[OpenIndiana-discuss] OpenSolaris and dynamic DNS

[Gary Gendel]

On 2/9/11 5:56 AM, Matt Connolly wrote:
> On 08/02/2011, at 6:16 AM, Gary Gendel wrote:
>
>    
>> Thanks for all the responses.  Indeed, I've already replaced my cron script.
>>
>> On 2/7/11 11:08 AM, Dave Miner wrote:
>>      
>>> On 02/ 7/11 10:43 AM, Gary Gendel wrote:
>>>        
>>>> Something that someone mentioned in passing triggered a thought.
>>>>
>>>> My server gets it's ip address via DHCP from my ISP.  Currently I have a
>>>> cron job that queries the address and, if it changed, update a DNS
>>>> server externally.  This way I can use mail and web services external to
>>>> my network.
>>>>
>>>> Can I replace the cron job with a trigger from the dhcp client when it
>>>> gets a new IP address instead?  Is this possible with the current dhcp
>>>> client or a replacement?
>>>>
>>>>          
>>> dhcpagent(1M) describes the eventhook mechanism built into the DHCP client.  It's meant for exactly these sorts of uses.
>>>
>>> Dave
>>>        
> That's good to know. I've been using "ddclient-3.7.3" for many months now on a cron schedule. In my case though, I have a router which gets the dynamic IP address and uses port mapping to expose only specific ports of my server to the internet, so I don't think I can make use of that at present...
>
> -Matt
>    
I had a similar setup for many many years.  About 4 months ago my ZyWall 
router was showing it's age with a lot of "NAT table full" messages and 
it would get knocked offline often.  Because my Sunfire V20z had dual 
NICS, I set it up as my firewall/NAT/router plus a DHCP server which is 
why this option became feasible.  I haven't looks back at the ZyWall 
appliance since.