公开免费的stun服务器，解决内外网问题

http://blog.sina.com.cn/s/blog_683d26990100oucy.html

stunserver.org 测试是OK的
stun.xten.com / [$ y# L) M( t# y2 r" Z, E
   D! D% D8 I$ L0 V: H! S4 G) Q3 |" V7 f3 r
stun.fwdnet.net 4 n2 a4 e! a6 p7 O, M! W0 I- _
stun.fwdnet.net:3478 " Q, }" @1 o; t* G: }7 N' P; u

stun.wirlab.net
# R$ V9 F& l- b/ A3 n$ M$ s
stun01.sipphone.com 5 E0 O' U+ @( ]$ t   U' U: o

stun.iptel.org 3 B8 t8 M( y# P   B8 @5 u
: g   s. n0 \4 ^stun.ekiga.net
stun.fwdnet.net . C- V% T- ]& }
stun01.sipphone.com (no DNS SRV record) ! B% d1 Y: n9 F! |) R2 @& f
stun.softjoys.com (no DNS SRV record) / G: y0 m+ J! o" z( f* P
stun.voipbuster.com (no DNS SRV record) " v! x! L) E# z" j
stun.voxgratia.org (no DNS SRV record)
stun.xten.com # d   k+ f# Q5 T% W* @5 P
stunserver.org
- j6 P1 A8 S0 A# n$ Z, y: z
stun.sipgate.net:10000
stun.softjoys.com:3478