Solved

BOOTP htype, len,... for dial - up ISP

Posted on 2001-08-24
5
365 Views
Last Modified: 2010-10-05
Hi,
My dial-up ISP uses DHCP for my configuration.
There are a few fields that I'm not sure of how to fill for my modem.
htype - hardware type
hlen

Is it 20, serial line?

1 Ethernet (10Mb)                                    
2 Experimental Ethernet (3Mb)                        
3 Amateur Radio AX.25                                
4 Proteon ProNET Token Ring                          
5 Chaos                                              
6 IEEE 802 Networks                                  
7 ARCNET                                            
8 Hyperchannel                                      
9 Lanstar                                            
10 Autonet Short Address                            
11 LocalTalk                                        
12 LocalNet (IBM PCNet or SYTEK LocalNET)            
13 Ultra link                                        
14 SMDS                                            
15 Frame Relay                                        
16 Asynchronous Transmission Mode (ATM)              
17 HDLC                                              
18 Fibre Channel                      
19 Asynchronous Transmission Mode (ATM)      
20 Serial Line                                        
21 Asynchronous Transmission Mode (ATM)              

Thanks

0
Comment
Question by:bod_1
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
5 Comments
 
LVL 63

Expert Comment

by:SysExpert
ID: 6423849
Yes - Modem is serial line.

I hope this helps !
0
 
LVL 63

Expert Comment

by:SysExpert
ID: 6423852
Usually - Dial up uses PPP and des not require any configuration.
Are you sure he is using DHCP ??

I hope this helps !
0
 

Author Comment

by:bod_1
ID: 6425086
Thanks SysExpert,

Yup.  They have an install disk and it sets, control panel -> networking -> 'use DHCP for WINS resolution' radio button.
I didn't think that PPP had any gateway, nameserver, or address configuration stuff.  If not, wouldn't DHCP be sort of a mandatory step in configuring TCP and IP modules for dial-in servers?

Can you answer two more quick questions? I'll add points to this one;

The Bootstrap protocol states ports 67 and 68 are bootp server and client respectively. I couldn't find port numbers in the DHCP rfcs. Since DHCP is an extension of bootp, am I right to assume that these same ports are used?

and

what is WINS resolution? (I know it's got to have something to do with nameservers.)

Thanks

0
 
LVL 63

Accepted Solution

by:
SysExpert earned 100 total points
ID: 6425461
First of all, in the dial-up networking, there is an advanced option per connection,  that lets you say what the ppp Server is going to be, and the DNS etc ( ie, whether to use the ISP's PPP defaults- similar to DHCP ).

WINS is NetBIOS resolution for Microsoft machines - Netbios name to IP  etc. This should really not matter to an ISP.

here are some sites to let you know about different ports, and the common usage
                 http://www.robertgraham.com/pubs/firewall-seen.html
                 http://www.isi.edu/in-notes/iana/assignments/port-numbers
                 http://www.netice.com/advice/Exploits/Ports/ <note this site

List of TCp/IP ports ports list, port list TCP ports list                 http://www.joemagee.com/filez/port-numbers.txt 

I hope this helps !
0
 

Author Comment

by:bod_1
ID: 6426658
Thanks SysExpert,
The pages are answering a lot of questions I had.
Cheers
0

Featured Post

Free NetCrunch network monitor licenses!

Only on Experts-Exchange: Sign-up for a free-trial and we'll send you your permanent license!

Here is what you get: 30 Nodes | Unlimited Sensors | No Time Restrictions | Absolutely FREE!

Act now. This offer ends July 14, 2017.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

PRTG Network Monitor lets you monitor your bandwidth usage, so you know who is using up your bandwidth, and what they're using it for.
WARNING:   If you follow the instructions here, you will wipe out your VTP and VLAN configurations.  Make sure you have backed up your switch!!! I recently had some issues with a few low-end Cisco routers (RV325) and I opened a case with Cisco TA…
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
Monitoring a network: how to monitor network services and why? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the philosophy behind service monitoring and why a handshake validation is critical in network monitoring. Software utilized …

690 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question