October 29, 2016
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So I was having issues getting a Windows 10 laptop running Google Chrome connected via wifi to a router running OpenWRT Chaos Calmer 15.05.1.
The Windows 10 laptop would take a long time to establish a connection and then a long time for any data to transfer at an incredibly slow rate.
At first I thought it was Google Chrome but downloaded Firefox and was still having the same issues.
There are many proposed solutions but the commands that appeared to make a magical difference and instantly speed things up were:
netsh interface tcp show global
netsh interface tcp set global autotuning=disabled
At this stage things did not magically get better.
Then I tried:
netsh interface tcp show heuristics
netsh interface tcp set heuristics enabled
Now the Internet suddenly got quicker.
To undo these changes (if they don’t work for you):
netsh interface tcp set global autotuning=normal
netsh interface tcp set heuristics disabled
Also, because I messed around with the MTU on the WiFi interface I had to run the following to restore things to a relatively normal default:
netsh interface ipv4 set subinterface “WiFi” mtu=1458 store=persistent
October 28, 2016
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I wanted to add a Huawei E160E USB 3G modem to OpenWRT but had some trouble getting it to work.
I used documentation from three places:
In this case I used a latest snapshot from the LEDE project. It turns out the router would simply lose networking, I’d be unable to SSH or access it via the web, after several minutes. Perhaps this was because I was forcing kmod’s with a slightly incompatible kernel. In the end I went back to Chaos Calmer 15.05.1 from OpenWRT which seemed to be more stable for me.
It turned out that I needed to add some more packages, specifically:
- usbutils – to run “lsusb” to see when my USB devices had been detected
- kmod-usb-uhci – ultimately I needed a kmod to see the USB controller in order to detect attached devices
- kmod-usb2 – just in case the UHCI controller module above didn’t work
Note that when adding kmods then opkg might reject it with a LEDE build if package slightly out of sync with the kernel build,
in which case use –force-depends (don’t do this, it might result in an unstable router):
opkg install --force-depends kmod-usb-uhci
Now, also ensure that the /etc/modules.d/usb-serial has the following line:
usbserial vendor=0x12d1 product=0x140c maxSize=4096
The vendor and product values are taken from the output of lsusb:
Bus 001 Device 002: ID 12d1:140c Huawei Technologies Co., Ltd. E180v
Once connected the signal strength can be obtained on the command line by running:
# comgt -d /dev/ttyUSB3
Waiting for Registration..(120 sec max)
Registered on Home network: "50502",2
Signal Quality: 13,99
The result can be looked up in the table at this link:
October 12, 2016
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So you’ve logged into your MyGov website and you’re attempting to add a Medicare service using a linking code that Medicare has provided you.
You’re confronted with a webpage like this:
Enter your linking code:
Select one of the online services you want to link:
Enter your agency reference number for this online service (no spaces):
Your linking code is straightforward. It is what you were provided with (e.g. G12345678).
The online service you want to link is “Medicare”.
The agency reference number, however, is tricky. It is your 10 digit Medicare card number and your individual reference number without a gap. But what does this mean?
Your Medicare card number is the 10 digits along the top of the card. The individual reference number is the single digit next to your name underneath.
Use the 10 digits from the top plus the single digit next to your name
So the filled out form will look something like (for this example card):
Entering linking information for MyGov and Medicare
Good luck! And if you have a problem you’ll have to call Medicare (not MyGov) on 132011, it took my 19 minutes to get through to an operator.
October 9, 2016
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The Netgear Wireless Cable Gateway model CGD24N supplied by Bigpond in Australia can spend a second life as a simple Ethernet switch. However it assigns DHCP addresses out of the box which can really upset a home network if you’re not expecting it.
Your wireless router might be assigning addresses from one range but you keep finding guest devices assigned something from the 192.168.100.0/24 range.
It’s not that straightforward to find the DHCP on/off switch. The steps to find it are thus:
1. Log in to gateway admin interface, select NAT from menu
Select NAT from menu on left-hand side
2. Turn NAT on, click apply
Select NAT on checkbox, click apply
3. Select LAN IP from left hand menu
Select LAN IP from left hand menu
4. Select DHCP no radio button, click apply
Select DHCP no radio button, click apply