diff --git a/accel-pppd/radius/radius_p.h b/accel-pppd/radius/radius_p.h
index cd9a0ab4..87613624 100644
--- a/accel-pppd/radius/radius_p.h
+++ b/accel-pppd/radius/radius_p.h
@@ -95,6 +95,7 @@ struct rad_req_t {
 	struct rad_server_t *serv;
 
 	in_addr_t server_addr;
+	struct in6_addr server_ipv6_addr;
 
 	int server_port;
 	int type;
@@ -120,6 +121,7 @@ struct rad_server_t {
 	struct triton_timer_t timer;
 	int id;
 	in_addr_t addr;
+	struct in6_addr addr6;
 	char *secret;
 	int auth_port;
 	int acct_port;
@@ -165,6 +167,8 @@ struct rad_server_t {
 	unsigned int acct_on:1;
 	unsigned int need_free:1;
 	unsigned int need_close:1;
+	//Flag to set radius ip version
+	unsigned int ipv4:1;
 };
 
 #define RAD_SERV_AUTH 0
diff --git a/accel-pppd/radius/req.c b/accel-pppd/radius/req.c
index 11abf8cb..be74f047 100644
--- a/accel-pppd/radius/req.c
+++ b/accel-pppd/radius/req.c
@@ -53,6 +53,7 @@ static struct rad_req_t *__rad_req_alloc(struct radius_pd_t *rpd, int code, cons
 		goto out_err;
 
 	req->server_addr = req->serv->addr;
+	req->server_ipv6_addr = req->serv->addr6;
 	req->server_port = req->serv->auth_port;
 
 	while (1) {
@@ -268,47 +269,71 @@ void rad_req_free(struct rad_req_t *req)
 
 static int make_socket(struct rad_req_t *req)
 {
-  struct sockaddr_in addr;
+    if (req->serv->ipv4) {
+		struct sockaddr_in addr;
 
-	req->hnd.fd = socket(PF_INET, SOCK_DGRAM, 0);
-	if (req->hnd.fd < 0) {
-		log_ppp_error("radius:socket: %s\n", strerror(errno));
-		return -1;
-	}
+		req->hnd.fd = socket(PF_INET, SOCK_DGRAM, 0);
+		if (req->hnd.fd < 0) {
+			log_ppp_error("radius:socket: %s\n", strerror(errno));
+			return -1;
+		}
 
-	fcntl(req->hnd.fd, F_SETFD, fcntl(req->hnd.fd, F_GETFD) | FD_CLOEXEC);
+		fcntl(req->hnd.fd, F_SETFD, fcntl(req->hnd.fd, F_GETFD) | FD_CLOEXEC);
+
+		memset(&addr, 0, sizeof(addr));
+		addr.sin_family = AF_INET;
+
+		if (conf_bind) {
+			addr.sin_addr.s_addr = conf_bind;
+			if (bind(req->hnd.fd, (struct sockaddr *) &addr, sizeof(addr))) {
+				log_ppp_error("radius:bind: %s\n", strerror(errno));
+				goto out_err;
+			}
+		}
 
-	memset(&addr, 0, sizeof(addr));
-	addr.sin_family = AF_INET;
+		addr.sin_addr.s_addr = req->server_addr;
+		addr.sin_port = htons(req->server_port);
 
-	if (conf_bind) {
-		addr.sin_addr.s_addr = conf_bind;
-		if (bind(req->hnd.fd, (struct sockaddr *) &addr, sizeof(addr))) {
-			log_ppp_error("radius:bind: %s\n", strerror(errno));
+		if ( req->serv && !req->serv->bind_default && ( 0 > setsockopt(req->hnd.fd, SOL_SOCKET, SO_BINDTODEVICE, req->serv->bind_device, strlen(req->serv->bind_device)) ) )
+		{
+			log_ppp_error("radius:setsockopt: %s\n", strerror(errno));
 			goto out_err;
 		}
-	}
 
-	addr.sin_addr.s_addr = req->server_addr;
-	addr.sin_port = htons(req->server_port);
+		if (connect(req->hnd.fd, (struct sockaddr *) &addr, sizeof(addr))) {
+			log_ppp_error("radius:connect: %s\n", strerror(errno));
+			goto out_err;
+		}
 
