diff --git a/integrated-security/web-overflow-client/_0/server b/integrated-security/web-overflow-client/_0/server
index fbe103e7..ae01492a 100755
Binary files a/integrated-security/web-overflow-client/_0/server and b/integrated-security/web-overflow-client/_0/server differ
diff --git a/integrated-security/web-overflow-client/_0/server.c b/integrated-security/web-overflow-client/_0/server.c
index 1a08bb23..00f5a123 100644
--- a/integrated-security/web-overflow-client/_0/server.c
+++ b/integrated-security/web-overflow-client/_0/server.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow-client/_1/server b/integrated-security/web-overflow-client/_1/server
index e2725f1f..df5e6c88 100755
Binary files a/integrated-security/web-overflow-client/_1/server and b/integrated-security/web-overflow-client/_1/server differ
diff --git a/integrated-security/web-overflow-client/_1/server.c b/integrated-security/web-overflow-client/_1/server.c
index 1d1c5f11..45433131 100644
--- a/integrated-security/web-overflow-client/_1/server.c
+++ b/integrated-security/web-overflow-client/_1/server.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow-client/_10/server b/integrated-security/web-overflow-client/_10/server
index 2b8f55b8..12205712 100755
Binary files a/integrated-security/web-overflow-client/_10/server and b/integrated-security/web-overflow-client/_10/server differ
diff --git a/integrated-security/web-overflow-client/_10/server.c b/integrated-security/web-overflow-client/_10/server.c
index b33e7f42..a745f5e6 100644
--- a/integrated-security/web-overflow-client/_10/server.c
+++ b/integrated-security/web-overflow-client/_10/server.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow-client/_11/server b/integrated-security/web-overflow-client/_11/server
index 382a5e68..54d3e328 100755
Binary files a/integrated-security/web-overflow-client/_11/server and b/integrated-security/web-overflow-client/_11/server differ
diff --git a/integrated-security/web-overflow-client/_11/server.c b/integrated-security/web-overflow-client/_11/server.c
index 592536de..a21a4ba1 100644
--- a/integrated-security/web-overflow-client/_11/server.c
+++ b/integrated-security/web-overflow-client/_11/server.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow-client/_12/server b/integrated-security/web-overflow-client/_12/server
index 1b68ef4d..eba27d60 100755
Binary files a/integrated-security/web-overflow-client/_12/server and b/integrated-security/web-overflow-client/_12/server differ
diff --git a/integrated-security/web-overflow-client/_12/server.c b/integrated-security/web-overflow-client/_12/server.c
index 46711cda..525ae72d 100644
--- a/integrated-security/web-overflow-client/_12/server.c
+++ b/integrated-security/web-overflow-client/_12/server.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow-client/_13/server b/integrated-security/web-overflow-client/_13/server
index 07254086..248ac40e 100755
Binary files a/integrated-security/web-overflow-client/_13/server and b/integrated-security/web-overflow-client/_13/server differ
diff --git a/integrated-security/web-overflow-client/_13/server.c b/integrated-security/web-overflow-client/_13/server.c
index eb2e0cb7..1c367e23 100644
--- a/integrated-security/web-overflow-client/_13/server.c
+++ b/integrated-security/web-overflow-client/_13/server.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow-client/_14/server b/integrated-security/web-overflow-client/_14/server
index 07254086..248ac40e 100755
Binary files a/integrated-security/web-overflow-client/_14/server and b/integrated-security/web-overflow-client/_14/server differ
diff --git a/integrated-security/web-overflow-client/_14/server.c b/integrated-security/web-overflow-client/_14/server.c
index eb2e0cb7..1c367e23 100644
--- a/integrated-security/web-overflow-client/_14/server.c
+++ b/integrated-security/web-overflow-client/_14/server.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow-client/_15/server b/integrated-security/web-overflow-client/_15/server
index 4d74232a..d0ab94d7 100755
Binary files a/integrated-security/web-overflow-client/_15/server and b/integrated-security/web-overflow-client/_15/server differ
diff --git a/integrated-security/web-overflow-client/_15/server.c b/integrated-security/web-overflow-client/_15/server.c
index 83915eb2..a7965503 100644
--- a/integrated-security/web-overflow-client/_15/server.c
+++ b/integrated-security/web-overflow-client/_15/server.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow-client/_2/server b/integrated-security/web-overflow-client/_2/server
index cdf70be6..e7dee0ee 100755
Binary files a/integrated-security/web-overflow-client/_2/server and b/integrated-security/web-overflow-client/_2/server differ
diff --git a/integrated-security/web-overflow-client/_2/server.c b/integrated-security/web-overflow-client/_2/server.c
index f196c34e..c500fbb7 100644
