[c-nsp] Problem with ADSL and ports tcp 445 & tcp 135

[Ryan O'Connell]

security at cytanet.com.cy wrote:

>I have adsl users that connects to the INTERNET via cisco7400  routers. On the C7400 I have ATM links that connect to the BAS (Broadband Access Servers). On the ATM interface of the C7400 I have an access-list that denies some ports. Among the ports that we are denying are the tcp 445 and tcp 135. Some customers have routers installed at their premises and they connect these routers to the adsl router of the provider. The strange thing is that some of the customers that have routers at their sides cannot see  local webpages (Web pages that are located on our network as we are their local ISP) and they cannot get e.mail. The same customers can see all other web pages and they can browse on the Internet without any problem.. 
>  
>

Try logging the deny statements to see what traffic is being dropped.

-- 
         Ryan O'Connell - CCIE #8174
<ryan at complicity.co.uk> - http://www.complicity.co.uk

I'm not losing my mind, no I'm not changing my lines,
I'm just learning new things with the passage of time