From 494a2145d1a0645e54791a39d34f53fcddb1b7eb Mon Sep 17 00:00:00 2001
From: jpk68 <jpk68@tutanota.com>
Date: Sat, 24 Jan 2026 20:24:09 -0500
Subject: [PATCH] Enable IPv6 support for ZMQ server

---
 src/rpc/zmq_server.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/rpc/zmq_server.cpp b/src/rpc/zmq_server.cpp
index 96aaee8f4..d99f4fb7d 100644
--- a/src/rpc/zmq_server.cpp
+++ b/src/rpc/zmq_server.cpp
@@ -48,6 +48,7 @@ namespace
   constexpr const int num_zmq_threads = 1;
   constexpr const std::int64_t max_message_size = 10 * 1024 * 1024; // 10 MiB
   constexpr const std::chrono::seconds linger_timeout{2}; // wait period for pending out messages
+  constexpr const int ipv6_option = 1;
 
   net::zmq::socket init_socket(void* context, int type, epee::span<const std::string> addresses)
   {
@@ -75,6 +76,12 @@ namespace
       return nullptr;
     }
 
+    if (zmq_setsockopt(out.get(), ZMQ_IPV6, std::addressof(ipv6_option), sizeof(ipv6_option)) != 0)
+    {
+        MONERO_LOG_ZMQ_ERROR("Failed to enable IPv6");
+        return nullptr;
+    }
+
     for (const std::string& address : addresses)
     {
       if (zmq_bind(out.get(), address.c_str()) < 0)