Here’s another guide to using the Proxy protocol with a Percona server. The description of the protocol by Willy, HAProxy developer: proxy protocol. The PROXY protocol … Now here’s the good part: how to install, configure and use the Proxy protocol with a MySQL database. Proxy protocol makes a Percona server more secure and easier to manage as shown by the now-correct text in the highlighted line (2) int the following Percona slow log entry: The previous output is produced by the same query (and from the same node) that was shown in The Database Security Problem section, but we can now see that the client’s actual IP address is Chad Lavoie Chad Lavoie | Mar 24, 2017 | SECURITY | 2 comments. Well, when you lose client information like IP address when relaying connections through proxies, this tends to prevent you from being able to implement some pretty basic IP-level security and logging. The following MySQL statement will add said grant: The HAProxy server will use these grants instead of the existing grants once the Proxy protocol has been enabled on the HAProxy and Percona servers. It … This allows an upstream proxy to pass IP address and port of the client which Haraka will use instead of the socket IP address (which is of the proxy… Want more information? Terminate the SSL using HTTP/2 in NginX. You may also want to configure the firewall on the Percona server to only accept connections from a HAProxy server, which ensures that clients must use a HAProxy server to access the Percona server. These endpoints could include proxies, reverse-proxies, load-balancers, application servers and WAFs. Thi… The proxy protocol prevents the need for infrastructure changes or NATing firewalls, and offers the benefits of being protocol … As said previously, HAProxy doesn’t analyze the SSH protocol and, anyway, this protocol doesn’t provide any hint about the destination. < advertisement > An other solution … This patch for haproxy … The second security issue you may face from seeing the incorrect IP address is that MySQL grants can no longer allow just one client to use a given username if it is allowed to access MySQL through the HAProxy server via its firewall/acl’s, as to MySQL all IP’s look the same.  With the Proxy protocol you can maintain better privilege segregation between databases even if an attacker manages to get the password for a MySQL user dedicated for another client. The description of the protocol by Willy, HAProxy developer: proxy protocol. If you are proxying an HTTP(S) server, chances are that you have used the X-Forwarded-From header to keep the real remote address of the client making the request and not receving the proxy… You can learn a whole lot from our experts. The Proxy protocol requires you to add grants for servers that will be behind an HAProxy server as if the proxy wasn’t there. A proxy will use its own IP stack to get connected on remote servers. The status of the Percona server will be marked as “down” in HAProxy after you enable the proxy_protocol_networks statement on the Percona server, provided you didn’t manually disable it during transmission (and are following this guide in order and haven’t added send-proxy yet). HAProxy server running without the Proxy protocol can create a couple security problems when you grant users access to the MySQL servers behind it. Based on the docs of the accept-proxy bind option, and more generically the usage of the PROXY protocol, all the fields contained in the PROXY protocol header (source IP & port, destination IP & port) replace those from the real connection:. That’s where the proxy-protocol comes in: The is only one condition: both endpoints of the connection MUST be compatible with proxy protocol. It’s a protocol that HAProxy uses to connect to its backend by adding a preamble that contains information about the origin connection. Consider the following entry from a slow query log: The above example shows that a host on or behind the HAProxy server at has issued a query that is suspicious or has performance issues, but we can’t identify the host. An HAProxy server running without the Proxy protocol can create a couple security problems when you grant users access to the MySQL servers behind it. To be fair, while the initial thoughts leading to the Proxy protocol started in 2008 while trying to implement XCLIENT in haproxy 1.3 and/or to find a simpler alternative, the proxy protocol v1 design was the result of some work done with Emeric to ease integration with stunnel before we had support for native SSL. How Proxy Protocol Works. The HAProxy router can be configured to accept the PROXY protocol and decapsulate the HTTP request. Add a section to the HAProxy configuration file like the following: Add a grant to the Percona server so it will allow health checks with a MySQL command as follows: Restart HAProxy after adding the grant statements to the Percona server. In the mysqld section of /etc/mysql/percona-server.conf.d/mysqld.cnf add the following line: The above statement will accept a single IP address, multiple IP addresses separated by commas or a masked IP address like For example, assume that you want the host at IP address to connect to the database. It is important in case of MariaDB, since IP information is actually a part of user identity. This blog presents my latest experience about how to configure and enable proxy protocol with stack of AWS NLB and Istio Ingress gateway. The Proxy Protocol was designed to chain proxies / reverse-proxies without losing the client information. Why use the Proxy protocol? With this added HAProxy will also send the Proxy protocol for health checks, but the result won’t be used by Percona as it won’t accept; as such your existing grants for health checks will continue to