--- a/integrated-security/web-overflow-client/_2/server.c
+++ b/integrated-security/web-overflow-client/_2/server.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow-client/_3/server b/integrated-security/web-overflow-client/_3/server
index 09032435..46a24540 100755
Binary files a/integrated-security/web-overflow-client/_3/server and b/integrated-security/web-overflow-client/_3/server differ
diff --git a/integrated-security/web-overflow-client/_3/server.c b/integrated-security/web-overflow-client/_3/server.c
index 047a9d53..8b97518d 100644
--- a/integrated-security/web-overflow-client/_3/server.c
+++ b/integrated-security/web-overflow-client/_3/server.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow-client/_4/server b/integrated-security/web-overflow-client/_4/server
index 4c2ac58f..e1fd150d 100755
Binary files a/integrated-security/web-overflow-client/_4/server and b/integrated-security/web-overflow-client/_4/server differ
diff --git a/integrated-security/web-overflow-client/_4/server.c b/integrated-security/web-overflow-client/_4/server.c
index 1a363004..c0a3c5b3 100644
--- a/integrated-security/web-overflow-client/_4/server.c
+++ b/integrated-security/web-overflow-client/_4/server.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow-client/_5/server b/integrated-security/web-overflow-client/_5/server
index 657e0193..f8c317bd 100755
Binary files a/integrated-security/web-overflow-client/_5/server and b/integrated-security/web-overflow-client/_5/server differ
diff --git a/integrated-security/web-overflow-client/_5/server.c b/integrated-security/web-overflow-client/_5/server.c
index a94261cb..093aa3ee 100644
--- a/integrated-security/web-overflow-client/_5/server.c
+++ b/integrated-security/web-overflow-client/_5/server.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow-client/_6/server b/integrated-security/web-overflow-client/_6/server
index b6fd4603..639aafa1 100755
Binary files a/integrated-security/web-overflow-client/_6/server and b/integrated-security/web-overflow-client/_6/server differ
diff --git a/integrated-security/web-overflow-client/_6/server.c b/integrated-security/web-overflow-client/_6/server.c
index c168dedd..359cf401 100644
--- a/integrated-security/web-overflow-client/_6/server.c
+++ b/integrated-security/web-overflow-client/_6/server.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow-client/_7/server b/integrated-security/web-overflow-client/_7/server
index 16d56522..1271a8e5 100755
Binary files a/integrated-security/web-overflow-client/_7/server and b/integrated-security/web-overflow-client/_7/server differ
diff --git a/integrated-security/web-overflow-client/_7/server.c b/integrated-security/web-overflow-client/_7/server.c
index 85e9d784..5aa598f7 100644
--- a/integrated-security/web-overflow-client/_7/server.c
+++ b/integrated-security/web-overflow-client/_7/server.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow-client/_8/server b/integrated-security/web-overflow-client/_8/server
index 4de0b32d..2b40fa03 100755
Binary files a/integrated-security/web-overflow-client/_8/server and b/integrated-security/web-overflow-client/_8/server differ
diff --git a/integrated-security/web-overflow-client/_8/server.c b/integrated-security/web-overflow-client/_8/server.c
index 7ea9508e..1c047327 100644
--- a/integrated-security/web-overflow-client/_8/server.c
+++ b/integrated-security/web-overflow-client/_8/server.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow-client/_9/server b/integrated-security/web-overflow-client/_9/server
index 4c2ac58f..e1fd150d 100755
Binary files a/integrated-security/web-overflow-client/_9/server and b/integrated-security/web-overflow-client/_9/server differ
diff --git a/integrated-security/web-overflow-client/_9/server.c b/integrated-security/web-overflow-client/_9/server.c
index 1a363004..c0a3c5b3 100644
--- a/integrated-security/web-overflow-client/_9/server.c
+++ b/integrated-security/web-overflow-client/_9/server.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow/_0/integration-web-overflow b/integrated-security/web-overflow/_0/integration-web-overflow
index c11fbe6a..184a7ef6 100755
Binary files a/integrated-security/web-overflow/_0/integration-web-overflow and b/integrated-security/web-overflow/_0/integration-web-overflow differ
diff --git a/integrated-security/web-overflow/_0/integration-web-overflow.c b/integrated-security/web-overflow/_0/integration-web-overflow.c
index d9e28614..14f6d855 100644
--- a/integrated-security/web-overflow/_0/integration-web-overflow.c
+++ b/integrated-security/web-overflow/_0/integration-web-overflow.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow/_1/integration-web-overflow b/integrated-security/web-overflow/_1/integration-web-overflow
index 1bcef95f..565b3c81 100755
Binary files a/integrated-security/web-overflow/_1/integration-web-overflow and b/integrated-security/web-overflow/_1/integration-web-overflow differ
