Linux Server with PPP problem. HELP!!!!

[butchrecon]

I have a customer with a LINUX Server. I have PPP access setup and it has been working until recently. Now it ont assign an IP address. It authenticates and verifies username. Then it begins to register computer and assign an IP address. thats when it craps out on me. It wont assign an IP. Can anyone help!!! James Collins
Field Service Engineer
A+, MCP

email: butchrecon@skyenet.net

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[aixmurderer]

Sounds like it may be something went wrong with the DHCP setup on the box.

Anyone else? IBM Certified Specialist - MQSeries

 

[bgarlock]

On my ppp linux server setup, my IP addresses are assigned in the /etc/ppp/options.ttyXX file, depending on which modem the port is on. I have something like this in that file:

serverip:clientip
netmask 255.255.255.0
proxyarp

I also have the clientip in the /etc/hosts file on the server. Double check that, and check /var/log/messages

HTH.. Bruce Garlock
bruceg@tiac.net

http://bruceg.dyndns.org

 

[butchrecon]

I do not see anything in /var/log/messages concerning this. Ot worked fine up until recently. I have connected to this same system via PPP many times. James Collins
Field Service Engineer
A+, MCP

email: butchrecon@skyenet.net

Please let us (Tek-tips members) know if the solutions we provide are helpful to you. Not only do they help you but they may help others.

 

[bgarlock]

Strange that it would just stop working. What kernel/distro is this on? Is that the only problem with the machine (i.e. does the other networking functions work properly?)

Has your customer changed anything on the machine? Bruce Garlock
bruceg@tiac.net

http://bruceg.dyndns.org

 

[butchrecon]

Everything seems to be fine. Linux RH7. Network functions appear fine. The error on the windows side is
TCP/IP CP reported error 738: The server did not assighn an address.

Any clues? James Collins
Field Service Engineer
A+, MCP

email: butchrecon@skyenet.net

Please let us (Tek-tips members) know if the solutions we provide are helpful to you. Not only do they help you but they may help others.

 

[bgarlock]

Is IP forwarding enabled?

echo "1" > /proc/sys/net/ipv4/ip_forward

I remember helping you get this thing going, so if it was working correctly, then something must have changed. I've had one system setup as a dial-in ppp server run fine for over a year without being touched, so something must have changed in your configuration. Has the system been rebooted since the setup was working? Bruce Garlock
bruceg@tiac.net

http://bruceg.dyndns.org

 

[butchrecon]

IP forwarding is set up. And it has been working. All the seeting for PPP are correct. As for something changing, I feel something has. The tech who fixed a modem issue with this system a few days ago insists he changed nothing. But you are correct. Something has changed. I just cant figure out what. James Collins
Field Service Engineer
A+, MCP

email: butchrecon@skyenet.net

Please let us (Tek-tips members) know if the solutions we provide are helpful to you. Not only do they help you but they may help others.

 

[bgarlock]

It's probably best that we step through all the files associated with the setup, to see what has changed. What modem issue was the server having? Did something in /etc/mgetty+sendfax change? What does /etc/mgetty+sendmax/login.config look like? Is it calling the right script for pppd? Bruce Garlock
bruceg@tiac.net

http://bruceg.dyndns.org

 

[butchrecon]

The tech had to replace the modem its self. The /etc/mgetty+fax/login.config has not changed. ( I verified it with a customer who has a working Linux PPP server). All files look identicle between the two systems. James Collins
Field Service Engineer
A+, MCP

email: butchrecon@skyenet.net

Please let us (Tek-tips members) know if the solutions we provide are helpful to you. Not only do they help you but they may help others.

 

[bgarlock]

Does the modem allow a direct dial-in? (i.e. not using pppd) Bruce Garlock
bruceg@tiac.net

http://bruceg.dyndns.org

 

[butchrecon]

Yes. The error now is a "Error 737. Loopback was detected". This is not making any sense. We did not make any changes. We have been able to PPP in before. Now we cant. James Collins
Field Service Engineer
A+, MCP

email: butchrecon@skyenet.net

Please let us (Tek-tips members) know if the solutions we provide are helpful to you. Not only do they help you but they may help others.

 

[ifincham]

Hi,









Had a look around and the following is a suggested resolution of a D.U.N error 737 -->

http://www.modemhelp.net/dunerror/error_737.shtml

However, another one said :









"Go to the Dial-Up Networking Express connection and select the Server Tab, press the TCP\IP Setting button. Check Use default gateway on remote server, if already checked uncheck it, and try the dial-up again. "














So.. don't know what you make of that !









Regards

 

[butchrecon]

Well I am still at a stand still on this issue. I get loopback detected and nothing seems to fix it. Any more suggestions? James Collins
Field Service Engineer
A+, MCP

email: butchrecon@skyenet.net

Please let us (Tek-tips members) know if the solutions we provide are helpful to you. Not only do they help you but they may help others.

 

[bgarlock]

What does your /etc/mgetty+sendfax/mgetty.config look like. This is where the modem init commands are located, and you may want to specify E0 in there. Also what kind of modem is this? It may be that E1 is part of the modems ROM somewhere, and is not properly getting changed, or you may need to write the change to the modem.

Since the only thing that has changed in your configuration is the modem, we should probably concentrate on that.

Bruce Garlock
bruceg@tiac.net

http://bruceg.dyndns.org