Thanks for your thoughts, Jan.
I had a static IP for several years when it came free with the ISP. I then
switched to BT for my ISP and had a dynamic IP, but it seemed to take longer to
start any web connection, something that I put down to the system needing
start the IP system (or something like that).
So, when I moved to a new ISP, a Co-operative which is £20 a month cheaper than
BT, and found that it would let me have a static IP for 50p a month I thought
I’d try it. It works fine so far, now that I’ve set up my gateway properly.
Chris
> On 24 Sep 2017, at 20:22, Jan Steinman <Jan@xxxxxxxxxxxxxx> wrote:
>
>>
>> Yesterday I switched to a static IP address (on the WAN, not my LAN) and
>> this morning, after switching on my gateway everything is very slow. The BBC
>> website appeared swiftly enough, but any link on that page was slow or
>> stationary.
>
> Is there any reason in particular that you think you need a static IP?
>
> In general, it’s A Bad Idea(TM), unless you are running your own Internet
> server with multiple services. It gets even trickier if you are running a
> static IP in combination with other devices that use dynamic IPs and/or local
> (non-routed) IPs.
>
> One problem is often with too-long “time to live” on DNS servers and stale
> routing tables. Everyone between you and what you are trying to access have
> to flush you from their routing tables. It should resolve, over time, but if
> you ISP then changes your dynamic IP block, you will see the routing issue
> come up again.
>
> You really need to provide your own authoritative reverse-DNS record for the
> static IP, which makes things more complicated, too. There are lots of sites
> that won’t talk to you unless you have a proper reverse-DNS record.
>
> I’ve had at least one static IP since the 90s, and it is a pain in the butt
> that I would not consider, except that I also run my own web server, mail
> server, DNS server, VPN server, and other special services.
>
> I’m currently tracking down a problem where, every few weeks, all my dynamic
> IPs and local IPs stop working (the static IP continues to work), at which
> point, re-starting the ISP’s router fixes things, but it takes my static
> server “off the air” for several minutes while it re-boots. This seems to
> happen when my ISP changes my DHCP block. I try to explain that they need to
> flush the routing tables when they do that, but then someone in India tells
> me to turn it off and then on again. :-(
--
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