Private application IP routing between two loops

Question

I was asked a question on oral exams:

You are accessing a website whose webserver is located in country A.
You are in Country B.
You know that the TCP / UDP Packets pass through Country C while traveling from Country B to Country A.
How will you avoid your packets to travel via Country C, and rather select a different route?

Any answers for this?

Answer 1

The topology looks like this (I annotated the web server as Zbelow):

  new fiber (in ASN 777)
     +-------+
     |       |
Z----A---C---B
     |   |   |
     <INTERNET>

Summary

, A B A B ¹. B (- /24) BGP B A-B B. B ASN ( ASN 777).

, , Z B, ISP- B eBGP ². A , Z -, B A ².

, eBGP , ISP ³; B A.

---

• - ; , ( , ). , coutries ( - ). , , , ... - , , .

• - Z B ASN, ASN 777. -paranoid ( ), Z Z ASN 777.

• , ISP , eBGP ( ASN ).

Answer 2

: ?

D, , B D C, D A C , , :

B → [E] → D → [F] → A,

E F - , .

, C C hina?: -)

Answer 3

You can use simple AS path filters so that you only know the path that does not cross the unwanted AS.