In message <201210222307.q9MN7AIv063740@aurora.sol.net>, Joe Greco writes:
d be considered invalid. When you have a pool of assignable addresses, you = should expect to see x.x.x.0 and x.x.x.255 in passing traffic (ie. VIP or N = AT pool, or subnets larger than /24). Yet I've run into a commercial IP mgm = t product and getting reports of M$ ISA proxy that is specifically blocking = traffic for an IP ending in .0 or .255.
To make a long story short:
If it's a product you're considering buying, problems with .0 and .255 reflect on the competence of the product's designers. You can safely assume that there are many other Severely Broken Things too and move on to saner products.
For general Internet use, there is a lot of gear out there that's ten or more years old. You should avoid using .0 and .255 addresses if you can avoid it, though it's a shame to waste valid IP space to accommodate the brokenness of someone else's stuff.
Ten year old equipment should be CIDR aware. It's not like it CIDR wasn't in wide spread using in 2002.
Some of us park stuff on .0 and .255 addresses in order to motivate others to change.
... JG -- Joe Greco - sol.net Network Services - Milwaukee, WI - http://www.sol.net "We call it the 'one bite at the apple' rule. Give me one chance [and] then I won't contact you again." - Direct Marketing Ass'n position on e-mail spam(CN N) With 24 million small businesses in the US alone, that's way too many apples.
-- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka@isc.org