Podcast
Questions and Answers
Which protocol requires a session helper in a NAT environment?
Which protocol requires a session helper in a NAT environment?
- SIP (correct)
- HTTP
- SMTP
- FTP
What is the purpose of the session helper in a NAT environment?
What is the purpose of the session helper in a NAT environment?
- To create data channels
- To manually create firewall policies
- To translate IP addresses (correct)
- To block incoming TCP sessions
What does the session helper do with the source port in the TCP header?
What does the session helper do with the source port in the TCP header?
- Blocks it
- Translates it (correct)
- Opens the door for it
- Creates a pinhole for it
What does the session helper do for incoming TCP sessions with random port numbers?
What does the session helper do for incoming TCP sessions with random port numbers?
What IP address does the session helper translate the port command to in the FTP example?
What IP address does the session helper translate the port command to in the FTP example?
What is the purpose of the session helper in the SIP example?
What is the purpose of the session helper in the SIP example?
How many data channels are required for each SIP call?
How many data channels are required for each SIP call?
What IP address does the session helper translate the invite packet to in the SIP example?
What IP address does the session helper translate the invite packet to in the SIP example?
What happens after the control channel is established in the SIP example?
What happens after the control channel is established in the SIP example?
Are firewall policies needed to allow SIP traffic in the example?
Are firewall policies needed to allow SIP traffic in the example?
Which type of FTP does not work if the control channel crosses a network device doing NAT without a session helper?
Which type of FTP does not work if the control channel crosses a network device doing NAT without a session helper?
What is the IP address that the router in the example shown on the slide is doing NAT of?
What is the IP address that the router in the example shown on the slide is doing NAT of?
What is the IP address that the NAT IP-address 10.200.1.1 is translated to?
What is the IP address that the NAT IP-address 10.200.1.1 is translated to?
What happens to the IP-address in the FTP port command when it crosses the router doing NAT?
What happens to the IP-address in the FTP port command when it crosses the router doing NAT?
What happens when the server receives the FTP command with the private IP-address 10.0.1.10 as the destination for the data channel?
What happens when the server receives the FTP command with the private IP-address 10.0.1.10 as the destination for the data channel?
What does the FTP session helper do to fix the problem?
What does the FTP session helper do to fix the problem?
What device replaces the router in the example to fix the problem?
What device replaces the router in the example to fix the problem?
What does the FortiGate device do when the packet with the FTP port command arrives?
What does the FortiGate device do when the packet with the FTP port command arrives?
What is the correct order of steps for an active mode FTP connection?
What is the correct order of steps for an active mode FTP connection?
What is the likely reason that the IP address 10.0.1.10 is not routable when the server sends the SYN packet?
What is the likely reason that the IP address 10.0.1.10 is not routable when the server sends the SYN packet?
