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Old 23rd March 2012
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sparky sparky is offline
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Default Point of Presence server emulation


I'm wondering if anyone has any experience in setting up a small ISP or at least a server allowing DSL based routers to dial in?

Basically what I would like to achieve is to create a Point of Presence server with the following services running on it:

PPPoE Dial-in
Free or Open RADIUS or TACACS+
I have already had a look at these links:







which give some indication on how to create a PPP dial in server. However, since I've never done this before I'd like to know if instead of using the Serial RS232c interface I would be able to use the Ethernet interface in order to create a PPPoE setup?

I plan on getting a Zyxel IES-1000 DSLAM:


Then hooking this up to one of the NICs on the server I plan to use then allowing my Cisco routers to "dial-in" using the traditional DSL PPPoE method as there will be no ATM cloud in the chain to use PPPoA.

Authentication wise I will be using CHAP of which in order to use I will need a RADIUS or TACACS+ server.

Has anyone ever done anything like this or can anyone give me any advice with anything that I've listed?

Many thanks for any response!
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Old 23rd March 2012
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sparky sparky is offline
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Also for the PPP server portion of this what's best to use: ppp userland or the pppd kernel based service?
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Old 23rd March 2012
ocicat ocicat is offline
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Originally Posted by sparky View Post
ppp userland or the pppd kernel based service?
pppd(8) may give greater performance, but its configuration many consider more tricky.
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Old 24th March 2012
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I vote for pppd also. While I've never set up a dial-in server, I do use PPP for dial-out. Some time ago (a year ... give or take) I tried the userland ppp program. It didn't always work as documented, so my sense is pppd is a better quality software. Whether it has the features, capabilities or security requirements for sparky's project I don't know.
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Old 26th March 2012
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sparky sparky is offline
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Thanks for the responses!

I kinda fudged together some config - no idea if it's gona work or not without the Zyxel DSLAM sitting infront of me:

 enable chap
 enable proxy
 set ifaddr
 set server +3000 mypass
 allow users
 set log Phase Chat LCP IPCP CCP tun command
 enable dns
 set nbns
 set device "!/usr/sbin/pppoe"
 set mtu max 1492
 set mru max 1492
 set speed sync
 disable acfcomp protocomp
 deny acfcomp
I think that is for ppp.conf though, I will need to read the man for the pppd service though and see if I can do something similar on that.
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