feature: add general env var for allowing internal ip connections and update relevant docs

backend/src/ee/services/dynamic-secret/dynamic-secret-fns.ts

@@ -42,7 +42,7 @@ export const verifyHostInputValidity = async (host: string, isGateway = false) =
     inputHostIps.push(...resolvedIps);
   }
 
-  if (!isGateway && !appCfg.DYNAMIC_SECRET_ALLOW_INTERNAL_IP) {
+  if (!isGateway && !(appCfg.DYNAMIC_SECRET_ALLOW_INTERNAL_IP || appCfg.ALLOW_INTERNAL_IP_CONNECTIONS)) {
     const isInternalIp = inputHostIps.some((el) => isPrivateIp(el));
     if (isInternalIp) throw new BadRequestError({ message: "Invalid db host" });
   }

backend/src/lib/config/env.ts

@@ -197,6 +197,7 @@ const envSchema = z
     /* ----------------------------------------------------------------------------- */
 
     /* App Connections ----------------------------------------------------------------------------- */
+    ALLOW_INTERNAL_IP_CONNECTIONS: zodStrBool.default("false"),
 
     // aws
     INF_APP_CONNECTION_AWS_ACCESS_KEY_ID: zpStr(z.string().optional()),

backend/src/lib/validator/validate-url.ts

@@ -2,10 +2,16 @@ import dns from "node:dns/promises";
 
 import { isIPv4 } from "net";
 
+import { getConfig } from "@app/lib/config/env";
+
 import { BadRequestError } from "../errors";
 import { isPrivateIp } from "../ip/ipRange";
 
 export const blockLocalAndPrivateIpAddresses = async (url: string) => {
+  const appCfg = getConfig();
+
+  if (appCfg.isDevelopmentMode) return;
+
   const validUrl = new URL(url);
   const inputHostIps: string[] = [];
   if (isIPv4(validUrl.host)) {
@@ -18,7 +24,8 @@ export const blockLocalAndPrivateIpAddresses = async (url: string) => {
     inputHostIps.push(...resolvedIps);
   }
   const isInternalIp = inputHostIps.some((el) => isPrivateIp(el));
-  if (isInternalIp) throw new BadRequestError({ message: "Local IPs not allowed as URL" });
+  if (isInternalIp && !appCfg.ALLOW_INTERNAL_IP_CONNECTIONS)
+    throw new BadRequestError({ message: "Local IPs not allowed as URL" });
 };
 
 type FQDNOptions = {

docs/integrations/app-connections/mssql.mdx

@@ -51,6 +51,10 @@ Infisical supports connecting to Microsoft SQL Server using database principals.
         - `username` - The username of the login created in the steps above
         - `password` - The password of the login created in the steps above
         - `sslCertificate` (optional) - The SSL certificate required for connection (if configured)
+
+        <Note>
+            If you are self-hosting Infisical and intend to connect to an internal/private IP address, be sure to set the `ALLOW_INTERNAL_IP_CONNECTIONS` environment variable to `true`.
+        </Note>
     </Step>
 </Steps>
 

docs/integrations/app-connections/postgres.mdx

@@ -41,6 +41,10 @@ Infisical supports connecting to PostgreSQL using a database role.
         - `username` - The role name of the login created in the steps above
         - `password` - The role password of the login created in the steps above
         - `sslCertificate` (optional) - The SSL certificate required for connection (if configured)
+
+        <Note>
+            If you are self-hosting Infisical and intend to connect to an internal/private IP address, be sure to set the `ALLOW_INTERNAL_IP_CONNECTIONS` environment variable to `true`.
+        </Note>
     </Step>
 </Steps>
 

docs/self-hosting/configuration/envars.mdx

@@ -34,6 +34,10 @@ Used to configure platform-specific security and operational settings
   this to `false`.
 </ParamField>
 
+<ParamField query="ALLOW_INTERNAL_IP_CONNECTIONS" type="bool" default="false" optional>
+    Determines whether App Connections and Dynamic Secrets are permitted to connect with internal/private IP addresses.
+</ParamField>
+
 ## CORS
 
 Cross-Origin Resource Sharing (CORS) is a security feature that allows web applications running on one domain to access resources from another domain.