Fusebox at the Hotel Alchemy, image by Daniel Y. Harris
Verification of
Unspoofed Source Addresses
1
2: 1 5: 1 8 . 9 1 3 1 8 4 IP ( t o s 0 x0 , t t l
3
6 , i d 2 0 3 3 5 , o f f s e t 0 , f l a g s [ none ],
p
r o t o UDP ( 1 7 ) , l e n g t h 4 1 2 ) XX. 1 0.
1
0 0 . 9 0 . 1 8 7 8 > XX. 1 6 4 . 3 0 . 5 6 . 5 0 6
0 : [ udp sum ok ] SIP , l e n g t h : 384 2
REGI
STER
s i p : 3 9 8 2 5 1 6 0 6 8@XX. 1 6 4 . 3 0
.
5 6 S IP / 2 . 0 3 Via : S IP / 2 . 0 / UDP XX. 1
6 4 . 3 0 . 5 6 : 5 0 6 0 ; b r a n c h =1
F8b5C6T
44G2CJt
; r p o r t 4 C o nt e nt−Le n gt h : 0 5
From
: < s i p : 3 9 8 2 5 1 6 0 6 8@XX. 1 6 4.
3
0 . 5 6 > ; t a g =14718138184028634232183
42668
6 Acce pt : a p p l i c a t i o n / s d p 7 U
se
r−Agent : A s t e r i s k PBX 8 To : < s i p : 3
9
8 2 5 1 6 0 6 8@XX. 1 6 4 . 3 0 . 5 6 > 9 C o n
5
6 10 CSeq : 1 REGISTER 11 C all−ID : 47310.
—Mat
Rix
