firewalk5.0 如何去扫描端口

sunxiawei

[root@centossecondary ~]# firewalk -n -p TCP -S 1-200 61.164.15.49 61.164.15.51     
Firewalk 5.0 [gateway ACL scanner]
Firewalk state initialization completed successfully.
TCP-based scan.
Ramping phase source port: 53, destination port: 33434
Hotfoot through 61.164.15.49 using 61.164.15.51 as a metric.
Ramping Phase:
1 (TTL  1): expired [192.168.0.1]
2 (TTL  2): expired [218.1.1.251]
3 (TTL  3): expired [218.1.63.121]
4 (TTL  4): expired [124.74.215.157]
5 (TTL  5): expired [61.152.86.198]
6 (TTL  6): expired [202.97.34.198]
7 (TTL  7): expired [61.164.17.38]
8 (TTL  : expired [220.191.156.90]
9 (TTL  9): terminal (rst) [61.164.15.51]
Scan aborted: metric responded before target; must not be en route.

Total packets sent:                9
Total packet errors:               0
Total packets caught               9
Total packets caught of interest   9
Total ports scanned                0
Total ports open:                  0
Total ports unknown:               0

本人扫出来的老是跳数，一直没有出现扫描端口的操作，这是怎么回事，希望某位大神能指点一下！谢谢！