How to connect to Oracle database on AWS EC2
I have an Oracle 12C database on an EC2 instance running Oracle Linux 7.
The EC2 instance is in a public subnet and it has a public dns name and a public IP address.
The listner.ora has proper host name of the server( ip-x.x.x.x.ec2.internal).
SQLnet.ora on server has below entry -
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
I have configured the EC2 security group with inbound rule to allow port 1521 from anywhere.
I can connect to the database using SQL Developer tool and sqlplus on the server it self. But I cannot connect from other EC2 instance ( bound to the same security group) or another Windows 10 machine outside AWS.
telnet 1521 never succeeds..
My question: Do I need to open port 1521 in the firewall on the Linux server in addition to having the inbound rules in the security groups ?
linux firewall amazon-web-services
asked Jan 3 at 0:55
Ravi KumarRavi Kumar
1386
|
show 2 more comments
I have an Oracle 12C database on an EC2 instance running Oracle Linux 7.
The EC2 instance is in a public subnet and it has a public dns name and a public IP address.
The listner.ora has proper host name of the server( ip-x.x.x.x.ec2.internal).
SQLnet.ora on server has below entry -
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
I have configured the EC2 security group with inbound rule to allow port 1521 from anywhere.
I can connect to the database using SQL Developer tool and sqlplus on the server it self. But I cannot connect from other EC2 instance ( bound to the same security group) or another Windows 10 machine outside AWS.
telnet 1521 never succeeds..
My question: Do I need to open port 1521 in the firewall on the Linux server in addition to having the inbound rules in the security groups ?
linux firewall amazon-web-services
asked Jan 3 at 0:55
Ravi KumarRavi Kumar
1386
1
If there is a firewall on the Linux server then of course it needs to have the necessary ports open. Also check the output ofnetstatand see what IP the oracle DB server is bound to. If I remember right it only binds to localhost by default, but I don’t remember the details right now.
– Appleoddity
Jan 3 at 2:04
Is there a way to verify if firewall is blocking the 1521 traffic? From AWS documentation it appears Security Group inbound rules are sufficient to open the ports.
– Ravi Kumar
Jan 3 at 2:07
1
If the firewall is on the server it doesn’t have anything to do with AWS. Just like all servers and computers they have the option to install a firewall. Your server might haveiptablesor something else. You’re going to have to do some research as opening your database server up to the world is not something you should do nonchalantly and you need to understand these things.
– Appleoddity
Jan 3 at 2:11
Thanks! This is just a test machine with no real data. Will post back the netstat output.
– Ravi Kumar
Jan 3 at 2:17
1
netstat -lnthat’s the whole command
– Appleoddity
Jan 3 at 2:21
|
show 2 more comments
I have an Oracle 12C database on an EC2 instance running Oracle Linux 7.
The EC2 instance is in a public subnet and it has a public dns name and a public IP address.
The listner.ora has proper host name of the server( ip-x.x.x.x.ec2.internal).
SQLnet.ora on server has below entry -
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
I have configured the EC2 security group with inbound rule to allow port 1521 from anywhere.
I can connect to the database using SQL Developer tool and sqlplus on the server it self. But I cannot connect from other EC2 instance ( bound to the same security group) or another Windows 10 machine outside AWS.
telnet 1521 never succeeds..
My question: Do I need to open port 1521 in the firewall on the Linux server in addition to having the inbound rules in the security groups ?
linux firewall amazon-web-services
asked Jan 3 at 0:55
Ravi KumarRavi Kumar
1386
I have an Oracle 12C database on an EC2 instance running Oracle Linux 7.
The EC2 instance is in a public subnet and it has a public dns name and a public IP address.
The listner.ora has proper host name of the server( ip-x.x.x.x.ec2.internal).
SQLnet.ora on server has below entry -
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
I have configured the EC2 security group with inbound rule to allow port 1521 from anywhere.
I can connect to the database using SQL Developer tool and sqlplus on the server it self. But I cannot connect from other EC2 instance ( bound to the same security group) or another Windows 10 machine outside AWS.
telnet 1521 never succeeds..
My question: Do I need to open port 1521 in the firewall on the Linux server in addition to having the inbound rules in the security groups ?
linux firewall amazon-web-services
linux firewall amazon-web-services
asked Jan 3 at 0:55
Ravi KumarRavi Kumar
1386
asked Jan 3 at 0:55
Ravi KumarRavi Kumar
1386
edited Jan 4 at 3:55
Ravi Kumar
asked Jan 3 at 0:55
Ravi KumarRavi Kumar
1386
asked Jan 3 at 0:55
Ravi KumarRavi Kumar
1386
asked Jan 3 at 0:55
Ravi KumarRavi Kumar
1386
1386
1
If there is a firewall on the Linux server then of course it needs to have the necessary ports open. Also check the output ofnetstatand see what IP the oracle DB server is bound to. If I remember right it only binds to localhost by default, but I don’t remember the details right now.
