OPLE IT Blog http://www.opleit.com/blog Knowledge Shared is Knowledge Multiplied Thu, 28 Jan 2010 22:56:31 +0000 http://wordpress.org/?v=2.9.2 en hourly 1 Cisco Dialer and ATM interface setup http://www.opleit.com/blog/?p=75 http://www.opleit.com/blog/?p=75#comments Mon, 25 Jan 2010 20:24:25 +0000 -B1nh34D- http://www.opleit.com/blog/?p=75 I have put together some examples of an ATM, and Dialer interface with virtual dialer interface (as preffered by Cisco)

My device is a 2621xm + ADSL WIC. I shall post a full excerpt from the config:

alex@STUDIO17:~$ telnet 192.168.1.254

Trying 192.168.1.254…

Connected to 192.168.1.254.
Escape character is ‘^]’.
User Access Verification
Username: alex
Password:
C2621XM>en
Password:
C2621XM#sh run
interface Loopback
no ip address
!
interface ATM0/0
no ip address
no atm ilmi-keepalive
dsl operating-mode auto
pvc 0 0/38
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
!
interface FastEthernet0/0
ip address 192.168.0.254 255.255.255.0
ip virtual-reassembly
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.1.254 255.255.255.0
ip nat inside
ip virtual-reassembly
duplex auto
speed auto
!
interface Virtual-Template1
ip unnumbered Loopback0
ip virtual-reassembly
peer default ip address pool VPN
ppp encrypt mppe 128
ppp authentication ms-chap-v2
interface Dialer1
ip address negotiated
ip mtu 1432
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer pool 1
dialer-group 1
ppp authentication chap callin
ppp chap hostname YOUR ISP HOST HERE
ppp chap password YOUR HASHED PASSWORD HERE
crypto map SITEMAP
ip local pool VPN 192.168.2.1 192.168.2.254
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer1
!
Detailed explanation and configuration of each:

First we will take the physical interface at ATM0/0:
you will of cource need to configure this with the ‘conf t’ command (to configure terminal) and then enter the interface with the ‘int atm0/0′ command.  then you will be able to type out the lines nescesary:
C2621XM#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
C2621XM(config)#int atm0/0
C2621XM(config-if)#
C2621XM(config-if)#no ip address
C2621XM(config-if)#no atm ilmi-keepalive
C2621XM(config-if)#dsl operating-mode auto
We will now need to enter PVC and enter your VPI and VCI (I have used 0/38)
Next I will put in my encapsulation method under this and then follow that up by giving and entering my dialer pool, before exiting the conf
C2621XM(config-if)#pvc 0 0/38
C2621XM(config-if-atm-vc)encapsulation aal5mux ppp dialer
C2621XM(config-if-atm-vc)#dialer pool-member 1
C2621XM(config-if-atm-vc)#exit
C2621XM(config-if)#exit
C2621XM(config)#
Now that we have finished with ATM0/0, we will have a look at dialer1

C2621XM(config)#int dialer1
C2621XM(config-if)#ip address negotiated
C2621XM(config-if)#ip mtu 1432
C2621XM(config-if)#ip nat outside
C2621XM(config-if)#ip virtual-reassembly
C2621XM(config-if)#encapsulation ppp (ppp over atm)
C2621XM(config-if)#dialer pool 1
C2621XM(config-if)#dialer-group 1
C2621XM(config-if)#ppp authentication chap callin
C2621XM(config-if)#ppp chap hostname (your username here)
C2621XM(config-if)#ppp chap password (your password here)
C2621XM(config-if)#crypto map SITEMAP
C2621XM(config-if)#exit
C2621XM(config)#
I do not use my FastEthernet0/0 port, hence I have configured all traffic from my Router to a switch connected to the FastEthernet0/1 port.
C2621XM(config)#interface FastEthernet0/1
C2621XM(config-if)#ip address 192.168.1.254 255.255.255.0
C2621XM(config-if)#ip nat inside
C2621XM(config-if)#ip virtual-reassembly
C2621XM(config-if)#duplex auto
C2621XM(config-if)#speed auto
C2621XM(config-if)#exit
C2621XM(config)
I have an outside rule as follows for outgoing traffic, and a NAT binding from the dialer for the incoming traffic
C2621XM(config)#ip route 0.0.0.0 0.0.0.0 Dialer1
C2621XM(config)#ip nat inside source route-map NAT interface Dialer1 overload
Finally you can save the runtime and test your connection:
C2621XM(config)#exit
C2621XM#copy run start
Destination filename [startup-config]?
Building configuration…
[OK]
C2621XM#

Please excuse any errors or non-factual comments, I am still learning Cisco.  However I was able to use the steps above to get my internet connection going!
Please comment if you have any suggestions, or questions
EDIT! I have spent the last 3 days trying to figure out why my internet connection speed was OK on my standard Thomson ADSL Router and appeared to be capped at 2.3Mbps on my Cisco ADSL WIC. I tried all sorts, changing the method that the router negotiates with the DSLAMs at the ISP end.
Xilo broadband have been very attentive and patient with me while I logged fault calls before any of the testing

Through some extensive research and reading, it turns out that there are some additional commands that I needed to give for my ATM0/0 interface as follows:

The following is an aditional configuration of SCC clock rates on the ATM interface. Clock rates are set with the clock rate aal5 command and the clock rate aal2command.

interface ATM0/0

clock rate aal5 5300000
clock rate aal2 4000000

dsl operating-mode auto

This has helped massively and has made the connection even better than I could have expected.

