static ip address and ifconfig

[Fbsd8]

>> 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.