hping - 使用 TCP/UDP ping 解决防火墙拦截 ICMP ping

使用场景

暴露在外网环境的服务通常会只对白名单内的来源机器开放服务使用的端口，比如 B 机器只对 A 机器开放 TCP 8999 端口，这样会导致 A ping B 收不到回包，无法查看 TTL 与丢包率。
hping 能指定 IP/ICMP/TCP/UDP 进行 ping, 对于上述场景，使用 hping 的 TCP 模式即可解决。

• hping 支持的模式

# hping --help

Mode
  default mode     TCP
  -0  --rawip      RAW IP mode
  -1  --icmp       ICMP mode
  -2  --udp        UDP mode
  -8  --scan       SCAN mode.
                   Example: hping --scan 1-30,70-90 -S www.target.host
  -9  --listen     listen mode

CentOS 安装 hping

yum install libpcap-devel
yum install tcl-devel
ln -s /usr/include/pcap/bpf.h /usr/include/net/bpf.h
make
rm -vf /usr/include/net/bpf.h
make install

cp -f hping3 /usr/sbin/
chmod 755 /usr/sbin/hping3
ln -s /usr/sbin/hping3 /usr/sbin/hping
ln -s /usr/sbin/hping3 /usr/sbin/hping2

例子

• ping tcp://www.baidu.com:80 with SYN packet

# hping www.baidu.com -p 80 -c 10 -d 100
HPING www.baidu.com (eth0 14.215.177.38): NO FLAGS are set, 40 headers + 100 data bytes
^C
--- www.baidu.com hping statistic ---
5 packets tramitted, 0 packets received, 100% packet loss
round-trip min/avg/max = 0.0/0.0/0.0 ms

可见 tcp ping 不通，下面指定 SYN 包 ping

# hping www.baidu.com -p 80 -c 10 -d 100 -S
HPING www.baidu.com (eth0 14.215.177.38): S set, 40 headers + 100 data bytes
len=40 ip=14.215.177.38 ttl=55 id=36665 sport=80 flags=SA seq=0 win=8192 rtt=31.6 ms
len=40 ip=14.215.177.38 ttl=52 id=36434 sport=80 flags=SA seq=1 win=512 rtt=31.7 ms
len=40 ip=14.215.177.38 ttl=52 id=26944 sport=80 flags=SA seq=2 win=512 rtt=30.7 ms
len=40 ip=14.215.177.38 ttl=52 id=7870 sport=80 flags=SA seq=3 win=8192 rtt=30.3 ms
len=40 ip=14.215.177.38 ttl=52 id=2621 sport=80 flags=SA seq=4 win=512 rtt=31.0 ms
len=40 ip=14.215.177.38 ttl=55 id=5075 sport=80 flags=SA seq=5 win=512 rtt=31.2 ms
len=40 ip=14.215.177.38 ttl=52 id=15209 sport=80 flags=SA seq=6 win=8192 rtt=30.1 ms
len=40 ip=14.215.177.38 ttl=55 id=24403 sport=80 flags=SA seq=7 win=512 rtt=29.5 ms
len=40 ip=14.215.177.38 ttl=52 id=6698 sport=80 flags=SA seq=8 win=512 rtt=31.4 ms
len=40 ip=14.215.177.38 ttl=52 id=24439 sport=80 flags=SA seq=9 win=8192 rtt=31.6 ms

--- www.baidu.com hping statistic ---
10 packets tramitted, 10 packets received, 0% packet loss
round-trip min/avg/max = 29.5/30.9/31.7 ms

• ping tcp://www.httpbin.org:80 with ACK packet

# hping www.httpbin.org -p 80 -c 10 -d 100 -A
HPING www.httpbin.org (eth0 54.175.219.8): A set, 40 headers + 100 data bytes
len=40 ip=54.175.219.8 ttl=39 DF id=37231 sport=80 flags=R seq=0 win=0 rtt=380.8 ms
len=40 ip=54.175.219.8 ttl=39 DF id=37232 sport=80 flags=R seq=1 win=0 rtt=366.1 ms
len=40 ip=54.175.219.8 ttl=38 DF id=37233 sport=80 flags=R seq=2 win=0 rtt=371.5 ms
len=40 ip=54.175.219.8 ttl=38 DF id=37234 sport=80 flags=R seq=3 win=0 rtt=383.4 ms
len=40 ip=54.175.219.8 ttl=39 DF id=37236 sport=80 flags=R seq=5 win=0 rtt=365.1 ms
len=40 ip=54.175.219.8 ttl=38 DF id=37237 sport=80 flags=R seq=6 win=0 rtt=379.8 ms
len=40 ip=54.175.219.8 ttl=38 DF id=37238 sport=80 flags=R seq=7 win=0 rtt=380.4 ms
len=40 ip=54.175.219.8 ttl=38 DF id=37239 sport=80 flags=R seq=8 win=0 rtt=367.9 ms
len=40 ip=54.175.219.8 ttl=39 DF id=37240 sport=80 flags=R seq=9 win=0 rtt=374.2 ms

--- www.httpbin.org hping statistic ---
10 packets tramitted, 9 packets received, 10% packet loss
round-trip min/avg/max = 365.1/374.4/383.4 ms