<s>
Looking	B-Application
Glass	I-Application
servers	I-Application
(	O
LG	O
servers	O
)	O
are	O
servers	O
on	O
the	O
Internet	O
running	O
one	O
of	O
a	O
variety	O
of	O
publicly	O
available	O
Looking	O
Glass	O
software	O
implementations	O
.	O
</s>
<s>
They	O
are	O
commonly	O
deployed	O
by	O
autonomous	B-Architecture
systems	I-Architecture
(	O
AS	O
)	O
to	O
offer	O
access	O
to	O
their	O
routing	B-Protocol
infrastructure	O
in	O
order	O
to	O
facilitate	O
debugging	O
network	O
issues	O
.	O
</s>
<s>
A	O
Looking	B-Application
Glass	I-Application
server	I-Application
is	O
accessed	O
remotely	O
for	O
the	O
purpose	O
of	O
viewing	O
routing	B-Protocol
information	I-Protocol
.	O
</s>
<s>
Essentially	O
,	O
the	O
server	B-Application
acts	O
as	O
a	O
limited	O
,	O
read-only	O
portal	O
to	O
routers	B-Protocol
of	O
whatever	O
organization	O
is	O
running	O
the	O
LG	O
server	B-Application
.	O
</s>
<s>
Typically	O
,	O
Looking	B-Application
Glass	I-Application
servers	I-Application
are	O
run	O
by	O
autonomous	B-Architecture
systems	I-Architecture
like	O
Internet	O
service	O
providers	O
(	O
ISPs	O
)	O
,	O
Network	O
Service	O
Providers	O
(	O
NSPs	O
)	O
,	O
and	O
Internet	B-Protocol
exchange	I-Protocol
points	I-Protocol
(	O
IXPs	B-Protocol
)	O
.	O
</s>
<s>
Looking	O
glasses	O
are	O
web	O
scripts	O
directly	O
connected	O
to	O
routers	B-Protocol
 '	O
admin	O
interfaces	O
such	O
as	O
telnet	B-Protocol
and	O
SSH	B-Protocol
.	O
</s>
<s>
These	O
scripts	O
are	O
designed	O
to	O
relay	O
textual	O
commands	O
from	O
the	O
web	O
to	O
the	O
router	B-Protocol
and	O
print	O
back	O
the	O
response	O
.	O
</s>
<s>
The	O
are	O
often	O
implemented	O
in	O
Perl	B-Language
PHP	B-Application
,	O
and	O
Python	B-Language
,	O
and	O
are	O
publicly	O
available	O
on	O
GitHub	B-Application
.	O
</s>
<s>
A	O
2014	O
paper	O
demonstrated	O
the	O
potential	O
security	O
concerns	O
of	O
Looking	B-Application
Glass	I-Application
servers	I-Application
,	O
noting	O
that	O
even	O
an	O
"	O
attacker	O
with	O
very	O
limited	O
resources	O
can	O
exploit	O
such	O
flaws	O
in	O
operators	O
 '	O
networks	O
and	O
gain	O
access	O
to	O
core	O
Internet	O
infrastructure	O
"	O
,	O
resulting	O
in	O
anything	O
from	O
traffic	O
disruption	O
to	O
global	O
Border	B-Protocol
Gateway	I-Protocol
Protocol	I-Protocol
(	O
BGP	B-Protocol
)	O
route	O
injection	O
.	O
</s>
<s>
This	O
is	O
due	O
in	O
part	O
because	O
looking	B-Application
glass	I-Application
servers	I-Application
are	O
"	O
an	O
often	O
overlooked	O
critical	O
part	O
of	O
an	O
operator	O
infrastructure	O
"	O
because	O
it	O
sits	O
at	O
the	O
intersection	O
of	O
the	O
public	O
internet	O
and	O
"	O
restricted	O
admin	O
consoles	O
"	O
.	O
</s>
