ISDN Router Virtual Dialer

[timeman007]

Hi Guys
Wonder if anyone has figured out a way to create a "virtual dialer" for isdn router working similar to pppoe connection then client can "dial up" and disconnect when he is done , therefore stop HIGH telephone bills ?

If any know about such a program please let me know

Thanks

TimeMan
timeman@webmail.co.za

 

[BobW333]

Time Man,

What type of router?

We use Cisco 803's with a local network connected and by use of access lists stop the router connecting for anything except email, web, ftp etc. traffic.

this means that Outlook has to be configured as a Dialup and the users need to press F5 to send/receive mail but thats OK as the connection time is about 1/2 hour per day. (unless they'r surfing the web looking for holidays!)

If you want I can post a sample of the config.

Bob

 

[timeman007]

The One router is a smc ISDN TA and the other DUXBURY ISDN TA . Was very nice to only find out after these were installed that the back up service for both these products sucked and only after endless searching realized the clients should have gone for something else like cisco but in south africa the cisco is very expensive ....damn i so wish we had another telkoms company here that could break the monopoly and give us adsl freely available or satelite ,
looks like i'm still stuck thanks for replying bob is you need more info about routers please let me know maybe with some change i can use what you've done with cisco router
Thanks anyhow
Time_Man007

 

[MaxPipeline]

I'd consider an ISDN router instead of an ISDN TA. The difference is the TA is more like a modem in which your PC is still the PPP client whereas the router can act as the PPP client on behalf of your entire private network. The advantage is that the router can maintain your connection or dial on demand. Also with most ISDN routers you can configure to dial out only for specific applications or prevent dialouts for unwanted protocols.

Examples are the Cisco 803 as mentioned above. But I have had extensive experience with Lucent Pipelines and believe they are fantastic for your application. If price is an issue look on Ebay. They regularly have tons for cheap. The money you'd save from ISDN usage may make it worth your while.

 

[BobW333]

Time Man

Please excuse my ignorance but what voltage is your mains supply out there?

Reason for asking is that there are any number of Cisco and Shiva ISDN routers available 2nd hand at good prices and this may be worth while.

Can you post a direct email addr and I'll send you details

Bob

 

[sconway224]

Hello Bob:

I am interested to know more about the set up you had for the Cisco 803s with Outlook / pcs set up to dial up. We have couple of Cisco 801s installed at remote locations, set to dial up to our LAN via satellite through single 64K ISDN channel, client pcs are set up as though on a LAN, problems we are having, Outlook users when they click 'Send/Receive', Outlook is timing out before ISDN router comes back with replies.

Any details about your 803 set up , would be helpful.

Thanks,

SC

 

[BobW333]

SC,

Here's the config. Does other network traffic work over the sat link?


!
clock timezone gmt 0
clock summer-time bst recurring last Sun Mar 2:00 last Sun Oct 2:00
!
ip subnet-zero
!
no ip domain-lookup
isdn switch-type basic-net3
!
!
process-max-time 200
!
interface Ethernet0
ip address x.x.x.x 255.255.255.240
no ip directed-broadcast
!
interface BRI0
bandwidth 64
ip address y.y.y.y 255.255.255.252
no ip directed-broadcast
encapsulation ppp
dialer map ip x.x.x.x name HEDQ_41 ------------
dialer hold-queue 100
dialer load-threshold 180 either
dialer-group 1
isdn switch-type basic-net3
isdn send-alerting
ppp authentication chap
ppp multilink
!
no ip http server
ip classless
ip route 0.0.0.0 0.0.0.0 y.y.y.y
!
access-list 101 permit udp any host a.a.a.a eq ntp time-range REBOOT_FIX
access-list 101 permit tcp any host b.b.b.b time-range Access_Window
access-list 101 permit tcp any host c.c.c.c time-range Access_Window
access-list 101 permit tcp any any eq

http://www time-range

Access_Window
access-list 101 permit tcp any any eq ftp time-range Access_Window
access-list 101 permit tcp any any eq ftp-data time-range Access_Window
access-list 101 permit tcp any any eq telnet time-range Access_Window
access-list 101 permit tcp any eq ftp any time-range Access_Window
access-list 101 permit tcp any eq ftp-data any time-range Access_Window
access-list 101 permit tcp any eq telnet any time-range Access_Window
access-list 101 permit icmp any any echo time-range Access_Window
access-list 101 permit icmp any any echo-reply time-range Access_Window
access-list 101 deny ip any any
dialer-list 1 protocol ip list 101
snmp-server engineID local xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
!
line con 0
exec-timeout 2 0
password 7 xxxxxxxxxxx
login
transport input none
stopbits 1
line vty 0 4
exec-timeout 2 0
password 7 xxxxxxxxxxxx
login
!
sntp server a.a.a.a
time-range Access_Window
periodic daily 8:00 to 20:00
!
time-range REBOOT_FIX
absolute start 00:00 01 March 1993 end 00:30 01 March 1993
!
Bob

 

[sconway224]

Hello Bob:

Yes, other traffic works, even email works, if you somehow trigger the connection first (we are using small bat file, that pings the mail server, after a reply is shown the users send/receive.). I am also interested, how is set up on a pc on remote LAN ? They are set as a dial-up connection? OR LAN connection ?

Thanks,

Steve

 

[BobW333]

Steve,

What operating system are you running on your PC's?

When you configure Outlook, you set up the source for the mail. This is a "name" not an IP address and the Pc needs to resolve this to an IP address.
If you edit the LM host file with the appropriate info (see below) and use this as a local "DNS" this should bring the line up providing the a.a.a or b.b.b. address es are correct.

I'll post the LM host sample in a moment or 2.

 

[sconway224]

Good day Bob:

Windows 2000. So we need to set in hosts file, ex:

mail1 a.b.c.d

where a.b.c.d is ip address of router ? or of our DNS server here?

Also in configuration of Outlook, we would 'connect using..Local Area Network' ?

Thanks,

Steve

 

[BobW333]

Steve,

Lmhost file should look like:

a.a.a.a exchange-server #PRE

The #pre causes this to me loaded to memory when the PC is restarted...... ("PRE" MUST be in caps!)

The IP address should be the address of your mail server and the name "exchange-server" is what you configure when you set up the mail client.

The client should use connect using LAN but the option box, Connect, Work Off Line or Cancel should be enabled.

Users then work "off Line" untill they want to send/receive then they press F5 (we use Outlook 97).

Hope this is of help

Bob

 

[BobW333]

Sorry,

Should have given the IP address as b.b.b.b and this IP address should be entered in the router in the access-list.

The reason behind this is that the access-list stops windows traffic from holding the line up.

Bob