Question

在ubuntu中收到此错误消息。在pg_hba.conf文件中，我尝试在不同的时间使用'ident'，'peer'，'trust'，'md5'。但是没有去。请帮忙。

Answer 1

在你的pg_hba.conf

中

# IPv4 local connections:
# TYPE  DATABASE    USER        CIDR-ADDRESS          METHOD
host    all         all         127.0.0.1/32         trust

如果不起作用，请尝试

host    all         all         your_ip/32         trust

然后重新启动数据库它会正常工作

Answer 2

如果用户名和密码正确，则md5是正确的值。确保重新启动数据库进程，或者至少在修改pg_hba.conf后重新加载配置。

Answer 3

这可能是来自恶意流量，请检查日志是否几乎每秒钟重复如下所示

2019-04-17 16:10:39.228 UTC [32] FATAL:  
        password authentication failed for user "postgres"
2019-04-17 16:10:39.228 UTC [32] DETAIL:  
        Connection matched pg_hba.conf line 95: "host all all all md5"
2019-04-17 16:10:41.916 UTC [33] FATAL:  
        password authentication failed for user "postgres"
2019-04-17 16:10:41.916 UTC [33] DETAIL:  
        Connection matched pg_hba.conf line 95: "host all all all md5"
...
...

让我们使用firewall rules命令验证端口5432上的TCP流量

$ sudo tcpdump port 5432 and '(tcp-syn|tcp-ack)!=0'
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on ens4, link-type EN10MB (Ethernet), capture size 262144 bytes
16:19:26.472838 IP XX-XXX-XXX-XXX-static.xxx.xxxxxx.net.39903 > xxx.xxx.xxx: Flags [S], seq 1779566115, win 29200, options [mss 1380,sackOK,TS val 451453976 ecr 0,nop,wscale 7], length 0
16:19:26.473135 IP xxx.xxx.xxx > XX-XXX-XXX-XXX-static.xxx.xxxxxx.net.39903: Flags [S.], seq 4028889669, ack 1779566116, win 28960, options [mss 1460,sackOK,TS val 2412144 ecr 451453976,nop,wscale 7], length 0
16:19:26.525816 IP XX-XXX-XXX-XXX-static.xxx.xxxxxx.net.39903 > xxx.xxx.xxx: Flags [.], ack 1, win 229, options [nop,nop,TS val 451453989 ecr 2412144], length 0
16:19:26.525875 IP xxx.xxx.xxx > XX-XXX-XXX-XXX-static.xxx.xxxxxx.net: Flags [P.], seq 1:42, ack 1, win 229, options [nop,nop,TS val 451453989 ecr 2412144], length 41
...
...

如果是这种情况，则设置https://en.cppreference.com/w/cpp/language/operator_member_access和必要的安全性以对抗机器人或有害流量。

Answer 4

我注意到我创建的用户的截止日期是昨天。它还给了我密码错误。我已经打开了pgadmin3，在底部的用户列表中我已经更改了有问题用户的截止日期。

致命：用户“postgres”的密码验证失败

4 个答案: