【发布时间】：2014-05-24 08:51:26
【问题描述】：
CENTOS 6.5 x86_64 WHM 11.42.1 unixODBC 2.2.14
freetds v0.91
我正在尝试连接到远程 MSSQL 服务器但没有成功 - 还尝试连接不同的 tds 版本（4.2、7.0、7.1、8.0），但都给出了相同的结果。
使用相同的服务器名称、端口、用户名和密码，我可以使用 Win7 和 SQL Server Management Studio 通过我的桌面进行连接。
Telnet 也失败了。
详情如下。如果您需要更多，请告诉我。感谢所有帮助/建议。
========
tsql -C
Compile-time settings (established with the "configure" script)
Version: freetds v0.91
freetds.conf directory: /etc
MS db-lib source compatibility: yes
Sybase binary compatibility: yes
Thread safety: yes
iconv library: yes
TDS version: 4.2
iODBC: no
unixodbc: yes
SSPI "trusted" logins: no
Kerberos: yes
========
tsql -H testDSN -pXXXX -U 'testuser' -P 'testpass'
locale is "en_US.UTF-8"
locale charset is "UTF-8"
using default charset "UTF8"
20Error 20009 (severity 9):
Unable to connect: Adaptive Server is unavailable or does not exist
OS error 110, "Connection timed out"
There was a problem connecting to the server
=======
isql -v testDSN 'testuser' 'testpass'
[S1000][unixODBC][FreeTDS][SQL Server]Unable to connect to data source
[08S01][unixODBC][FreeTDS][SQL Server]Unable to connect: Adaptive Server is unavailable or does not exist
[ISQL]ERROR: Could not SQLConnect
======== osql -S testDSN -U 'testuser' -P 'testpass' ...
Configuration looks OK. Connection details:
DSN: testDSN
odbc.ini: /etc/odbc.ini
Driver: /usr/lib64/libtdsodbc.so
Server hostname: winsrv106.pleskdns.co.uk
Address: x.x.x.x
Attempting connection as testuser ...
+ isql testDSN testuser 'testpass' -v
[S1000][unixODBC][FreeTDS][SQL Server]Unable to connect to data source
[08S01][unixODBC][FreeTDS][SQL Server]Unable to connect: Adaptive Server is unavailable or does not exist
[ISQL]ERROR: Could not SQLConnect
net.c:205:FAILED Connecting to x.x.x.x port XXXX (TDS version 7.1)
========
更多 freetds.log
log.c:196:Starting log file for FreeTDS 0.91
on 2014-04-10 15:33:03 with debug flags 0x4fff.
iconv.c:330:tds_iconv_open(0x7233e0, UTF8)
iconv.c:187:local name for ISO-8859-1 is ISO-8859-1
iconv.c:187:local name for UTF-8 is UTF-8
iconv.c:187:local name for UCS-2LE is UCS-2LE
iconv.c:187:local name for UCS-2BE is UCS-2BE
iconv.c:349:setting up conversions for client charset "UTF8"
iconv.c:351:preparing iconv for "UTF8" <-> "UCS-2LE" conversion
iconv.c:391:preparing iconv for "ISO-8859-1" <-> "UCS-2LE" conversion
iconv.c:394:tds_iconv_open: done
net.c:205:Connecting to x.x.x.x port XXXX (TDS version 7.1)
net.c:270:tds_open_socket: connect(2) returned "Operation now in progress"
net.c:306:getsockopt(2) reported: Connection timed out
net.c:316:tds_open_socket() failed
util.c:331:tdserror(0x723140, 0x7233e0, 20009, 110)
util.c:361:tdserror: client library returned TDS_INT_CANCEL(2)
util.c:384:tdserror: returning TDS_INT_CANCEL(2)
mem.c:615:tds_free_all_results()
========
telnet x.x.x.x
Trying x.x.x.x...
telnet: connect to address x.x.x.x:
Connection timed out
【问题讨论】：
-
有人知道“Adaptive Server 不可用或不存在”是什么意思吗？
-
当我通过 SQL Server Management Studio 连接时，远程服务器凭据必须没问题...并且 osql 在本地服务器上声明“配置看起来没问题”。唯一的线索是在 freetds.log 中指出“tds_open_socket() failed”。有谁知道是什么原因造成的？
-
刚刚发现："Unable to open socket" 是 src/tds/net.c::tds_open_socket() 产生的 TDSECONN。这是 inet_addr(3) 或（更有可能）socket(3) 失败的结果。虽然您确实无法连接，但更准确地说，您被本地阻止尝试连接。要连接你需要一个本地资源——一个套接字——而你无法创建一个。我希望日志显示“套接字创建错误”和操作系统的错误消息。如果 EACCES 是问题所在，我不会感到惊讶。 （在这种情况下 telnet(1) 也会失败。）lists.ibiblio.org/pipermail/freetds/2009q3/025094.html
-
在本地服务器上的所需端口打开入站和出站后解决
-
嗨，我们遇到了同样的错误。你能告诉我你是如何具体解决这个问题的吗？我花了将近 2 天的时间来解决这个错误。谢谢