Hope this helps anyone having specific problems with similar equipment
on a side note Xilo / UNO broadband for the win! its a refreshing change to have a constant and reliable internet connection and top notch support 24/7
Alex
]]> http://www.opleit.com/blog/?feed=rss2&p=75 0 Wordpress mono-lab black theme bug-fix for IE8 http://www.opleit.com/blog/?p=63 http://www.opleit.com/blog/?p=63#comments Tue, 05 Jan 2010 19:23:52 +0000 -B1nh34D- http://www.opleit.com/blog/?p=63 Read the Rest...
]]> A friend of mine runs a well established blogging site at www.d0tk0m.com. He has been experiencing some problems with some of the CSS on his site.

I decided to take a look to see if this could be rectified.  There were two initial complaints;

  1. When viewing the site in IE8 there was a huge scrollbar on the horizontal axis.
  2. When using IE8 there were problems with the Syntax Highlighter (the view source button and print buttons etc are all over the place)

After downloading the site I took a look at the main background CSS style sheet located here:

/wp-content/themes/pianoblack/style.css

I then started troubleshooting by commenting out various CSS until I found one that did the trick. I also found that it made no noticable style changes to the site:

code snippet

code snippet

Hey presto, the issue was fixed.

I have not looked into the issue with the syntax hi-lighter, but may have found the issue.  Will keep updating this post with the findings.  In the CSS for this issue, there are some author comments to show compatibility for IE8 / 7:

Comments Welcome

]]> http://www.opleit.com/blog/?feed=rss2&p=63 1 Windows 7 FAIL http://www.opleit.com/blog/?p=57 http://www.opleit.com/blog/?p=57#comments Sun, 03 Jan 2010 18:39:19 +0000 -B1nh34D- http://www.opleit.com/blog/?p=57 Genuine Windows 7 FAIL. press the back arrow? there is no back arrow!

Windows Fail

FAIL

]]> http://www.opleit.com/blog/?feed=rss2&p=57 2 Vodafone Access Gateway Sure Signal http://www.opleit.com/blog/?p=47 http://www.opleit.com/blog/?p=47#comments Sat, 02 Jan 2010 11:46:28 +0000 -B1nh34D- http://www.opleit.com/blog/?p=47 Read the Rest...
]]> Gateway

If you are unfortunate enough (like me) to live in an area where you get absolutely no phone signal on any network, enter the Vodafone Gateway.  This uses your existing broadband connection as a VOIP gateway.  however this is not without its problems.  Usually if you live in a ‘no signal’ area then you live in an area with low internet bandwidth speeds and no cable (yes I live in the dark ages).  I believe that Vodafone run their own QOS protocol from the box, however internet downloading can reduce the quality of the incoming voice signal.  and if you are uploading, you will be able to hear people fine, but they will complain that your voice is very jerky.

As I am also running a hardware firewall I struggled to see that the device should just ‘plug and work’ as stated in the gateway documentation.  Through research and a lots of calls to the helpdesk I managed to weedle from them a list of ports that the gateway needed DMZ or port forward access to.. After I had added these to my firewall runtime, up it comes all bells and whistles.  HOWEVER they still have not ironed out the HSDPA access over the gateway, as this crashes my gateway every time, requiring a hard reset of the device.

Here is a list of port forwards to IP addresses that you need to allow access to

NTP on UDP-123 to 212.183.133.181

NTP on UDP-123 to 212.183.133.182

Ping on ICMP-8 to 212.183.133.181

Ping on ICMP-8 to 212.183.133.182

ESP on IP-50 to 212.183.133.177

IPSEC NAT Traversal on UDP-4500 to 212.183.133.177

ISAKMP on UDP-500 to 212.183.133.177

Comments welcome

]]> http://www.opleit.com/blog/?feed=rss2&p=47 0 Simple function for collecting a visitors IP address http://www.opleit.com/blog/?p=45 http://www.opleit.com/blog/?p=45#comments Sat, 02 Jan 2010 09:28:19 +0000 -B1nh34D- http://www.opleit.com/blog/?p=45 Read the Rest...
]]> So that you can register it in a database with visitor details and check against white and blacklists for known spammers

Took me a while to get this one right, so here it is; really very simple

<?php

function GetIP()
{
global $ip;
$ip=$_SERVER['REMOTE_ADDR'];
}
?>

]]> http://www.opleit.com/blog/?feed=rss2&p=45 0