Can't get bitcoind to accept RPC connections from other machines

I'm running bitcoind on a headless Debian 6.0 machine with the following bitcoin.conf, and the option '-daemon'

Code:

rpcuser=bitcoinrpc
rpcpassword=randompassword

It is successfully communicating with other nodes (currently 8 connections, and it has 229376 blocks). It is listening on ports 8332 and 8333:

Code:

user@server:~$ netstat -lp | grep bitcoind
tcp 0 0 localhost:8332 *:* LISTEN 32153/bitcoind
tcp 0 0 *:8333 *:* LISTEN 32153/bitcoind
tcp6 0 0 localhost:8332 [::]:* LISTEN 32153/bitcoind
tcp6 0 0 [::]:8333 [::]:* LISTEN 32153/bitcoind

As you can see, the RPC port (8332) is only listening for local connections, as expected. I want to modify this to allow other machines to connect. The server is behind a firewall, so a wildcard is acceptable. I have tried modifying bitcoin.conf as follows:

Code:

rpcuser=bitcoinrpc
rpcpassword=randompassword
rpcallowip=*

but with this configuration bitcoind no longer listens on 8332 ipv4 at all:

Code:

user@server:~$ netstat -lp | grep bitcoind
tcp 0 0 *:8333 *:* LISTEN 6981/bitcoind
tcp6 0 0 [::]:8332 [::]:* LISTEN 6981/bitcoind
tcp6 0 0 [::]:8333 [::]:* LISTEN 6981/bitcoind

I have also tried various combinations of the lines:

Code:

rpcallowip=*.*.*.*
rpcallowip=192.168.1.3
rpcport=8332

with the same result.

The log doesn't show any obvious reason. It includes the following lines:

Code:

Bound to [::]:8333
Bound to 0.0.0.0:8333
ThreadRPCServer started

Any ideas why bitcoind isn't listening on port 8332 when I specify rpcallowip?
I have seen this question on the forum a couple of times, but it either remains unsolved (https://bitcointalk.org/index.php?topic=159504.0), or the problem was something simple like a firewall or misspelling (http://stackoverflow.com/questions/6018304).
I would like to allow other machines on my network to connect as miners (using poclbm).