed route description.
if you are running Squid on or behind you Linux gateway here’s HowTo transparently run all outgoing HTTP through it
Dammit, two hours worth of log and configurations mining gave pretty unexpected results.
Not really obvious (until you find it) that on the way to fix offline address book download error 0x8004010F, you first need to make sure that error 0x80004005 is fixed. But it’s common for MS products, you know what you’re buying…
Had this mix working smoothly for couple of years. But recent migration of proxy server to the virtualized Ubuntu server caused strange behavior – sites which are using advanced web techniques (gmail, hotmail etc.) started to show empty pages without any tracks in log files. After some research I had to shoot down TCP window scaling which is enabled by default and decrease mtu to 1400. Full configuration after the break.
