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Dial-up user with statically assigned ip-address

petrowic
Level 1
Level 1

Hi colleagues,

the problem description:

One Dial-up user statically inserts ip-address in tcpip properties and logs in successfully.

AS should terminate this session or assign address dynamically. Please , help me to configure AS correctly.

interface Serial1/0/0:15

description DIAL-UP ACCESS

no ip address

no ip directed-broadcast

encapsulation ppp

dialer-group 1

isdn switch-type primary-net5

isdn incoming-voice modem

no cdp enable

!

interface Group-Async1

description DIAL-UP ACCESS

ip unnumbered FastEthernet0/0/0

no ip redirects

no ip directed-broadcast

no ip proxy-arp

encapsulation ppp

async mode interactive

peer default ip address pool main

no cdp enable

ppp callback accept

ppp authentication chap pap

group-range 1/2/01 1/3/140

ip local pool main 192.168.0.100 192.168.0.254

line 1/2/01 1/3/140

session-timeout 25

autoselect during-login

autoselect ppp

script modem-off-hook offhook

script callback callback

login authentication admins

modem InOut

modem autoconfigure type Level

Best regards, Petr Akimov

2 Replies 2

Hello Petr,

I have searched for some command that disallows users with a preconfigured static IP address to log on, but could not find any...

A workaround may be to configure the ppp clients to get their IP address from a DHCP server:

peer default ip address dhcp

I have not tested this, so I do not know what happens when a client with a static address connects..

Check this document for the configuration of this workaround:

ASYNCHRONOUS/MODEM TECHNOLOGY

Using the Cisco IOS DHCP Server on Access Servers

http://www.cisco.com/en/US/partner/tech/tk801/tk36/technologies_configuration_example09186a0080094a4e.shtml

HTH,

Georg

makchitale
Level 6
Level 6

c3745(config-if)#ppp ipcp address ?

accept <= Accept any non zero IP address from our peer

request <= Request any address from our peer

required <= Disconnect peers with no IP address negotiated

unique <= Disconnect if peer IP address already in use

use the "required" option.

Thanks, Mak