diff --git a/integrated-security/web-overflow/_1/integration-web-overflow.c b/integrated-security/web-overflow/_1/integration-web-overflow.c
index ea2eaa85..b2769c52 100644
--- a/integrated-security/web-overflow/_1/integration-web-overflow.c
+++ b/integrated-security/web-overflow/_1/integration-web-overflow.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow/_10/integration-web-overflow b/integrated-security/web-overflow/_10/integration-web-overflow
index 3ead0b60..33a6917d 100755
Binary files a/integrated-security/web-overflow/_10/integration-web-overflow and b/integrated-security/web-overflow/_10/integration-web-overflow differ
diff --git a/integrated-security/web-overflow/_10/integration-web-overflow.c b/integrated-security/web-overflow/_10/integration-web-overflow.c
index 4ec96d56..48257ae2 100644
--- a/integrated-security/web-overflow/_10/integration-web-overflow.c
+++ b/integrated-security/web-overflow/_10/integration-web-overflow.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow/_11/integration-web-overflow b/integrated-security/web-overflow/_11/integration-web-overflow
index 0f80a104..be0d45fb 100755
Binary files a/integrated-security/web-overflow/_11/integration-web-overflow and b/integrated-security/web-overflow/_11/integration-web-overflow differ
diff --git a/integrated-security/web-overflow/_11/integration-web-overflow.c b/integrated-security/web-overflow/_11/integration-web-overflow.c
index 932de8fd..f267d636 100644
--- a/integrated-security/web-overflow/_11/integration-web-overflow.c
+++ b/integrated-security/web-overflow/_11/integration-web-overflow.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow/_12/integration-web-overflow b/integrated-security/web-overflow/_12/integration-web-overflow
index e57eab29..f91c7199 100755
Binary files a/integrated-security/web-overflow/_12/integration-web-overflow and b/integrated-security/web-overflow/_12/integration-web-overflow differ
diff --git a/integrated-security/web-overflow/_12/integration-web-overflow.c b/integrated-security/web-overflow/_12/integration-web-overflow.c
index 10854a95..342b6885 100644
--- a/integrated-security/web-overflow/_12/integration-web-overflow.c
+++ b/integrated-security/web-overflow/_12/integration-web-overflow.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow/_13/integration-web-overflow b/integrated-security/web-overflow/_13/integration-web-overflow
index 0bebf400..c63b590c 100755
Binary files a/integrated-security/web-overflow/_13/integration-web-overflow and b/integrated-security/web-overflow/_13/integration-web-overflow differ
diff --git a/integrated-security/web-overflow/_13/integration-web-overflow.c b/integrated-security/web-overflow/_13/integration-web-overflow.c
index af98ded8..00231f04 100644
--- a/integrated-security/web-overflow/_13/integration-web-overflow.c
+++ b/integrated-security/web-overflow/_13/integration-web-overflow.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow/_14/integration-web-overflow b/integrated-security/web-overflow/_14/integration-web-overflow
index f9a94a41..3a660595 100755
Binary files a/integrated-security/web-overflow/_14/integration-web-overflow and b/integrated-security/web-overflow/_14/integration-web-overflow differ
diff --git a/integrated-security/web-overflow/_14/integration-web-overflow.c b/integrated-security/web-overflow/_14/integration-web-overflow.c
index fd3e0e44..e2eaff67 100644
--- a/integrated-security/web-overflow/_14/integration-web-overflow.c
+++ b/integrated-security/web-overflow/_14/integration-web-overflow.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow/_15/integration-web-overflow b/integrated-security/web-overflow/_15/integration-web-overflow
index f1dfa195..a078a12e 100755
Binary files a/integrated-security/web-overflow/_15/integration-web-overflow and b/integrated-security/web-overflow/_15/integration-web-overflow differ
diff --git a/integrated-security/web-overflow/_15/integration-web-overflow.c b/integrated-security/web-overflow/_15/integration-web-overflow.c
index 93da1633..2ebe5bee 100644
--- a/integrated-security/web-overflow/_15/integration-web-overflow.c
+++ b/integrated-security/web-overflow/_15/integration-web-overflow.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow/_2/integration-web-overflow b/integrated-security/web-overflow/_2/integration-web-overflow
index 3ead0b60..33a6917d 100755
Binary files a/integrated-security/web-overflow/_2/integration-web-overflow and b/integrated-security/web-overflow/_2/integration-web-overflow differ
diff --git a/integrated-security/web-overflow/_2/integration-web-overflow.c b/integrated-security/web-overflow/_2/integration-web-overflow.c
index 4ec96d56..48257ae2 100644
--- a/integrated-security/web-overflow/_2/integration-web-overflow.c
+++ b/integrated-security/web-overflow/_2/integration-web-overflow.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow/_3/integration-web-overflow b/integrated-security/web-overflow/_3/integration-web-overflow
index fc7922aa..c43e0e33 100755
Binary files a/integrated-security/web-overflow/_3/integration-web-overflow and b/integrated-security/web-overflow/_3/integration-web-overflow differ
diff --git a/integrated-security/web-overflow/_3/integration-web-overflow.c b/integrated-security/web-overflow/_3/integration-web-overflow.c
index d7a76594..ab927b2a 100644
--- a/integrated-security/web-overflow/_3/integration-web-overflow.c
+++ b/integrated-security/web-overflow/_3/integration-web-overflow.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow/_4/integration-web-overflow b/integrated-security/web-overflow/_4/integration-web-overflow
index b8e4691a..aa5f16f3 100755
Binary files a/integrated-security/web-overflow/_4/integration-web-overflow and b/integrated-security/web-overflow/_4/integration-web-overflow differ
diff --git a/integrated-security/web-overflow/_4/integration-web-overflow.c b/integrated-security/web-overflow/_4/integration-web-overflow.c
index f46c3a63..c9a515e1 100644
--- a/integrated-security/web-overflow/_4/integration-web-overflow.c
+++ b/integrated-security/web-overflow/_4/integration-web-overflow.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow/_5/integration-web-overflow b/integrated-security/web-overflow/_5/integration-web-overflow
index 507b40fd..fd529785 100755
Binary files a/integrated-security/web-overflow/_5/integration-web-overflow and b/integrated-security/web-overflow/_5/integration-web-overflow differ
diff --git a/integrated-security/web-overflow/_5/integration-web-overflow.c b/integrated-security/web-overflow/_5/integration-web-overflow.c
index 8ce8542e..d7a15450 100644
--- a/integrated-security/web-overflow/_5/integration-web-overflow.c
+++ b/integrated-security/web-overflow/_5/integration-web-overflow.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow/_6/integration-web-overflow b/integrated-security/web-overflow/_6/integration-web-overflow
index f1dfa195..a078a12e 100755
Binary files a/integrated-security/web-overflow/_6/integration-web-overflow and b/integrated-security/web-overflow/_6/integration-web-overflow differ
diff --git a/integrated-security/web-overflow/_6/integration-web-overflow.c b/integrated-security/web-overflow/_6/integration-web-overflow.c
index 93da1633..2ebe5bee 100644
--- a/integrated-security/web-overflow/_6/integration-web-overflow.c
+++ b/integrated-security/web-overflow/_6/integration-web-overflow.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow/_7/integration-web-overflow b/integrated-security/web-overflow/_7/integration-web-overflow
index 9b40c539..d6a29b04 100755
Binary files a/integrated-security/web-overflow/_7/integration-web-overflow and b/integrated-security/web-overflow/_7/integration-web-overflow differ
diff --git a/integrated-security/web-overflow/_7/integration-web-overflow.c b/integrated-security/web-overflow/_7/integration-web-overflow.c
index 98867fed..7ea0e5e5 100644
--- a/integrated-security/web-overflow/_7/integration-web-overflow.c
+++ b/integrated-security/web-overflow/_7/integration-web-overflow.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow/_8/integration-web-overflow b/integrated-security/web-overflow/_8/integration-web-overflow
index ff025210..aa6951a9 100755
Binary files a/integrated-security/web-overflow/_8/integration-web-overflow and b/integrated-security/web-overflow/_8/integration-web-overflow differ
diff --git a/integrated-security/web-overflow/_8/integration-web-overflow.c b/integrated-security/web-overflow/_8/integration-web-overflow.c
index 02fb9cad..8d159d7e 100644
--- a/integrated-security/web-overflow/_8/integration-web-overflow.c
+++ b/integrated-security/web-overflow/_8/integration-web-overflow.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);
 
diff --git a/integrated-security/web-overflow/_9/integration-web-overflow b/integrated-security/web-overflow/_9/integration-web-overflow
index 4fcca9f6..731e20ee 100755
Binary files a/integrated-security/web-overflow/_9/integration-web-overflow and b/integrated-security/web-overflow/_9/integration-web-overflow differ
diff --git a/integrated-security/web-overflow/_9/integration-web-overflow.c b/integrated-security/web-overflow/_9/integration-web-overflow.c
index 0adbb384..fc76c975 100644
--- a/integrated-security/web-overflow/_9/integration-web-overflow.c
+++ b/integrated-security/web-overflow/_9/integration-web-overflow.c
@@ -69,6 +69,7 @@ void send_file(int client_fd, char *path)
     response.head += sprintf(response.head, "Content-Length: %d\n", file_stat.st_size);
     response.head += sprintf(response.head, "\n");
     response.head += read(file_fd, response.head, file_stat.st_size);
+    REQUIRE(!strstr(response.content, "pwn.college"), 403);
     write(client_fd, response.content, response.head-response.content);
     close(file_fd);