diff --git a/tcp.c b/tcp.c
index 1403da8..330e21a 100644
--- a/tcp.c
+++ b/tcp.c
@@ -1008,6 +1008,11 @@ static void tcp_conn_from_sock(struct ctx *c, int fd)
 
 		memset(&tc[s].a.a4.zero, 0, sizeof(tc[s].a.a4.zero));
 		memset(&tc[s].a.a4.one, 0xff, sizeof(tc[s].a.a4.one));
+
+		if (ntohl(sa4->sin_addr.s_addr) == INADDR_LOOPBACK ||
+		    ntohl(sa4->sin_addr.s_addr) == INADDR_ANY)
+			sa4->sin_addr.s_addr = c->gw4;
+
 		memcpy(&tc[s].a.a4.a, &sa4->sin_addr, sizeof(tc[s].a.a4.a));
 
 		tc[s].sock_port = sa4->sin_port;
@@ -1022,6 +1027,9 @@ static void tcp_conn_from_sock(struct ctx *c, int fd)
 	} else if (sa_l.ss_family == AF_INET6) {
 		struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)&sa_r;
 
+		if (IN6_IS_ADDR_LOOPBACK(&sa6->sin6_addr))
+			memcpy(&sa6->sin6_addr, &c->gw6, sizeof(c->gw6));
+
 		memcpy(&tc[s].a.a6, &sa6->sin6_addr, sizeof(tc[s].a.a6));
 
 		tc[s].sock_port = sa6->sin6_port;
diff --git a/udp.c b/udp.c
index dda3a68..7be88f6 100644
--- a/udp.c
+++ b/udp.c
@@ -84,6 +84,10 @@ void udp_sock_handler(struct ctx *c, int s, uint32_t events)
 		struct sockaddr_in *sr4 = (struct sockaddr_in *)&sr;
 		struct sockaddr_in *sl4 = (struct sockaddr_in *)&sl;
 
+		if (ntohl(sr4->sin_addr.s_addr) == INADDR_LOOPBACK ||
+		    ntohl(sr4->sin_addr.s_addr) == INADDR_ANY)
+			sr4->sin_addr.s_addr = c->gw4;
+
 		memcpy(&a6.s6_addr[12], &sr4->sin_addr, sizeof(sr4->sin_addr));
 		uh->source = sr4->sin_port;
 		uh->dest = sl4->sin_port;
@@ -94,6 +98,9 @@ void udp_sock_handler(struct ctx *c, int s, uint32_t events)
 		struct sockaddr_in6 *sr6 = (struct sockaddr_in6 *)&sr;
 		struct sockaddr_in6 *sl6 = (struct sockaddr_in6 *)&sl;
 
+		if (IN6_IS_ADDR_LOOPBACK(&sr6->sin6_addr))
+			memcpy(&sr6->sin6_addr, &c->gw6, sizeof(c->gw6));
+
 		uh->source = sr6->sin6_port;
 		uh->dest = sl6->sin6_port;
 		uh->len = htons(n + sizeof(*uh));