Unable to connect to acme-v01.api.letsencrypt.org

roberto@cs1-cal4.mil> traceroute 23.45.101.142 source 46.252.148.1
traceroute to 23.45.101.142 (23.45.101.142) from 46.252.148.1, 30 hops max, 40 byte packets
1  cr2-xe-1-3-0-0-cal4.mil.kpnqwest.it (94.141.0.137)  27.713 ms  1.090 ms  0.954 ms
2  cr1-xe-0-0-3-0-cal4.mil.kpnqwest.it (94.141.0.201)  6.380 ms  1.298 ms  5.154 ms
     MPLS Label=763825 CoS=0 TTL=1 S=1
3  cr2-tenge4-4-cal1.mil.kpnqwest.it (94.141.0.225)  4.837 ms  1.809 ms  1.320 ms
     MPLS Label=11590 CoS=0 TTL=1 S=1
4  br1-xe-0-1-0-0-cal1.mil.kpnqwest.it (195.43.160.14)  2.510 ms  1.929 ms  1.474 ms
5  xe2-2-2.milano51.mil.seabone.net (93.186.128.150)  1.243 ms  1.273 ms  2.881 ms
6  ae20.franco32.fra.seabone.net (195.22.211.104)  29.502 ms ae19.franco32.fra.seabone.net (195.22.211.36)  23.428 ms ae20.franco32.fra.seabone.net (195.22.211.104)  30.542 ms
7  * * *
8  * * *
^C
{master:0}

roberto@cs1-cal4.mil> traceroute 23.45.101.142
traceroute to 23.45.101.142 (23.45.101.142), 30 hops max, 40 byte packets
1  cr2-xe-1-3-0-0-cal4.mil.kpnqwest.it (94.141.0.137)  1.463 ms  1.041 ms  0.985 ms
2  cr1-xe-0-0-3-0-cal4.mil.kpnqwest.it (94.141.0.201)  4.531 ms  2.253 ms  1.329 ms
     MPLS Label=763825 CoS=0 TTL=1 S=1
3  cr2-tenge4-4-cal1.mil.kpnqwest.it (94.141.0.225)  163.686 ms  207.159 ms  4.111 ms
     MPLS Label=11590 CoS=0 TTL=1 S=1
4  br1-xe-0-1-0-0-cal1.mil.kpnqwest.it (195.43.160.14)  1.316 ms  2.441 ms  1.676 ms
5  xe2-2-2.milano51.mil.seabone.net (93.186.128.150)  1.352 ms  1.786 ms  1.281 ms
6  ae19.franco32.fra.seabone.net (195.22.211.36)  13.424 ms ae20.franco32.fra.seabone.net (195.22.211.104)  11.277 ms ae19.franco32.fra.seabone.net (195.22.211.36)  11.509 ms
7  akamai-row.franco32.fra.seabone.net (195.22.214.3)  15.348 ms  23.675 ms  14.360 ms
8  a23-45-101-142.deploy.static.akamaitechnologies.com (23.45.101.142)  21.840 ms  31.073 ms  19.898 ms
{master:0}

roberto@cs1-cal4.mil> traceroute 23.45.101.142 source 46.252.148.1
traceroute to 23.45.101.142 (23.45.101.142) from 46.252.148.1, 30 hops max, 40 byte packets
1  cr2-xe-1-3-0-0-cal4.mil.kpnqwest.it (94.141.0.137)  1.284 ms  2.654 ms  6.270 ms
2  cr1-tenge4-4-cal2.mil.kpnqwest.it (94.141.0.189)  10.462 ms  1.454 ms  11.309 ms
3  br1-xe-0-0-0-0-cal2.mil.kpnqwest.it (195.43.160.110)  1.727 ms  6.104 ms  3.684 ms
4  mno-b2-link.telia.net (213.248.86.65)  3.124 ms  1.569 ms  5.190 ms
5  mei-b2-link.telia.net (62.115.133.185)  9.232 ms  8.273 ms  8.030 ms
6  telecomitalia-ic-324366-mei-b2.c.telia.net (62.115.154.77)  8.780 ms  14.132 ms  15.078 ms
7  ae19.franco32.fra.seabone.net (195.22.211.36)  28.713 ms  28.016 ms ae20.franco32.fra.seabone.net (195.22.211.104)  45.217 ms
8  * *