...
<SrcName>ping.desy.de</SrcName>
Changing hostname
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[root@iepm01-el7 ~]# cat /etc/hostname
iepm01-el7.desy.de
[root@iepm01-el7 ~]# hostname ping
[root@iepm01-el7 ~]# hostname
ping
[root@iepm01-el7 ~]# vim /etc/hostname #To make it permanent edit this file
[root@iepm01-el7 ~]# sysctl kernel.hostname
kernel.hostname = ping |
traceroute.pl
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[root@iepm01-el7 ~]# cd /var/www/cgi-bin [root@iepm01-el7 cgi-bin]# wget 'http://www.slac.stanford.edu/comp/net/traceroute/traceroute.pl' --2017-04-26 23:24:01-- http://www.slac.stanford.edu/comp/net/traceroute/traceroute.pl Resolving www.slac.stanford.edu (www.slac.stanford.edu)... 134.79.197.200, 2620:114:d000:2716::200 Connecting to www.slac.stanford.edu (www.slac.stanford.edu)|134.79.197.200|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 48927 (48K) [text/plain] Saving to: âtraceroute.plâ 100%[======================================>] 48,927 71.4KB/s in 0.7s 2017-04-26 23:24:02 (71.4 KB/s) - âtraceroute.plâ saved [48927/48927] [root@iepm01-el7 cgi-bin]# ls -l traceroute.pl -rw-r--r-- 1 root root 48927 Sep 20 2016 traceroute.pl [root@iepm01-el7 cgi-bin]# chmod +x traceroute.pl [root@iepm01-el7 cgi-bin]# ls -l traceroute.pl -rwxr-xr-x 1 root root 48927 Sep 20 2016 2016 traceroute.pl |
http://ping.desy.de/cgi-bin/traceroute.pl works
Try and access the web server via URL http://iepm01-el17.desy.de/cgi-bin/traceroute.pl, I got
Found it has a DNS registration, it is pingable but from the Internet (SLAC) port 80 is not responding
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388cottrell@pinger:~$nslookup iepm01-el7.desy.de Server: 134.79.111.111 Address: 134.79.111.111#53 Non-authoritative answer: Name: iepm01-el7.desy.de Address: 131.169.5.47 391cottrell@pinger:~$ping iepm01-el7.desy.de PING iepm01-el7.desy.de (131.169.5.47) 56(84) bytes of data. 64 bytes from iepm01-el7.desy.de (131.169.5.47): icmp_seq=1 ttl=45 time=166 ms 64 bytes from iepm01-el7.desy.de (131.169.5.47): icmp_seq=2 ttl=45 time=167 ms 64 bytes from iepm01-el7.desy.de (131.169.5.47): icmp_seq=3 ttl=45 time=166 ms ^C --- iepm01-el7.desy.de ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2508ms rtt min/avg/max/mdev = 166.934/166.991/167.054/0.337 ms 389cottrell@pinger:~$telnet iepm01-el7.desy.de 80 Trying 131.169.5.47... telnet: connect to address 131.169.5.47: Connection refused Exit 1 |