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lft

Created by dave. Last edited by dave, 71 days ago. Viewed 51 times. #2
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(2017-09-12)

lft (Layer Four Traceroute)

>>For Fedora 24/25/26

(Note this comes in a repo format, but it has a ton of other stuff in the repo that I know nothing about; besides, lft installs stand-alone so no need for the repo.)

Example:

$ sudo lft -NA yahoo.ca
Tracing ...............*****................T
TTL LFT trace to aviate.yahoo.com (74.6.50.24):80/tcp
 1  [AS?] [NULL] gateway (172.30.1.254) 0.8/0.9ms
 2  [812] [TOL-72-1-205-128-255] 72.1.205.131 2.1/1.4ms
 3  [812] [TOL-72-1-205-128-255] 72.1.205.129 2.2/4.3ms
 4  [812] [TOL-IPBLOCK-1] 72.1.207.33 4.1/4.5ms
 5  [812] [ROGERS-COM-RTI] 209.148.251.81 4.0/4.8ms
 6  [812] [ROGERS-COM-RTI] 209.148.251.94 9.1/6.7ms
 7  [812] [ROGERS-COM-INUK] 24.156.144.42 9.8/5.5ms
 8  [812] [ROGERS-COM-RTI] 209.148.229.229 9.4/9.9ms
 9  [812] [ROGERS-COM-RTI] 209.148.230.134 30.1/21.6ms
**  [neglected] no reply packets received from TTL 10
11  [10310] [A-YAHOO-US2] ae-0.pat2.bfy.yahoo.com (216.115.97.204) 32.5/32.1ms
12  [10310] [A-YAHOO-US2] unknown-216-115-104-x.yahoo.com (216.115.104.77) 28.5/29.4ms
13  [10310] [INKTOMI-BLK-5] unknown-72-30-223-x.yahoo.com (72.30.223.27) 29.3/28.3ms
14  [26101] [INKTOMI-BLK-6] unknown-74-6-122-x.yahoo.com (74.6.122.91) 28.3/29.7ms
15  [26101] [INKTOMI-BLK-5] po8.fab1-1-gdc.bf1.yahoo.com (72.30.22.33) 29.8/31.5ms
16  [26101] [A-YAHOO-US5] po-9.bas1-10-prd.bf1.yahoo.com (69.147.72.129) 30.6/30.7ms
**  [neglected] no reply packets received from TTLs 17 through 20
21  [26101] [INKTOMI-BLK-6] [target open] aviate.yahoo.com (74.6.50.24):80 31.3ms

The .src.rpm from Fedora 26 file builds on CentOS 7.

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