I'm having issues connecting to my AWS EC2 Server holding a MySQL Server.
Here's my Response from mysqli_connect
p#xxx.com [~/app]# php checkmysqlremote.php
Error: Unable to connect to MySQL.
Debugging errno: 2002
Debugging error: Connection refused
Here's my netstat -tuplen on the EC2 Server containing the MySQL Server
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 999 20299 1378/mysqld
As you can see its binding to the 0.0.0.0 address correctly.
I enabled the 3306 port in inbound rules for EC2.
on the server making the request handshake, I ran:
curl -s example.com:3306 >/dev/null && echo Success. || echo Fail.
which resulted in Fail.
I also ran it on the local server instance and it responded with Success.
I also ran nmap on the server making the handshake,
nmap -p 3306 example.com
Nmap scan report for example.com (1.1.1.1)
Host is up (0.048s latency).
PORT STATE SERVICE
3306/tcp filtered mysql
Nmap done: 1 IP address (1 host up) scanned in 2.03 seconds
Lastly, I tried adding the following rules in iptables:
iptables -A INPUT -i eth0 -s "example.com" -p tcp --destination-port 3306 -j ACCEPT
and
sudo iptables -I INPUT -i eth0 -p tcp -m tcp --dport 3306 -j ACCEPT
I don't know what to do at this point.
UPDATE
I tried pinging the EC2 server from the remote server and it did not return anything. At this point i think the issue is with EC2.
Try adding the follwing GRANT to your user:
GRANT ALL PRIVILEGES ON *.* TO 'user'#'ipadress'
Sounds like the port might not be getting forwarded correctly? One thing to try might be to put an Amazon Elastic Load Balancer in front of the instance. Then you can forward port 3306 for the MySQL connection.
I have downloaded PhpStorm and set all the required configuration. When I try to run the project on port 80, I get this error.
Failed to listen on localhost:80 (reason: Permission denied)
And when I try to use any other ports like 8080 ,I get this error.
Failed to listen on localhost:8080 (reason: Address already in use)
I have tried several different random ports. But I get this already in use error all the time.
I have xampp installed. And when I try to run the url in browser with port , it works fine. The problem is that it isn't working on PhpStorm.
I am stuck.
The errors description are very clear:
The error:
Failed to listen on localhost:80 (reason: Permission denied)
You really don't have permission to use this port; so you need to change your user or use sudo to run your application.
and the error:
Failed to listen on localhost:8080 (reason: Address already in use)
The address that you are trying to use localhost:8080 is already in use by other processes/software.
Normally, if you change the port will solve the problem: (eg. 9090).
But, if you want to know which program is using the port 80 in Unix (Mac OSX, Linux), you can use the lsof command:
To do this:
In the terminal, you need to use:
sudo lsof -i :80
That will result something like this:
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
httpd 82 root 4u IPv6 0x763617bed21ecc33 0t0 TCP *:http (LISTEN)
httpd 226 _www 4u IPv6 0x763617bed21ecc33 0t0 TCP *:http (LISTEN)
On this result, we can see that the /usr/sbin/httpd is listening on port 80 on my machine, which is the Apache server.
To know the details of the process that is listening on port 80 you can use the ps command:
ps u PID_of_target_process
that will return a result similar to this:
USER PID %CPU %MEM VSZ RSS TT STAT STARTED TIME COMMAND
root 82 0.0 0.0 2463324 4248 ?? Ss 9:48AM 0:00.93 /usr/sbin/httpd -D FOREGROUND
To kill the process by the PID you can use the kill command, like the following:
sudo kill -KILL PID_of_target_process
After you kill the process the port will be available again.
The PHPStorm / Intellij built-in web server listens on port 63342 by default.
https://confluence.jetbrains.com/display/PhpStorm/Using+the+Built-in+Webserver+in+PhpStorm
You can set the port in the Run/Debug Configurations under PHP Built-in Web Server:
Stop your Apache server from XAMPP.
Run your PHPStorm with ROOT privileges.
If running PHPStorm is showing your the same error saying Failed to listen on localhost:8080 (reason: Address already in use). The ports 80 is used by any other application. Try checking your used ports with a free tools out there. Stop the process using port 80 and try running the phpstorm.
Xampp for Mac
if you find you cannot get apache to run and you have
no apache web server already running!
......in terminal type.....
sudo apachectl stop
......then run......
sudo /Applications/XAMPP/xamppfiles/bin/apachectl start
.....if you have a port not specified you need to go into
applications/xampp/xamppfiles/etc/httpd.conf and on line 52 or 53
you have a ip or localhost you can set.
adding a port number
add :port number example 192.168.64.2:80 or localhost:80
save and run sudo /Applications/XAMPP/xamppfiles/bin/apachectl start }}}}}}}}}}}}}
Today I've been trying to access MySQL running on my remote work machine (Ubuntu), from my home machine (OSX), and I've had no success.
On my work machine, I've checked the following:
sudo netstat -ntlup | grep mysql
gives
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 23692/mysqld
and nmap tells me
PORT STATE SERVICE
3306/tcp open mysql
and in /etc/mysql/my.cnf I've set bind-address = 0.0.0.0
I've also run the following iptables rules:
iptables -A INPUT -i lo -p tcp --dport 3306 -j ACCEPT
iptables -A OUTPUT -o lo -p tcp --sport 3306 -j ACCEPT
What else can I check?
If there is some corporate network rule blocking my MySQL access, what could I check to find this?
The only way I can make this work is ssh tunnelling:
ssh -L 8080:localhost:3306 my_user_name#my_dev_machine_IP
and then if I do
mysql -h 127.0.0.1 --port=8080 -u root -p
I can get in. If I close the ssh tunnel, then I can't log in via mysql, nor even via telnet remote_IP 3306.
