Re: strange routing / nat behavior
Alex Zhang wrote:
> 我也遇到过这种情况，在山东聊城家里ssh到除了PKU的任意计算机都显示
> 我的公网IP，但是联PKU的VPN显示的IPAddress是“上海市超级计算中心”
这种网络结构很制造麻烦的，我现在不便使用ekiga电话了，因为传入兰州的呼叫没办法处理。
从下面记录可以看出，从兰州到北京，在山西或陕西处做了NAT。
$ whois 123.138.24.244
% [whois.apnic.net node-2]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html
inetnum: 123.138.0.0 - 123.139.255.255
netname: UNICOM-SN
descr: China Unicom Shannxi province network
descr: China Unicom
country: CN
admin-c: CH1302-AP
tech-c: CH679-AP
remarks: service provider
status: ALLOCATED PORTABLE
mnt-by: APNIC-HM
mnt-lower: MAINT-CNCGROUP-SN
mnt-routes: MAINT-CNCGROUP-RR
remarks: -+-+-+-+-+-+-+-+-+-+-+-++-+-+-+-+-+-+-+-+-+-+-+-+-+-+
remarks: This object can only be updated by APNIC hostmasters.
remarks: To update this object, please contact APNIC
remarks: hostmasters and include your organisation's account
remarks: name in the subject line.
remarks: -+-+-+-+-+-+-+-+-+-+-+-++-+-+-+-+-+-+-+-+-+-+-+-+-+-+
changed: hm-changed@apnic.net 20070228
changed: hm-changed@apnic.net 20090508
source: APNIC
route: 123.138.0.0/15
descr: CNC Group CHINA169 Shanni Province Network
country: CN
origin: AS4837
mnt-by: MAINT-CNCGROUP-RR
changed: abuse@cnc-noc.net 20070228
source: APNIC
person: ChinaUnicom Hostmaster
nic-hdl: CH1302-AP
e-mail: abuse@chinaunicom.cn
address: No.21,Jin-Rong Street
address: Beijing,100140
address: P.R.China
phone: +86-10-66259940
fax-no: +86-10-66259764
country: CN
changed: abuse@chinaunicom.cn 20090408
mnt-by: MAINT-CNCGROUP
source: APNIC
person: CNCGroup-SN Hostmaster
nic-hdl: CH679-AP
e-mail: quyj@china-netcom.com
address: China Network Communication ,SVT
address: NO.2 GuangDe Road, High Tec Zone
address: Xi'an, Shannxi, China
phone: +86-29-88192060
fax-no: +86-29-88192037
country: CN
changed: quyj@china-netcom.com 20060119
mnt-by: MAINT-CNCGROUP-SN
source: APNIC
Reply to: