We are a small ISP and we have a problem in one of our locations, we have a Router 2811 with 5Mb of internet and around 50 clients behind, the router in the WAN interface have a public IP and is doing NAT to the LAN interface of clients and the problem is that one or more clients PCs are sending spam to the internet and that's why the public IP of the WAN interface is too often in some DNSBLs or blacklist and some other clients when they send emails from they own domains doesn't arrive because it's say that the IP of the WAN interface is in a blacklist.
The question is, can we do something to prevent this without have to change the public IP????
Also, there are professional solutions from Cisco, such as IRONPORT, that will solve the problem for you based on the complex scores of the traffic. We use them and I have nothing but praise for them. Also, the licensing is very attractive.
The Cisco EPN system incorporates a network architecture designed to consolidate multiples services on a single Multiprotocol Label Switching (MPLS) transport network. This network is designed primarily based on Application Engineered...
Internet security is important with the increasing attacks that are happening every day. Many internet and browsing security solutions exist, but some are not very easy to use or maybe the question is how can I enable them?
Cisco Software Manager Server
This document describes the programmatic interfaces, RESTful APIs, which are supported by Cisco Software Manager Server (CSM Server).
CSM Server supports a set of finite RESTful APIs. The fir...