Hi Thor, That is correct. L2TP does not use GRE (IP Protocol 47). HTH, Tom www.isaserver.org/shinder Thomas W Shinder, M.D., MCSE, MCT -----Original Message----- From: Thor@xxxxxxxxxxxxxxx [mailto:Thor@xxxxxxxxxxxxxxx] Sent: Monday, August 27, 2001 1:39 PM To: [ISAserver.org Discussion List] Subject: [isalist] RE: Firewall and SecureNAT http://www.ISAserver.org Is GRE only used for PPTP and not L2TP? ----- Original Message ----- From: "Thomas W. Shinder" <tshinder@xxxxxxxxxxxxxxxxxx> To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx> Sent: Monday, August 27, 2001 11:29 AM Subject: [isalist] RE: Firewall and SecureNAT http://www.ISAserver.org Hi Jay, It will function as a FW client. The exception is for protocols that the FW client does not handle. I.e., non-TCP/UDP protocols. For those protocols the SecureNAT client config takes over. For example, ICMP and GRE (for outbound PPTP support). HTH, Tom www.isaserver.org/shinder Thomas W Shinder, M.D., MCSE, MCT -----Original Message----- From: Jay J. Mobley [mailto:jmobley@xxxxxxxxxx] Sent: Monday, August 27, 2001 1:22 PM To: [ISAserver.org Discussion List] Subject: [isalist] Firewall and SecureNAT http://www.ISAserver.org if a machine has the firewall client installed, but also has a default gateway of the ISA server set, does it function as a firewall client, or SecureNAT? -Jay ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: tshinder@xxxxxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: thor@xxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: tshinder@xxxxxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')