But this is no good for what I want, because I need the PHP code running on my local machine to be able to access the remote database.
I've also (hopefully temporarily) opened up the access to the MySQL databases to all hosts/IP:
GRANT ALL PRIVILEGES ON *.* TO 'application_username'#'%'
FLUSH PRIVILEGES
Any advice gratefully received!
Ubuntu has uwf - in some vps installations it is enabled by default. So, if it is, do sudo ufw allow 3306. I am writing this jsut in case you run nmap from your work machine. If nmap shows that result run from your mac, then this does not apply.
I've got a root server (Ubuntu 14.04) with a MYSQL (5.5.41) running and trying to access the database from two diffrent homepages on two diffrent server. The homepage servers use static ips.
I set up iptables on the root.
iptables -A INPUT -p tcp --dport 3306 -s 127.0.0.1 -j ACCEPT
iptables -A INPUT -p tcp --dport 3306 -s 'my_homepage_ip' -j ACCEPT
iptables -A INPUT -p tcp --dport 3306 -j REJECT --reject-with icmp-port-unreachable
If I try to access the server from the two homepages I get:
Can't connect to MySQL server on 'server_ip' (111)2003.
The homepages are running on webspaces from some german provider called 1und1.
If I open the iptables and delete the reject line, everything works fine. Also I tried to access the SQL Server from my local computer which is running an XAMPP server with the same script as I use at the homepage server. This works fine.
Server('my_server') and Port (3306) are defined in my php script.
$db = new mysqli(DB_SERVER, DB_USER, DB_PASS, DB_NAME, DB_PORT);
I assume that I got wrong IPs of the homepage server or that the homepage server use an other port than 3306.
Try changing your 3rd line to iptables -A INPUT -p tcp --dport 3306 -j LOG. This will log all attempts to the MySQL port to your /var/log/messages file, including the source IP address. This will allow you to verify that the source IP is the same as the IP being used for your website proper. If it is different, just change line 2 with the correct IP address.
I installed fresh RabbitMQ 3.1.3 on ubuntu 12.04.2 LTS by apt-get, and try to start consumers on the same server, but I have connection problem:
[PhpAmqpLib\Exception\AMQPRuntimeException]
Error Connecting to server(113): No route to host
There is status of working server:
Status of node rabbit#ns1 ...
[{pid,2106},
{running_applications,[{rabbit,"RabbitMQ","3.1.3"},
{mnesia,"MNESIA CXC 138 12","4.5"},
{os_mon,"CPO CXC 138 46","2.2.7"},
{xmerl,"XML parser","1.2.10"},
{sasl,"SASL CXC 138 11","2.1.10"},
{stdlib,"ERTS CXC 138 10","1.17.5"},
{kernel,"ERTS CXC 138 10","2.14.5"}]},
{os,{unix,linux}},
{erlang_version,"Erlang R14B04 (erts-5.8.5) [source] [64-bit] [smp:4:4] [rq:4] [async-threads:30] [kernel-poll:true]\n"},
{memory,[{total,27728944},
{connection_procs,2704},
{queue_procs,5408},
{plugins,0},
{other_proc,9021680},
{mnesia,60016},
{mgmt_db,0},
{msg_index,31144},
{other_ets,770736},
{binary,1968},
{code,14560395},
{atom,1356081},
{other_system,1918812}]},
{vm_memory_high_watermark,0.4},
{vm_memory_limit,1262847590},
{disk_free_limit,1000000000},
{disk_free,214706556928},
{file_descriptors,[{total_limit,924},
{total_used,3},
{sockets_limit,829},
{sockets_used,1}]},
{processes,[{limit,1048576},{used,125}]},
{run_queue,0},
{uptime,1265}]
...done.
I don't have any limitations by iptables (ports):
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
And etc/hosts is OK.
127.0.0.1 localhost
{IP-ADDRESS} ns1.***.org ns1
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
Whay I'm doing wrong?
UPD:
sudo netstat -nlp | grep 5672 returns: tcp6 0 0 :::5672 :::* LISTEN 2106/beam.smp
From rabbitMQ logs:
=INFO REPORT==== 2-Jul-2013::16:05:11 ===
started TCP Listener on [::]:5672
=INFO REPORT==== 2-Jul-2013::16:05:11 ===
Server startup complete; 0 plugins started.
=INFO REPORT==== 2-Jul-2013::16:35:04 ===
accepting AMQP connection <0.1130.0> (127.0.0.1:44112 -> 127.0.0.1:5672)
=ERROR REPORT==== 2-Jul-2013::16:35:14 ===
closing AMQP connection <0.1130.0> (127.0.0.1:44112 -> 127.0.0.1:5672):
{handshake_timeout,handshake}
I tried to change localhost to ip6-localhost and sometimes when try to starting consumer, it returns:
[PhpAmqpLib\Exception\AMQPRuntimeException]
Error Connecting to server(110): Connection timed out
UPD2 If I start consumer with debug flag and --env=prod (php .../app/console rabbitmq:consumer -w -d consumer_name), consumer starts and working.
If the necessary ports are not open on the rabbitmq server, you get this "No route to host" error when the client tries to connect.
To fix it, make sure the ports are open, if not, open them:
sudo iptables -I INPUT -p tcp --dport 5672 --syn -j ACCEPT
sudo iptables -I INPUT -p tcp --dport 5673 --syn -j ACCEPT
sudo iptables -I INPUT -p tcp --dport 15672 --syn -j ACCEPT
This sets it on temporally. Set it permanently with your iptables.
sudo vi /etc/sysconfig/iptables
Then restart:
sudo service iptables restart
Problem was fixed with reconfiguring listen address from 0.0.0.0:5672 to 127.0.0.1:5672 and small security fixes in OS.