> Once in a while (perhaps once in six months) we do get some temporary
> stand-down when our DNS host moves things about the farm. I usually get
> advance warning of that - in hours rather than days - so usually by the time I
> get any message the deed is done.

I have been having this problem for a while now, but it seems to be increasing (see my other mail).

> Occasionally, tracker.firebirdsql.org stalls, due to a bug in the rather
> ancient version of the Atlassian Jira/Java framework it runs off. Love it
> or hate it, we just have to live with it for now. Newer versions won't run
> on the version of Linux we run.
>
> In recent days, some people have reported DNS problems from some European
> ISPs that haven't been experienced by the rest of us.

Well, I am located in Europe, the Netherlands to be exact. I have been having this problem with Ziggo (large cable provider), TUdelft/SURFnet (national university and research institute network) and the T-Systems/T-Mobile corporate network.

> I suggest that, if you're getting persistent http access problems, you try
> refreshing browser cache and/or bypassing any proxy http server that you
> have configured.

Well both are out, because it is simply a case of being unable to resolve the host name to an IP-address. So there isn't even any HTTP communication at that time. I am also not using any proxy.

> All that said, reverse DNS does NOT work (according to our DNS host
> provider, Sean's services are not configured to enable it) so nslookup won't help
> you find the breakages. A tracert could be slightly helpful.

With nslookup does (forward) lookups, not reverse lookups. In this case that lookup (hostname to IP) is failing. Tracert is unhelpful since I don't get an IP address. Note that I am using Windows Vista and it is requesting both the IPv4 and IPv6 address (if available). I have had the same problems on Windows XP (no IPv6) and Linux though.

The results of an nslookup with set debug, set d2 and set norecurse are:
C:\Users\mark>nslookup
Standaardserver: ns1.tudelft.nl
Address: 130.161.180.1

> set debug
> set d2
> set norecurse
> www.firebirdsql.org

Server: ns1.tudelft.nl
Address: 130.161.180.1

------------
SendRequest(), len 37
HEADER:
opcode = QUERY, id = 2, rcode = NOERROR
header flags: query
questions = 1, answers = 0, authority records = 0, additional = 0

QUESTIONS:
www.firebirdsql.org, type = A, class = IN

------------
------------
Got answer (196 bytes):
HEADER:
opcode = QUERY, id = 2, rcode = NOERROR
header flags: response, recursion avail.
questions = 1, answers = 0, authority records = 4, additional = 4

QUESTIONS:
www.firebirdsql.org, type = A, class = IN
AUTHORITY RECORDS:
-> firebirdsql.org
type = NS, class = IN, dlen = 23
nameserver = 2.sr3.stargateinc.net
ttl = 85476 (23 hours 44 mins 36 secs)
-> firebirdsql.org
type = NS, class = IN, dlen = 8
nameserver = 2.sr4.stargateinc.net
ttl = 85476 (23 hours 44 mins 36 secs)
-> firebirdsql.org
type = NS, class = IN, dlen = 8
nameserver = 2.sr2.stargateinc.net
ttl = 85476 (23 hours 44 mins 36 secs)
-> firebirdsql.org
type = NS, class = IN, dlen = 8
nameserver = 2.sr1.stargateinc.net
ttl = 85476 (23 hours 44 mins 36 secs)
ADDITIONAL RECORDS:
-> 2.sr1.stargateinc.net
type = A, class = IN, dlen = 4
internet address = 209.85.51.171
ttl = 32552 (9 hours 2 mins 32 secs)
-> 2.sr2.stargateinc.net
type = A, class = IN, dlen = 4
internet address = 209.85.51.171
ttl = 32552 (9 hours 2 mins 32 secs)
-> 2.sr3.stargateinc.net
type = A, class = IN, dlen = 4
internet address = 209.85.51.171
ttl = 32552 (9 hours 2 mins 32 secs)
-> 2.sr4.stargateinc.net
type = A, class = IN, dlen = 4
internet address = 209.85.51.171
ttl = 32552 (9 hours 2 mins 32 secs)

------------
------------
SendRequest(), len 37
HEADER:
opcode = QUERY, id = 3, rcode = NOERROR
header flags: query
questions = 1, answers = 0, authority records = 0, additional = 0

QUESTIONS:
www.firebirdsql.org, type = AAAA, class = IN

------------
------------
Got answer (196 bytes):
HEADER:
opcode = QUERY, id = 3, rcode = NOERROR
header flags: response, recursion avail.
questions = 1, answers = 0, authority records = 4, additional = 4

