Netmasks for dummies 3010
Moe Trin prg reference of wrong Well, it was just a comment on the age of the RFCs you mentioned and the apparent concern they...
I'm sorry - why do you have to reach so far to show this? What's wrong with just doing '-sbin-route -n grep ^127'?
As far as the external user is concerned, the masks really don't matter that much. "You" don't have nitty-gritty access to "my" network, and what bizarre subnetting scheme "I" happen to be using doesn't matter as long as "your" packet gets to the host "you" are trying to connect to. On the other hand, if "I" want to buy hard-software from "your" company, "I" may run into a buzz saw - but that's an issue between "your" sales-weasel and "my" purchasing dude.
CIDR was a band-aid response to the "sky is falling^W^W^Wrunning out of IP space next year" problem that was set up by the extravagant way of allocating space back then. Still
compton ~$ zgrep Reserved rfcs-ipv4-address-space.01.27.05.gz cut -d' ' -f1 egrep -v '(0001272450-9)' column 001-8 037-8 077-8 094-8 102-8 110-8 118-8 175-8 183-8 223-8 002-8 039-8 078-8 095-8 103-8 111-8 119-8 176-8 184-8 005-8 041-8 079-8 096-8 104-8 112-8 120-8 177-8 185-8 007-8 042-8 089-8 097-8 105-8 113-8 121-8 178-8 186-8 023-8 073-8 090-8 098-8 106-8 114-8 122-8 179-8 187-8 027-8 074-8 091-8 099-8 107-8 115-8 123-8 180-8 189-8 031-8 075-8 092-8 100-8 108-8 116-8 173-8 181-8 190-8 036-8 076-8 093-8 101-8 109-8 117-8 174-8 182-8 197-8 compton ~$
and that doesn't even include the holes in the buttigned blocks.
Oh, and a little heads up people - NOTICE THAT 124-7 and 126-9 HAVE BEEN ALLOCATED. I don't know of any buttignments there yet, but that will be soon enough.
Again, for an external user, this is rarely a problem. Your computer knows the local networks, and knows to toss the other packets at the default gateway. It's those poor sods running the backbone that have to worry about the tons of different network blocks out there. Lessee,
compton ~$ zcat IP.ADDR-stats-ALR*gz wc -l 65948 compton ~$
There are 66,000 networks buttigned. How many of those are SWIPs I have no idea. Just as we no longer have to worry about having a master hosts file from SRI every time someone moves a computer, we also don't have to worry about 'do I take that left turn in Albuquerque or not?'.
Yes
That wasn't the point of Linux. The point of its creation was that Linus Torvalds wanted to...
Yes, but only such that what is visible from your border router is correct. As you say
That's the whole point. No one really knows (or likely - cares) what you are doing on your network, as long as what they can see from outside (meaning connecting to some host) is seamless. Within your fiefdom, there may be hell to pay, but that's your problem.
Yeah, I see that all to often. I see a number of allocations of ten addresses, which I suppose makes sense to the sales-droid, but is a severe pain in the posterior. By the way, it's not just the ISP. The RIRs have been known to do things like
Juha Siltala Torvalds but I Linux Minix Indeed. And at the time, SCO had no free home use license, and I don't recall anyone else offering...
compton ~$ zgrep -E ' (3648) ' IP.ADDR-stats-ALR*gz IP.ADDR-stats-RIPE.gz:DE 194.9.126.208 48 buttigned IP.ADDR-stats-RIPE.gz:PL 194.9.166.80 36 buttigned compton ~$
Well, Marketing had these leftovers from another hair-brained sale...
While some company could probably pay me enough to handle the supplementary bar bill, I don't think my kidneys could handle it.
Old guy
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