Linux traceroute命令详解程序员

    traceroute我们可以知道信息从你的计算机到互联网另一端的主机是走的什么路径。当然每次数据包由某一同样的出发点（source）到达某一同样的目的地(destination)走的路径可能会不一样，但基本上来说大部分时候所走的路由是相同的。

常见命令参数

Options: 
  -4                          Use IPv4 
  -6                          Use IPv6 
  -d  --debug                 Enable socket level debugging 
  -F  --dont-fragment         Do not fragment packets 
  -f first_ttl  --first=first_ttl 
                              Start from the first_ttl hop (instead from 1) 
  -g gate,...  --gateway=gate,... 
                              Route packets through the specified gateway 
                              (maximum 8 for IPv4 and 127 for IPv6) 
  -I  --icmp                  Use ICMP ECHO for tracerouting 
  -T  --tcp                   Use TCP SYN for tracerouting 
  -i device  --interface=device 
                              Specify a network interface to operate with 
  -m max_ttl  --max-hops=max_ttl 
                              Set the max number of hops (max TTL to be 
                              reached). Default is 30 
  -N squeries  --sim-queries=squeries 
                              Set the number of probes to be tried 
                              simultaneously (default is 16) 
  -n                          Do not resolve IP addresses to their domain names 
  -p port  --port=port        Set the destination port to use. It is either 
                              initial udp port value for "default" method 
                              (incremented by each probe, default is 33434), or 
                              initial seq for "icmp" (incremented as well, 
                              default from 1), or some constant destination 
                              port for other methods (with default of 80 for 
                              "tcp", 53 for "udp", etc.) 
  -t tos  --tos=tos           Set the TOS (IPv4 type of service) or TC (IPv6 
                              traffic class) value for outgoing packets 
  -l flow_label  --flowlabel=flow_label 
                              Use specified flow_label for IPv6 packets 
  -w waittime  --wait=waittime 
                              Set the number of seconds to wait for response to 
                              a probe (default is 5.0). Non-integer (float 
                              point) values allowed too 
  -q nqueries  --queries=nqueries 
                              Set the number of probes per each hop. Default is 
                              3 
  -r                          Bypass the normal routing and send directly to a 
                              host on an attached network 
  -s src_addr  --source=src_addr 
                              Use source src_addr for outgoing packets 
  -z sendwait  --sendwait=sendwait 
                              Minimal time interval between probes (default 0). 
                              If the value is more than 10, then it specifies a 
                              number in milliseconds, else it is a number of 
                              seconds (float point values allowed too) 
  -e  --extensions            Show ICMP extensions (if present), including MPLS 
  -A  --as-path-lookups       Perform AS path lookups in routing registries and 
                              print results directly after the corresponding 
                              addresses 
  -M name  --module=name      Use specified module (either builtin or external) 
                              for traceroute operations. Most methods have 
                              their shortcuts (`-I' means `-M icmp' etc.) 
  -O OPTS,...  --options=OPTS,... 
                              Use module-specific option OPTS for the 
                              traceroute module. Several OPTS allowed, 
                              separated by comma. If OPTS is "help", print info 
                              about available options 
  --sport=num                 Use source port num for outgoing packets. Implies 
                              `-N 1' 
  -U  --udp                   Use UDP to particular port for tracerouting 
                              (instead of increasing the port per each probe), 
                              default port is 53 
  -UL                         Use UDPLITE for tracerouting (default dest port 
                              is 53) 
  -P prot  --protocol=prot    Use raw packet of protocol prot for tracerouting 
  --mtu                       Discover MTU along the path being traced. Implies 
                              `-F -N 1' 
  --back                      Guess the number of hops in the backward path and 
                              print if it differs 
  -V  --version               Print version info and exit 
  --help                      Read this help and exit

常见命令展示

多命令使用

traceroute -n -m 5 -q 4 -w 3 www.baidu.com

说明： -n 显示IP地址，不查主机名，  -m 设置跳数  

         -q 4每个网关发送4个数据包    -w 把对外发探测包的等待响应时间设置为3秒

探测包使用的基本UDP端口设置6888

traceroute -p 6888 www.baidu.com

绕过正常的路由表，直接发送到网络相连的主机

traceroute -r www.baidu.com