用集团网，XP，Vista下都能拨号，但Ubuntu不能连上

问题描述：

用集团网，XP，Vista下都能拨号，但Ubuntu8.10不能连上，信息如下：

root@brqg88-desktop:/home/brqg88# plog
Nov 24 01:10:57 brqg88-desktop pppd[8923]: CHAP authentication succeeded
Nov 24 01:10:57 brqg88-desktop pppd[8923]: peer from calling number 00:90:27:C1:4D:09 authorized
Nov 24 01:10:57 brqg88-desktop pppd[8923]: Cannot determine ethernet address for proxy ARP
Nov 24 01:10:57 brqg88-desktop pppd[8923]: local IP address 10.0.3.96
Nov 24 01:10:57 brqg88-desktop pppd[8923]: remote IP address 10.96.12.1
Nov 24 01:10:57 brqg88-desktop pppd[8923]: primary DNS address 10.96.12.1
Nov 24 01:10:57 brqg88-desktop pppd[8923]: secondary DNS address 202.96.128.166
Nov 24 01:10:57 brqg88-desktop pppd[8923]: LCP terminated by peer (Encryption negotiation rejected)
Nov 24 01:10:57 brqg88-desktop pppd[8923]: Connect time 0.0 minutes.
Nov 24 01:10:57 brqg88-desktop pppd[8923]: Sent 0 bytes, received 0 bytes.
Nov 24 01:10:57 brqg88-desktop pppd[8923]: Cannot determine ethernet address for proxy ARP说明了不能连接吧？
还有，

问题解答：

按日志来说，是有成功连接呀。
楼主你所说的集团网是啥东东？

Nov 24 01:10:57 brqg88-desktop pppd[8923]: local IP address 10.0.3.96
Nov 24 01:10:57 brqg88-desktop pppd[8923]: remote IP address 10.96.12.1
Nov 24 01:10:57 brqg88-desktop pppd[8923]: primary DNS address 10.96.12.1
Nov 24 01:10:57 brqg88-desktop pppd[8923]: secondary DNS address 202.96.128.166
这段记录是表示有获取到IP和DNS数据呀。

pppoeconf???????