-	if ( req->serv && !req->serv->bind_default && ( 0 > setsockopt(req->hnd.fd, SOL_SOCKET, SO_BINDTODEVICE, req->serv->bind_device, strlen(req->serv->bind_device)) ) )
-	{
-		log_ppp_error("radius:setsockopt: %s\n", strerror(errno));
-		goto out_err;
-	}
+		if (fcntl(req->hnd.fd, F_SETFL, O_NONBLOCK)) {
+			log_ppp_error("radius: failed to set nonblocking mode: %s\n", strerror(errno));
+			goto out_err;
+		}
 
-	if (connect(req->hnd.fd, (struct sockaddr *) &addr, sizeof(addr))) {
-		log_ppp_error("radius:connect: %s\n", strerror(errno));
-		goto out_err;
-	}
+		return 0;
 
-	if (fcntl(req->hnd.fd, F_SETFL, O_NONBLOCK)) {
-		log_ppp_error("radius: failed to set nonblocking mode: %s\n", strerror(errno));
-		goto out_err;
-	}
+	}else {//ipv6 address
+		struct sockaddr_in6 addr6;
 
-	return 0;
+		req->hnd.fd = socket(AF_INET6, SOCK_DGRAM, 0);
+		if (req->hnd.fd < 0) {
+			log_ppp_error("radius:socket: %s\n", strerror(errno));
+			return -1;
+		}
+
+		fcntl(req->hnd.fd, F_SETFD, fcntl(req->hnd.fd, F_GETFD) | FD_CLOEXEC);
+
+		memset(&addr6, 0, sizeof(addr6));
+		addr6.sin6_family = AF_INET6;
+		addr6.sin6_addr = req->server_ipv6_addr;
+		addr6.sin6_port = htons(req->server_port);
+
+		if (connect(req->hnd.fd, (struct sockaddr *) &addr6, sizeof(addr6))) {
+			log_ppp_error("radius:connect: %s\n", strerror(errno));
+			goto out_err;
+		}
+		return 0;
+	}
 
 out_err:
 	if (req->hnd.tpd)
diff --git a/accel-pppd/radius/serv.c b/accel-pppd/radius/serv.c
index 4339d301..4af6a67a 100644
--- a/accel-pppd/radius/serv.c
+++ b/accel-pppd/radius/serv.c
@@ -485,10 +485,15 @@ static void serv_ctx_close(struct triton_context_t *ctx)
 
 static void show_stat(struct rad_server_t *s, void *client)
 {
-	char addr[17];
+	char addr[INET6_ADDRSTRLEN];  // Sufficient size for both IPv4 and IPv6 addresses
 	struct timespec ts;
 
-	u_inet_ntoa(s->addr, addr);
+	if (s->ipv4) {
+		u_inet_ntoa(s->addr, addr);
+	} else {
+		inet_ntop(AF_INET6, &s->addr6, addr, sizeof(addr));
+	}
+
 	clock_gettime(CLOCK_MONOTONIC, &ts);
 
 	cli_sendv(client, "radius(%i, %s):\r\n", s->id, addr);
@@ -725,7 +730,20 @@ static int parse_server1(const char *_opt, struct rad_server_t *s)
 	if (ptr3)
 		*ptr3 = 0;
 
-	s->addr = inet_addr(opt);
+    struct in_addr addr4;
+    if (inet_pton(AF_INET, opt, &addr4) == 1) {
+        s->ipv4 = 1;
+        s->addr = addr4.s_addr;
+    }else {
+        struct in6_addr addr6;
+        if (inet_pton(AF_INET6, opt, &addr6) == 1) {
+            s->ipv4 = 0;
+            s->addr6 = addr6;
+        } else {
+            log_error("Invalid server address");
+            goto out;
+        }
+    }
 
 	if (ptr2) {
 		if (ptr2[1]) {
@@ -774,8 +792,20 @@ static int parse_server2(const char *_opt, struct rad_server_t *s)
 
 	*ptr1 = 0;
 
-	s->addr = inet_addr(opt);
-
+    struct in_addr addr4;
+    if (inet_pton(AF_INET, opt, &addr4) == 1) {
+        s->ipv4 = 1;
+        s->addr = addr4.s_addr;
+    }else {
+        struct in6_addr addr6;
+        if (inet_pton(AF_INET6, opt, &addr6) == 1) {
+            s->ipv4 = 0;
+            s->addr6 = addr6;
+        } else {
+            log_error("Invalid server address");
+            goto out;
+        }
+    }
 	ptr3 = strstr(ptr2, ",auth-port=");
 	if (ptr3) {
 		s->auth_port = strtol(ptr3 + 11, &endptr, 10);