diff --git a/app/nginx-1.11.10/src/event/modules/ngx_ff_module.c b/app/nginx-1.11.10/src/event/modules/ngx_ff_module.c
index 11e1e06c..1aba3a19 100644
--- a/app/nginx-1.11.10/src/event/modules/ngx_ff_module.c
+++ b/app/nginx-1.11.10/src/event/modules/ngx_ff_module.c
@@ -219,7 +219,7 @@ fstack_territory(int domain, int type, int protocol)
     type &= ~SOCK_NONBLOCK;
     type &= ~SOCK_FSTACK;
 
-    if ((AF_INET != domain) || (SOCK_STREAM != type && SOCK_DGRAM != type)) {
+    if ((AF_INET != domain && AF_INET6 != domain) || (SOCK_STREAM != type && SOCK_DGRAM != type)) {
         return 0;
     }
 
@@ -231,14 +231,20 @@ socket(int domain, int type, int protocol)
 {
     int sock;
     if (unlikely(inited == 0)) {
+        if (AF_INET6 == domain)
+            domain = AF_INET6_LINUX;
         return SYSCALL(socket)(domain, type, protocol);
     }
 
     if (unlikely(fstack_territory(domain, type, protocol) == 0)) {
+        if (AF_INET6 == domain)
+            domain = AF_INET6_LINUX;
         return SYSCALL(socket)(domain, type, protocol);
     }
 
     if (unlikely((type & SOCK_FSTACK) == 0)) {
+        if (AF_INET6 == domain)
+            domain = AF_INET6_LINUX;
         return SYSCALL(socket)(domain, type, protocol);
     }
 
diff --git a/app/nginx-1.16.0/src/event/modules/ngx_ff_module.c b/app/nginx-1.16.0/src/event/modules/ngx_ff_module.c
index 11e1e06c..1aba3a19 100644
--- a/app/nginx-1.16.0/src/event/modules/ngx_ff_module.c
+++ b/app/nginx-1.16.0/src/event/modules/ngx_ff_module.c
@@ -219,7 +219,7 @@ fstack_territory(int domain, int type, int protocol)
     type &= ~SOCK_NONBLOCK;
     type &= ~SOCK_FSTACK;
 
-    if ((AF_INET != domain) || (SOCK_STREAM != type && SOCK_DGRAM != type)) {
+    if ((AF_INET != domain && AF_INET6 != domain) || (SOCK_STREAM != type && SOCK_DGRAM != type)) {
         return 0;
     }
 
@@ -231,14 +231,20 @@ socket(int domain, int type, int protocol)
 {
     int sock;
     if (unlikely(inited == 0)) {
+        if (AF_INET6 == domain)
+            domain = AF_INET6_LINUX;
         return SYSCALL(socket)(domain, type, protocol);
     }
 
     if (unlikely(fstack_territory(domain, type, protocol) == 0)) {
+        if (AF_INET6 == domain)
+            domain = AF_INET6_LINUX;
         return SYSCALL(socket)(domain, type, protocol);
     }
 
     if (unlikely((type & SOCK_FSTACK) == 0)) {
+        if (AF_INET6 == domain)
+            domain = AF_INET6_LINUX;
         return SYSCALL(socket)(domain, type, protocol);
     }