– Appleoddity
Jan 3 at 2:04
Is there a way to verify if firewall is blocking the 1521 traffic? From AWS documentation it appears Security Group inbound rules are sufficient to open the ports.
– Ravi Kumar
Jan 3 at 2:07
1
If the firewall is on the server it doesn’t have anything to do with AWS. Just like all servers and computers they have the option to install a firewall. Your server might haveiptablesor something else. You’re going to have to do some research as opening your database server up to the world is not something you should do nonchalantly and you need to understand these things.
– Appleoddity
Jan 3 at 2:11
Thanks! This is just a test machine with no real data. Will post back the netstat output.
– Ravi Kumar
Jan 3 at 2:17
1
netstat -lnthat’s the whole command
– Appleoddity
Jan 3 at 2:21
|
show 2 more comments
1
If there is a firewall on the Linux server then of course it needs to have the necessary ports open. Also check the output ofnetstatand see what IP the oracle DB server is bound to. If I remember right it only binds to localhost by default, but I don’t remember the details right now.
– Appleoddity
Jan 3 at 2:04
Is there a way to verify if firewall is blocking the 1521 traffic? From AWS documentation it appears Security Group inbound rules are sufficient to open the ports.
– Ravi Kumar
Jan 3 at 2:07
1
If the firewall is on the server it doesn’t have anything to do with AWS. Just like all servers and computers they have the option to install a firewall. Your server might haveiptablesor something else. You’re going to have to do some research as opening your database server up to the world is not something you should do nonchalantly and you need to understand these things.
– Appleoddity
Jan 3 at 2:11
Thanks! This is just a test machine with no real data. Will post back the netstat output.
– Ravi Kumar
Jan 3 at 2:17
1
netstat -lnthat’s the whole command
– Appleoddity
Jan 3 at 2:21
1
1
If there is a firewall on the Linux server then of course it needs to have the necessary ports open. Also check the output of
netstat and see what IP the oracle DB server is bound to. If I remember right it only binds to localhost by default, but I don’t remember the details right now.– Appleoddity
Jan 3 at 2:04
If there is a firewall on the Linux server then of course it needs to have the necessary ports open. Also check the output of
netstat and see what IP the oracle DB server is bound to. If I remember right it only binds to localhost by default, but I don’t remember the details right now.– Appleoddity
Jan 3 at 2:04
Is there a way to verify if firewall is blocking the 1521 traffic? From AWS documentation it appears Security Group inbound rules are sufficient to open the ports.
– Ravi Kumar
Jan 3 at 2:07
Is there a way to verify if firewall is blocking the 1521 traffic? From AWS documentation it appears Security Group inbound rules are sufficient to open the ports.
– Ravi Kumar
Jan 3 at 2:07
1
1
If the firewall is on the server it doesn’t have anything to do with AWS. Just like all servers and computers they have the option to install a firewall. Your server might have
iptables or something else. You’re going to have to do some research as opening your database server up to the world is not something you should do nonchalantly and you need to understand these things.– Appleoddity
Jan 3 at 2:11
If the firewall is on the server it doesn’t have anything to do with AWS. Just like all servers and computers they have the option to install a firewall. Your server might have
iptables or something else. You’re going to have to do some research as opening your database server up to the world is not something you should do nonchalantly and you need to understand these things.– Appleoddity
Jan 3 at 2:11
Thanks! This is just a test machine with no real data. Will post back the netstat output.
– Ravi Kumar
Jan 3 at 2:17
Thanks! This is just a test machine with no real data. Will post back the netstat output.
– Ravi Kumar
Jan 3 at 2:17
1
1
netstat -ln that’s the whole command– Appleoddity
Jan 3 at 2:21
netstat -ln that’s the whole command– Appleoddity
Jan 3 at 2:21
|
show 2 more comments
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1
If there is a firewall on the Linux server then of course it needs to have the necessary ports open. Also check the output of
netstatand see what IP the oracle DB server is bound to. If I remember right it only binds to localhost by default, but I don’t remember the details right now.– Appleoddity
Jan 3 at 2:04
Is there a way to verify if firewall is blocking the 1521 traffic? From AWS documentation it appears Security Group inbound rules are sufficient to open the ports.
– Ravi Kumar
Jan 3 at 2:07
1
If the firewall is on the server it doesn’t have anything to do with AWS. Just like all servers and computers they have the option to install a firewall. Your server might have
iptablesor something else. You’re going to have to do some research as opening your database server up to the world is not something you should do nonchalantly and you need to understand these things.– Appleoddity
Jan 3 at 2:11
Thanks! This is just a test machine with no real data. Will post back the netstat output.
– Ravi Kumar
Jan 3 at 2:17
1
netstat -lnthat’s the whole command– Appleoddity
Jan 3 at 2:21