I came against a problem that my Yourls WordPress plugin refused to generate a short url (it timed out when publishing a post; and it sent a tweet with no url).

And when someone visited the post it tried to regenerate a new short url (and this often resulted in 4-5 short urls being created) with title “301 moved permanently”.

Overall, tracking 891 links, 93,876 clicks, and counting!

Because it took me about 10 minutes to Google it, I’ll recap it here;

If tethering is unavailable on ones iPhone, and you have to helpdesk him/her out of it, go to:

Settings > General > Network > Cellular Data Network

And set “Cellular data” to:

APN: web.be
username: web
password: web

And reboot the device… Tethering should/will be available.

Because dom0 was running NAT, and I needed bridging;

Debian network file (/etc/network/interfaces):

iface eth3 inet manual

auto xenbr0
iface xenbr0 inet static
        bridge_ports eth3
        address 10.19.86.1
        broadcast 10.19.86.255
        netmask 255.255.255.0

NAT is running on eth2, bridging on eth3 (/etc/xen/xend-config.sxp):

(network-script 'network-nat netdev=eth2')

Now, for the VM configs:

NAT:

vif         = [ 'ip=172.16.1.12,mac=00:16:3E:5E:0D:1A' ]

Bridge:

vif         = [ 'ip=85.12.6.178,mac=00:16:3E:1D:F5:6C,script=vif-bridge,bridge=xenbr0' ]

It’s magic and it works! ;)

Source.