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What is the port for a hostname query?


What is the port for a hostname query?

By : Sagda Caliph
Date : November 21 2020, 07:01 PM
seems to work fine Most of the "well known ports" found in /etc/services are remnants of historic implementations -- implementations of these "historic protocols" are no longer in use.
The port 101 you found is commented "NIC Host Name Server". I found that RFC 811 and RFC953 describe the protocol served on port 101. Most interesting to note is that the only implementation at the time of RFC 811 (1982) was running on a particular machine at SRI International. The "port 101 protocol" is not a service that you will find on the Internet in the modern time.
code :


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What is the best way to store hostname and port?

What is the best way to store hostname and port?


By : user3653020
Date : March 29 2020, 07:55 AM
wish help you to fix your issue I need a map in which I store ID (key) and hostname:port (value). What type of object should I use to store the value? , You could use an InetSocketAddress.
Can I map a hostname *and* a port with /etc/hosts?

Can I map a hostname *and* a port with /etc/hosts?


By : Vikash Mishra
Date : March 29 2020, 07:55 AM
seems to work fine No, that's not possible. The port is not part of the hostname, so it has no meaning in the hosts-file.
how to get hostname and port from odbc

how to get hostname and port from odbc


By : user3423064
Date : March 29 2020, 07:55 AM
Hope this helps DB2 database connections are configured by the DB2 client software on your machine. When the connections have been defined within the client software they are then exposed to the ODBC Data Sources panel. You can't configure them via the control panel.
To view them, open a DB2 Command Window, and issue the command db2 list db directory. This will list all databases your system knows about:
code :
C:\Program Files\IBM\SQLLIB\BIN>db2 list db directory

 System Database Directory

 Number of entries in the directory = 2

Database 1 entry:

 Database alias                       = SAMPLE
 Database name                        = SAMPLE
 Node name                            = DB2AED1
 Database release level               = 10.00
 Comment                              =
 Directory entry type                 = Remote
 Catalog database partition number    = -1
 Alternate server hostname            =
 Alternate server port number         =

Database 2 entry:

 Database alias                       = IBMDSMR
 Database name                        = IBMDSMR
 Local database directory             = C:
 Database release level               = 10.00
 Comment                              =
 Directory entry type                 = Indirect
 Catalog database partition number    = 0
 Alternate server hostname            =
 Alternate server port number         =
C:\Program Files\IBM\SQLLIB\BIN>db2 list node directory

 Node Directory

 Number of entries in the directory = 1

Node 1 entry:

 Node name                      = DB2AED1
 Comment                        =
 Directory entry type           = LOCAL
 Protocol                       = TCPIP
 Hostname                       = mydb2.stackoverflow.com
 Service name                   = 50000
PostgreSQL 9.3: Query to get hostname,port number and username

PostgreSQL 9.3: Query to get hostname,port number and username


By : Maimaipa
Date : March 29 2020, 07:55 AM
I hope this helps . I want to write a query which should result me the following details:
code :
SELECT CURRENT_USER usr
      ,inet_server_addr() host -- use inet_client_addr() to get address of the remote connection
      ,inet_server_port() port -- use inet_client_port() to get port of the remote connection
Hostname was NOT found in DNS cache for port 8080 but fine on port 80?

Hostname was NOT found in DNS cache for port 8080 but fine on port 80?


By : Amjad Aslam
Date : March 29 2020, 07:55 AM
With these it helps No, Hostname was NOT found in DNS cache is not the problem. You can clearly see on the next line, in both examples, that after saying that curl is trying to connect to 192.168.1.217. Your problem is that nothing is answering on port 8080 on that IP address (while an Apache server is answering on port 80 there).
If you're getting a long pause and then a timeout rather than a quick "Connection refused", you almost certainly need to open port 8080 in the local firewall on your server machine.
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