be used. However, the second curl with --haproxy-protocol … So you go from letting anyone in who seems to have a legitimate credentials (with possible malicious intent): To keeping out any users not coming from authorized IP addresses: Congratulations on your new level of data security! Proxy everything transparently (aka. Append the following argument send-proxy to the server line (of the Percona server) in the backend section of the HAProxy configuration: The above statement tells HAProxy to send the Proxy protocol packet for both health checks and normal connections. We’ll use the TLS protocol … Here’s how to do it: First, we need to tell Haproxy to use the proxy protocol. The load balancer prepends a proxy protocol header to the TCP data. Connections accepted on such listeners: will behave just as if the source really was the one advertised in the: protocol. You can also run grants on the MySQL server with the client’s real IP address instead of just the HAProxy server’s IP address. HAProxy PROXY protocol support for downstream connections #1688. The first curl should fail with Empty reply from server because NGINX expects the PROXY protocol. A proxy uses its IP stack to connect to remote servers, but this process normally loses the initial TCP connection data, including the source IP address, destination IP address and port number. So you may not really know who you’re letting in to access your data: In this post, I’ll show you how to use the Proxy protocol with HAProxy to enhance the security of your database. So, we have to wrap the connections inside another protocol that will help on that point. In NginX be sure to: Use send-proxy-protocol in NginX. You could review the HAProxy logs for activity that occurred around the indicated time to identify the host, but this approach is usually impractical due to the delay between the timestamps of the HAProxy and MySQL logs. Nice article, with funny cartoons 🙂. This could be either proxies, reverse-proxies, load-balancers, WAF, application servers, etc…. HAProxy must be configured to send PROXY packets to your BungeeCord backend(s) in the backend or server configuration using the send-proxy or send-proxy … And a few articles speaking about the subject: The list below summarizes which software have already implemented the proxy protocol: A powerful product tailored to your enterprise goals, requirements, and infrastructure. # Wrapping up. The IP addresses in the process list table are also more useful with the Proxy protocol as can be seen here: I was thinking about new listen port on Nginx accepting proxy protocol from HAProxy and kind of internal redirection to the local 443 port without SSL decoding / encoding, but with passing the original client IP taken from HAProxy. It does not discard or overwrite any existing data, including any proxy protocol … The proxy protocol allows proxy programs to relay the IP of the clients to the server programs. I also though UDP support would be nice but then I realized I could … Health checks will mark the node as down until send-proxy is added (and regular connections through it will encounter the same error). IP addresses with the proxy protocol in the process list table. The Proxy protocol’s only technical requirement is that both of the connection’s endpoints must be compatible with the Proxy protocol. Make sure that Nginx … proxy protocol介绍及nginx配置. Today I became aware of the proxy protocol. It’s also more robust against misconfigured servers as it was designed to produce a quick error on most protocols if the server is not configured so support it. It turns out Haproxy can’t add requests to an https request that terminates on a different server. By the way I suggest that everyone uses send-proxy-v2 instead of v1 wherever possible, it’s the only one which can pass extra information (SSL cert, SNI, ALPN, …) and is much faster to produce and to parse since it’s binary. It allows the proxy to learn cookies sent by the server to the client, and to find it back in the URL to direct the client to the right server. With the PROXY protocol… 1 . Furthermore, Tproxy can’t pass IP packets through firewalls that use NAT. As per the proxy protocol specification, the connecting client can prefix its first packet with a proxy protocol … When you select the target HAproxy VIP from the drop down list - it will automatically modify HAProxy to accept PROXY protocol … Check out the full protocol spec on the HAProxy … The dig should show the external load balancer IP address. proxy protocol的接收端必须在接收到完整有效的 proxy protocol 头部后才能开始处理连接数据。因此对于服务器的同一个监听端口,不存在兼容带proxy protocol包的连接和不带proxy protocol … © 2021 HAProxy Technologies, LLC. An asterisk (“*”) for the IP address will cause the server to accept the Proxy protocol from any host, although this isn’t recommended for security reasons. First, Slow query logs and “show full processlist” commands on a MySQL server behind a HAProxy server that isn’t running the Proxy protocol won’t show the correct IP addresses of the clients, making it more difficult to identify hosts which are sending unoptimized, incorrect or queries injected via SQLi. Add an entry for each HAProxy server that will handle traffic to a Percona server. However, there is a solution: HAProxy invented the so-called PROXY protocol. Note that you’ll have to use HAProxy 1.5 branch or patched HAProxy 1.4. proxy protocol是HAProxy的作者Willy Tarreau于2010年开发和设计的一个Internet协议,通过为tcp添加一个很小的头信息,来方便的传递客户端信息(协议栈 … This problem occurs because Percona now requires the Proxy protocol but HAProxy isn’t yet sending it. Note that Percona won’t accept the Proxy protocol from even if it is in proxy_protocol_networks; so if you are running HAProxy on the same server that you are running Percona on this issue may rear its ugly head.