Or these are VPS', and not physical Servers. >From my brief encounters with various VPS technologies, this makes more sense.
Regards, Kieran. On Tue, Dec 22, 2009 at 12:51 PM, Bruce Forster <br...@tubes.net.au> wrote: > I should add; i guess i made some assumption that you were co-locating your > own servers with someone, if this isn't the case, please ignore everything > i'v said ;) > > > -bruce > > -----Original Message----- > From: Truman Boyes [mailto:tru...@suspicious.org] > Sent: Tuesday, 22 December 2009 10:47 PM > To: Deric Kwok > Cc: Bruce Forster; nanog@nanog.org > Subject: Re: how it routes and network question > > Hi, your "hosting company" is likely NAT'ing or using load balancers on the > front end. You are obviously not "reaching" those machines by ssh'ing into > 192.168.x.x... Additionally, assuming that DHCP is handing out that address > on the server that mask would likely not be all ones. > > Even Amazon EC2 instances use private addresses now on the backend ... > > Kind regards, > Truman > > > On 22/12/2009, at 11:31 PM, Deric Kwok wrote: > > > Hi Bruce > > > > Thank you so much to explain me in detail. I would like to know about > > this it in case i can get another hosting company > > > > Yes. I think the netmask should be 255.255.255.255 > > 1/ but why they are using this netmask setting? save ip address? > > then does the router handle many routes in this setting? > > 2/ What is this advantage for the hosting company? > > 3/ If I need more ip in the same server, how it works? > > 4/ Why you said the hosting company is cheap to use this configuration? > > > > Thank you again. > > > > > > > > > > > >> > >> <SNIP> > >> 2/ lf the network card in server has problem and need change another > >> one, will my ip address change to another ip address also? > >> </SNIP> > >> Yeah well thats how dhcp works, via ma caddy, i guess you can always > spoof > >> your old mac address. > >> > >> <SNIP> > >> 3/ why hosting company is using /32 and dhcp? what is advantage? ls it > >> easy for administration? > >> </SNIP> > >> Im guessing because the users are to stupid to understand what a subnet > >> mask/gateway is its just easier to get the mac address and assign it to > a > >> user then let the user assign a ip. > >> > >> > >> Normally in a co-location setup its not like this, inless its very cheap > >> hosting. > >> > >> My co-location has the following setup, and this is how MOST networks > should > >> be run. > >> > >> Core router using BGP to transit providers, and other local peers. > >> Switched network useing ospf to handle the routes and also VLAN's for > the > >> customers subnets. > >> > >> So customer should get a vlan assigned to them (which they have no need > to > >> know what the number is, they are handed a access mode port. > >> Customers also issued a /30 (at least) in most cases a customer will get > a > >> /29 or /28 depending on what they need. > >> In this case of a /30 its a total of 3 address's > >> 1, GATEWAY (put on the ISP/HOST switch > >> 2, IP ADDRESS FOR SERVER TO USE > >> 3, BROADCAST ADDRESS. > >> > >> Heres an eg of a /30: > >> > >> Address: 192.168.1.1 11000000.10101000.00000001.000000 01 > >> Netmask: 255.255.255.252 = 30 11111111.11111111.11111111.111111 00 > >> Wildcard: 0.0.0.3 00000000.00000000.00000000.000000 11 > >> => > >> Network: 192.168.1.0/30 11000000.10101000.00000001.000000 00 > >> HostMin: 192.168.1.1 11000000.10101000.00000001.000000 01 > >> HostMax: 192.168.1.2 11000000.10101000.00000001.000000 10 > >> Broadcast: 192.168.1.3 11000000.10101000.00000001.000000 11 > >> Hosts/Net: 2 Class C, Private Internet > >> > >> > >> Heres an eg of a /29: > >> > >> the % ipcalc 192.168.1.1/29 > >> Address: 192.168.1.1 11000000.10101000.00000001.00000 001 > >> Netmask: 255.255.255.248 = 29 11111111.11111111.11111111.11111 000 > >> Wildcard: 0.0.0.7 00000000.00000000.00000000.00000 111 > >> => > >> Network: 192.168.1.0/29 11000000.10101000.00000001.00000 000 > >> HostMin: 192.168.1.1 11000000.10101000.00000001.00000 001 > >> HostMax: 192.168.1.6 11000000.10101000.00000001.00000 110 > >> Broadcast: 192.168.1.7 11000000.10101000.00000001.00000 111 > >> Hosts/Net: 6 Class C, Private Internet > >> > >> Hope this makes sence. > >> > >> Regards, > >> > >> Bruce > >> > >> > >> > > > > > >
