snip previous
It still all depends on your configuration, it won't look any
different than a static private IP address shows when doing an
ifconfig except it will be the public IP. Generally if you have a
static IP you will have to set it manually, and it won't get it via
DHCP. But I have worked with some DSL connections though that
assigned the static IP through a DHCP reservation based on your
modem/routers MAC address. However that would only work for a single
IP. If you get 25, you can assign those with aliases to make a
single server answer on the others as well, common for servers
hosting multiple https web sites.
Here's an example with Aliases, its from a LAN with private range,
but would look no different except IPs if it was public range
addresses. This is from my web/email server (the very one this
message comes from), the secondary IP is for running jails, when
testing upgrades.
LAN: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 9000
options=209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC>
ether 00:07:e9:09:be:4f
inet 192.168.5.1 netmask 0xffffff00 broadcast 192.168.5.255
inet 192.168.5.21 netmask 0xffffff00 broadcast 192.168.5.255
nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
media: Ethernet autoselect (1000baseT <full-duplex>)
status: active
Here's an example from a public range, pulled this from my pfSense
box, which is on a Cable Connection with a block of 5 static IP
Addresses.
vr1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=8280b<RXCSUM,TXCSUM,VLAN_MTU,WOL_UCAST,WOL_MAGIC,LINKSTATE>
ether 00:0d:b9:1c:78:2d
inet 24.240.198.186 netmask 0xfffffff8 broadcast 24.240.198.191
inet6 fe80::20d:b9ff:fe1c:782d%vr1 prefixlen 64 scopeid 0x2
nd6 options=43<PERFORMNUD,ACCEPT_RTADV>
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
There's just a single IP set, though it does relay connections on
other IPs, using proxy arp to do this so there is no need for an
alias to be defined.
So your saying the ISP forwards any internet traffic for those static
ip address to the on site "modem/router" MAC address which my service
was previsioned to?
The ISP is sending DNS port 53 and DHCP port 67 traffic on each static
ip address as well?
I can configure the on site modem/router to assign selected static ip
address to a router's hardware port which is cabled to different PC's?
The PC's would only be seeing traffic for that selected static ip address?
The rc.config statement ifconfig_xl0="DHCP" on that PC would function
as exspected?
Now if I only had a on site "modem" with a single output port, then
all the static ip address would hit the NIC card it was cabled to?
So on the single FreeBSD system with NIC xl0 being cabled to the
single port coming from the on site modem I would need ifconfig
statements in rc.conf to select what static ip address I want to use
for DHCP to automatically get the ISP's DSN ip address? Please
correct my syntax if wrong
ifconfig_xl0="DHCP,24.240.xxx.186"
If I wanted to use the remaining static ip address for other PC's on
my private LAN I would have to have additional ifconfig statements in
rc.conf?
ifconfig_xl0="alias,24.240.xxx.187,24.240.xxx.188,24.240.xxx.189"
or would I need a single statement for each alias? Please correct my
syntax if wrong.
I would also have to configure my firewall to redirect those alias
static ip address to the LAN ip address of the servers I want to target?
For some of the remaining static ip address i have not used yet, I
would like to use them for jails. Using the jail option to provide the
interface name to bound to which automatically creates an alias for
the jails ip address at jail start time and also removes it when the
jail stopped. I can do this by creating the jail using one of the
unused static ip address?
Mikel King wrote:
> Well generally DHCP and static are mutually exclusive on the same
> interface. Also bear in mind that DHCP is more comprehensive than a
> simple address assignment system. In addition a static reservation is
> not the same thing as a static IP address assignment on an interface.
> They are similar but different.
>
> A DHCP assignment will bind one address to a MAC as well as configure
> address resolution, routing et cettera… Whereas a static IP assignment
> must be configured manually by you the human and not the ISP. Your ISP
> can route a block of addresses to you via a CPE like a DSL modem or
> router but you have to configure your equipment to consume the traffic
> passed on by that device.
>
> For instance my cable provider's modem boots DHCP, as does the router
> that they configure via DHCP net boot so that it may receive the block
> of static IP addresses assigned to my account. The router itself
> consumes the first usable address as delivered by the ISP. I am free to
> assign the remain 5 addresses to any device be-it a firewall or server
> at my discretion and connect it to the LAN side of this router. The
> following is sort of what these static assignment will look like on this
> server.
>
> xl1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> ether 00:17:02:d3:84:6f
> inet 75.99.82.91 netmask 0xfffffff8 broadcast 75.99.82.95
> inet 75.99.82.93 netmask 0xfffffff8 broadcast 75.99.82.95
> inet 75.99.82.92 netmask 0xfffffff8 broadcast 75.99.82.95
> media: autoselect (100baseTX <full-duplex>)
> status: active
>
> Regards,
> Mikel King
> Senior Editor, BSD News
> http://bsdnews.net
>
>
Your talking in general terms which does not help me, I need details.
You said above "Whereas a static IP assignment must be configured
manually by you the human and not the ISP."
I tried to show this human manual configuration in my above post.
What are you purposing as human manual configuration?
I need syntax of commands used in response to my above post.
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