diff --git a/canohost.c b/canohost.c
index a61a8c9..97ce58c 100644
--- a/canohost.c
+++ b/canohost.c
@@ -165,12 +165,29 @@ check_ip_options(int sock, char *ipaddr)
 	option_size = sizeof(options);
 	if (getsockopt(sock, ipproto, IP_OPTIONS, options,
 	    &option_size) >= 0 && option_size != 0) {
-		text[0] = '\0';
-		for (i = 0; i < option_size; i++)
-			snprintf(text + i*3, sizeof(text) - i*3,
-			    " %2.2x", options[i]);
-		fatal("Connection from %.100s with IP options:%.800s",
-		    ipaddr, text);
+		i = 0;
+		do {
+			switch (options[i]) {
+				case 0:
+				case 1:
+					++i;
+					break;
+				case 130:
+				case 133:
+				case 134:
+					i += options[i + 1];
+					break;
+				default:
+				/* Fail, fatally, if we detect either loose or strict
+			 	 * source routing options. */
+					text[0] = '\0';
+					for (i = 0; i < option_size; i++)
+						snprintf(text + i*3, sizeof(text) - i*3,
+							" %2.2x", options[i]);
+					fatal("Connection from %.100s with IP options:%.800s",
+						ipaddr, text);
+			}
+		} while (i < option_size);
 	}
 #endif /* IP_OPTIONS */
 }