DNS/用語/EDNS0/sizetest

DNS/EDNS0/sizetestについて、ここに記述してください。

https://www.dns-oarc.net/oarc/services/replysizetest

どうやって、長さを調べているか、調べてみましょう。

%dig +short rs.dns-oarc.net txt

rst.x476.rs.dns-oarc.net.
rst.x485.x476.rs.dns-oarc.net.
rst.x490.x485.x476.rs.dns-oarc.net.
"202.41.218.243 DNS reply size limit is at least 490"
"202.41.218.243 lacks EDNS, defaults to 512"
"Tested at 2011-05-17 00:52:35 UTC"

$ dig +short rs.dns-oarc.net txt

rst.x3827.rs.dns-oarc.net.
rst.x3837.x3827.rs.dns-oarc.net.
rst.x3843.x3837.x3827.rs.dns-oarc.net.
"218.41.166.43 DNS reply size limit is at least 3843"
"218.41.166.43 sent EDNS buffer size 4096"
"Tested at 2011-05-17 00:52:17 UTC"

%dnsqr txt rs.dns-oarc.net

16 rs.dns-oarc.net:
267 bytes, 1+6+0+0 records, response, noerror
query: 16 rs.dns-oarc.net
answer: rs.dns-oarc.net 60 CNAME rst.x476.rs.dns-oarc.net
answer: rst.x476.rs.dns-oarc.net 59 CNAME rst.x485.x476.rs.dns-oarc.net
answer: rst.x485.x476.rs.dns-oarc.net 58 CNAME rst.x490.x485.x476.rs.dns-oarc.net
answer: rst.x490.x485.x476.rs.dns-oarc.net 57 16 3202.41.218.243\040DNS\040reply\040size\040limit\040is\040at\040least\040490
answer: rst.x490.x485.x476.rs.dns-oarc.net 57 16 *202.41.218.243\040lacks\040EDNS,\040defaults\040to\040512
answer: rst.x490.x485.x476.rs.dns-oarc.net 57 16 !Tested\040at\0402011-05-17\04001:19:26\040UTC

%dnsq txt rs.dns-oarc.net ns00.rs.dns-oarc.net ~

16 rs.dns-oarc.net:
476 bytes, 1+1+12+12 records, response, authoritative, noerror
query: 16 rs.dns-oarc.net
answer: rs.dns-oarc.net 60 CNAME rst.x476.rs.dns-oarc.net
authority: x476.rs.dns-oarc.net 60 NS ns00.x476.rs.dns-oarc.net
authority: x476.rs.dns-oarc.net 60 NS ns01.x476.rs.dns-oarc.net
authority: x476.rs.dns-oarc.net 60 NS ns02.x476.rs.dns-oarc.net
authority: x476.rs.dns-oarc.net 60 NS ns03.x476.rs.dns-oarc.net
authority: x476.rs.dns-oarc.net 60 NS ns04.x476.rs.dns-oarc.net
authority: x476.rs.dns-oarc.net 60 NS ns05.x476.rs.dns-oarc.net
authority: x476.rs.dns-oarc.net 60 NS ns06.x476.rs.dns-oarc.net
authority: x476.rs.dns-oarc.net 60 NS ns07.x476.rs.dns-oarc.net
authority: x476.rs.dns-oarc.net 60 NS ns08.x476.rs.dns-oarc.net
authority: x476.rs.dns-oarc.net 60 NS ns09.x476.rs.dns-oarc.net
authority: x476.rs.dns-oarc.net 60 NS ns10.x476.rs.dns-oarc.net
authority: x476.rs.dns-oarc.net 60 NS ns11.x476.rs.dns-oarc.net
additional: ns00.x476.rs.dns-oarc.net 60 A 149.20.58.134
additional: ns01.x476.rs.dns-oarc.net 60 A 149.20.58.134
additional: ns02.x476.rs.dns-oarc.net 60 A 149.20.58.134
additional: ns03.x476.rs.dns-oarc.net 60 A 149.20.58.134
additional: ns04.x476.rs.dns-oarc.net 60 A 149.20.58.134
additional: ns05.x476.rs.dns-oarc.net 60 A 149.20.58.134
additional: ns06.x476.rs.dns-oarc.net 60 A 149.20.58.134
additional: ns07.x476.rs.dns-oarc.net 60 A 149.20.58.134
additional: ns08.x476.rs.dns-oarc.net 60 A 149.20.58.134
additional: ns09.x476.rs.dns-oarc.net 60 A 149.20.58.134
additional: ns10.x476.rs.dns-oarc.net 60 A 149.20.58.134
additional: ns11.x476.rs.dns-oarc.net 60 A 149.20.58.134

%dnsq txt rst.x476.rs.dns-oarc.net 149.20.58.134

16 rst.x476.rs.dns-oarc.net:
485 bytes, 1+1+12+12 records, response, authoritative, noerror
query: 16 rst.x476.rs.dns-oarc.net
answer: rst.x476.rs.dns-oarc.net 59 CNAME rst.x485.x476.rs.dns-oarc.net
authority: x485.x476.rs.dns-oarc.net 59 NS ns00.x485.x476.rs.dns-oarc.net
authority: x485.x476.rs.dns-oarc.net 59 NS ns01.x485.x476.rs.dns-oarc.net
authority: x485.x476.rs.dns-oarc.net 59 NS ns02.x485.x476.rs.dns-oarc.net
authority: x485.x476.rs.dns-oarc.net 59 NS ns03.x485.x476.rs.dns-oarc.net
authority: x485.x476.rs.dns-oarc.net 59 NS ns04.x485.x476.rs.dns-oarc.net
authority: x485.x476.rs.dns-oarc.net 59 NS ns05.x485.x476.rs.dns-oarc.net
authority: x485.x476.rs.dns-oarc.net 59 NS ns06.x485.x476.rs.dns-oarc.net
authority: x485.x476.rs.dns-oarc.net 59 NS ns07.x485.x476.rs.dns-oarc.net
authority: x485.x476.rs.dns-oarc.net 59 NS ns08.x485.x476.rs.dns-oarc.net
authority: x485.x476.rs.dns-oarc.net 59 NS ns09.x485.x476.rs.dns-oarc.net
authority: x485.x476.rs.dns-oarc.net 59 NS ns10.x485.x476.rs.dns-oarc.net
authority: x485.x476.rs.dns-oarc.net 59 NS ns11.x485.x476.rs.dns-oarc.net
additional: ns00.x485.x476.rs.dns-oarc.net 59 A 149.20.58.135
additional: ns01.x485.x476.rs.dns-oarc.net 59 A 149.20.58.135
additional: ns02.x485.x476.rs.dns-oarc.net 59 A 149.20.58.135
additional: ns03.x485.x476.rs.dns-oarc.net 59 A 149.20.58.135
additional: ns04.x485.x476.rs.dns-oarc.net 59 A 149.20.58.135
additional: ns05.x485.x476.rs.dns-oarc.net 59 A 149.20.58.135
additional: ns06.x485.x476.rs.dns-oarc.net 59 A 149.20.58.135
additional: ns07.x485.x476.rs.dns-oarc.net 59 A 149.20.58.135
additional: ns08.x485.x476.rs.dns-oarc.net 59 A 149.20.58.135
additional: ns09.x485.x476.rs.dns-oarc.net 59 A 149.20.58.135
additional: ns10.x485.x476.rs.dns-oarc.net 59 A 149.20.58.135
additional: ns11.x485.x476.rs.dns-oarc.net 59 A 149.20.58.135

MoinQ: DNS/用語/EDNS0/sizetest