<p>Try changing it to <code>rpcallowip=192.168.0.0/24</code>. Wildcard support was removed from <code>bitcoind</code>, more on reasoning here:</p>

<p><a href="https://github.com/bitcoin/bitcoin/pull/4102" rel="nofollow">https://github.com/bitcoin/bitcoin/pull/4102</a> </p>

<p><code>rpcallowip=192.168.0.0/24</code>is <a href="http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing" rel="nofollow">CIDR</a> notation that is functionally the same as <code>192.168.1.*</code>.</p>

CC BY-SA 3.0
2015-06-02T13:14:40.963Z
2015-06-02T13:14:40.963Z
JohnDvorak
<p>I had the same problem. What worked for me was opening username/%appdata%/roaming/bitcoin. Then opened bitcoin.config with notepad. I changed rpcallowip=192.168.0.* to rpcallowip=192.168.0.1/24</p>

<p>I'm still very new to all this. This might not be your problem, but that's what I did to remove that error. </p>

CC BY-SA 3.0
2015-06-02T02:56:00.590Z
2015-06-02T16:22:36.790Z
2015-06-02T16:22:36.790Z
Sgtpowder
<p>I mine for fun. Please no responses saying "You really shouldn't mine on that computer. At all. Forget mining exists."</p>

<p>Whenever I try to mine using the instructions given in the README of the GUIMiner, it gives me an error as soon as the bitcoin.exe launches as a server.</p>

<p>Here's the error:</p>

<p>Invalid -rpcallowip subnet specification: *. Valid are a single IP (e.g. 1.2.3.4), a network/netmask (e.g. 1.2.3.4/255.255.255.0) or a network/CIDR (e.g. 1.2.3.4/24).</p>

CC BY-SA 3.0
2015-06-02T02:11:10.580Z
So, what value did you specify for `-rpcallowip`? Does it match one of the listed valid patterns?
Greg Hewgill
CC BY-SA 3.0
2015-06-02T02:16:58.413Z
Shouldn't it be localhost?
DSGWubsy
<solo-mining><error><guiminer>
Having trouble solo mining
DSGWubsy
# Having trouble solo mining

(Asked by: username_0 on 2015-06-02)

I mine for fun. Please no responses saying "You really shouldn't mine on that computer. At all. Forget mining exists."

Whenever I try to mine using the instructions given in the README of the GUIMiner, it gives me an error as soon as the bitcoin.exe launches as a server.

Here's the error:

Invalid -rpcallowip subnet specification: \*. Valid are a single IP (e.g. 1.2.3.4), a network/netmask (e.g. 1.2.3.4/255.255.255.0) or a network/CIDR (e.g. 1.2.3.4/24).

**Tags:** solo-mining, error, guiminer

> **Comments:**
> **username_1**: So, what value did you specify for `-rpcallowip`? Does it match one of the listed valid patterns?  
> **username_0**: Shouldn't it be localhost?  

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## 2 answers

### Answer by username_2 on 2015-06-02. Score: 2

Try changing it to `rpcallowip=192.168.0.0/24`. Wildcard support was removed from `bitcoind`, more on reasoning here:

<https://github.com/bitcoin/bitcoin/pull/4102>

`rpcallowip=192.168.0.0/24`is [CIDR](http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing) notation that is functionally the same as `192.168.1.*`.


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### Answer by username_3 on 2015-06-02. Score: 0

I had the same problem. What worked for me was opening username/%appdata%/roaming/bitcoin. Then opened bitcoin.config with notepad. I changed rpcallowip=192.168.0.\* to rpcallowip=192.168.0.1/24

I'm still very new to all this. This might not be your problem, but that's what I did to remove that error.


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