The proposed system of my project gives everyone a better security for voice transmission.
PROPOSED SYSTEM:
As with many new technologies, VOIP introduces both security risks and opportunities. VOIP has a very different architecture than traditional circuit-based telephony, and these differences result in significant security issues.
Firewalls are a staple of security in today’s IP networks. Whether protecting a LAN or WAN, or just protecting a single computer, a firewall is usually the first line of defense against would be attackers. Firewalls work by blocking traffic deemed to be invasive, intrusive, or just plain malicious from flowing through them. Acceptable traffic is determined by a set of rules programmed into the firewall by the network administrator. The introduction of firewalls to the VOIP network complicates several aspects of VOIP, most notably dynamic port trafficking and call setup procedures.
Only particularly security-sensitive organizations bother to encrypt voice traffic over traditional telephone lines. The same cannot be said for Internet-based connections.
"A firewall is a system or group of systems that enforces an access control policy between two networks or two systems."
Firewall vendors and those crafting standards are working to make firewalls operate effectively with the widely deployed protocol and the emerging Session Initiation Protocol (SIP), many users are skirting the issue by encrypting wide-area VOIP traffic and sending it over VPN tunnels for site-to-site and remote office connections. It eliminates the risk of exposing a network to intruders, which comes with opening ports on a firewall to allow VOIP to flow through.
The potential problems with sending IP voice through a firewall break down into two categories: network address translation (NAT) and the complexity of VOIP traffic.
NAT changes the source IP address of a packet from a private address to a public one so it can be routed over the Internet. The "NAT-ing" device, such as a firewall, keeps track of what the private IP address is, so returning traffic can be routed to the sending device.A VOIP firewall is an application driven by a security policy defining whether to allow or deny certain calls. To provide superior security, the firewall must be highly reliable and add no noticeable latency to voice traffic
As with many new technologies, VOIP introduces both security risks and opportunities. VOIP has a very different architecture than traditional circuit-based telephony, and these differences result in significant security issues.
Firewalls are a staple of security in today’s IP networks. Whether protecting a LAN or WAN, or just protecting a single computer, a firewall is usually the first line of defense against would be attackers. Firewalls work by blocking traffic deemed to be invasive, intrusive, or just plain malicious from flowing through them. Acceptable traffic is determined by a set of rules programmed into the firewall by the network administrator. The introduction of firewalls to the VOIP network complicates several aspects of VOIP, most notably dynamic port trafficking and call setup procedures.
Only particularly security-sensitive organizations bother to encrypt voice traffic over traditional telephone lines. The same cannot be said for Internet-based connections.
"A firewall is a system or group of systems that enforces an access control policy between two networks or two systems."
Firewall vendors and those crafting standards are working to make firewalls operate effectively with the widely deployed protocol and the emerging Session Initiation Protocol (SIP), many users are skirting the issue by encrypting wide-area VOIP traffic and sending it over VPN tunnels for site-to-site and remote office connections. It eliminates the risk of exposing a network to intruders, which comes with opening ports on a firewall to allow VOIP to flow through.
The potential problems with sending IP voice through a firewall break down into two categories: network address translation (NAT) and the complexity of VOIP traffic.
NAT changes the source IP address of a packet from a private address to a public one so it can be routed over the Internet. The "NAT-ing" device, such as a firewall, keeps track of what the private IP address is, so returning traffic can be routed to the sending device.A VOIP firewall is an application driven by a security policy defining whether to allow or deny certain calls. To provide superior security, the firewall must be highly reliable and add no noticeable latency to voice traffic
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