QUESTIONS:
www.firebirdsql.org, type = AAAA, class = IN
AUTHORITY RECORDS:
-> firebirdsql.org
type = NS, class = IN, dlen = 23
nameserver = 2.sr1.stargateinc.net
ttl = 85476 (23 hours 44 mins 36 secs)
-> firebirdsql.org
type = NS, class = IN, dlen = 8
nameserver = 2.sr4.stargateinc.net
ttl = 85476 (23 hours 44 mins 36 secs)
-> firebirdsql.org
type = NS, class = IN, dlen = 8
nameserver = 2.sr2.stargateinc.net
ttl = 85476 (23 hours 44 mins 36 secs)
-> firebirdsql.org
type = NS, class = IN, dlen = 8
nameserver = 2.sr3.stargateinc.net
ttl = 85476 (23 hours 44 mins 36 secs)
ADDITIONAL RECORDS:
-> 2.sr1.stargateinc.net
type = A, class = IN, dlen = 4
internet address = 209.85.51.171
ttl = 32552 (9 hours 2 mins 32 secs)
-> 2.sr2.stargateinc.net
type = A, class = IN, dlen = 4
internet address = 209.85.51.171
ttl = 32552 (9 hours 2 mins 32 secs)
-> 2.sr3.stargateinc.net
type = A, class = IN, dlen = 4
internet address = 209.85.51.171
ttl = 32552 (9 hours 2 mins 32 secs)
-> 2.sr4.stargateinc.net
type = A, class = IN, dlen = 4
internet address = 209.85.51.171
ttl = 32552 (9 hours 2 mins 32 secs)

------------
------------
SendRequest(), len 37
HEADER:
opcode = QUERY, id = 4, rcode = NOERROR
header flags: query
questions = 1, answers = 0, authority records = 0, additional = 0

QUESTIONS:
www.firebirdsql.org, type = A, class = IN

------------
------------
Got answer (196 bytes):
HEADER:
opcode = QUERY, id = 4, rcode = NOERROR
header flags: response, recursion avail.
questions = 1, answers = 0, authority records = 4, additional = 4

QUESTIONS:
www.firebirdsql.org, type = A, class = IN
AUTHORITY RECORDS:
-> firebirdsql.org
type = NS, class = IN, dlen = 23
nameserver = 2.sr2.stargateinc.net
ttl = 85476 (23 hours 44 mins 36 secs)
-> firebirdsql.org
type = NS, class = IN, dlen = 8
nameserver = 2.sr4.stargateinc.net
ttl = 85476 (23 hours 44 mins 36 secs)
-> firebirdsql.org
type = NS, class = IN, dlen = 8
nameserver = 2.sr1.stargateinc.net
ttl = 85476 (23 hours 44 mins 36 secs)
-> firebirdsql.org
type = NS, class = IN, dlen = 8
nameserver = 2.sr3.stargateinc.net
ttl = 85476 (23 hours 44 mins 36 secs)
ADDITIONAL RECORDS:
-> 2.sr1.stargateinc.net
type = A, class = IN, dlen = 4
internet address = 209.85.51.171
ttl = 32552 (9 hours 2 mins 32 secs)
-> 2.sr2.stargateinc.net
type = A, class = IN, dlen = 4
internet address = 209.85.51.171
ttl = 32552 (9 hours 2 mins 32 secs)
-> 2.sr3.stargateinc.net
type = A, class = IN, dlen = 4
internet address = 209.85.51.171
ttl = 32552 (9 hours 2 mins 32 secs)
-> 2.sr4.stargateinc.net
type = A, class = IN, dlen = 4
internet address = 209.85.51.171
ttl = 32552 (9 hours 2 mins 32 secs)

------------
------------
SendRequest(), len 37
HEADER:
opcode = QUERY, id = 5, rcode = NOERROR
header flags: query
questions = 1, answers = 0, authority records = 0, additional = 0

QUESTIONS:
www.firebirdsql.org, type = AAAA, class = IN

------------
------------
Got answer (196 bytes):
HEADER:
opcode = QUERY, id = 5, rcode = NOERROR
header flags: response, recursion avail.
questions = 1, answers = 0, authority records = 4, additional = 4

QUESTIONS:
www.firebirdsql.org, type = AAAA, class = IN
AUTHORITY RECORDS:
-> firebirdsql.org
type = NS, class = IN, dlen = 23
nameserver = 2.sr2.stargateinc.net
ttl = 85476 (23 hours 44 mins 36 secs)
-> firebirdsql.org
type = NS, class = IN, dlen = 8
nameserver = 2.sr3.stargateinc.net
ttl = 85476 (23 hours 44 mins 36 secs)
-> firebirdsql.org
type = NS, class = IN, dlen = 8
nameserver = 2.sr1.stargateinc.net
ttl = 85476 (23 hours 44 mins 36 secs)
-> firebirdsql.org
type = NS, class = IN, dlen = 8
nameserver = 2.sr4.stargateinc.net
ttl = 85476 (23 hours 44 mins 36 secs)
ADDITIONAL RECORDS:
-> 2.sr1.stargateinc.net
type = A, class = IN, dlen = 4
internet address = 209.85.51.171
ttl = 32552 (9 hours 2 mins 32 secs)
-> 2.sr2.stargateinc.net
type = A, class = IN, dlen = 4
internet address = 209.85.51.171
ttl = 32552 (9 hours 2 mins 32 secs)
-> 2.sr3.stargateinc.net
type = A, class = IN, dlen = 4
internet address = 209.85.51.171
ttl = 32552 (9 hours 2 mins 32 secs)
-> 2.sr4.stargateinc.net
type = A, class = IN, dlen = 4
internet address = 209.85.51.171
ttl = 32552 (9 hours 2 mins 32 secs)

------------
*** ns1.tudelft.nl kan www.firebirdsql.org niet vinden:
BAD ERROR VALUE

>

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