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IPSec + L2TP + NAT-Traversal does not work for multiple clients behind same nat
PPTP VPN server: two connections from the same IP address, but different devices?Debian squeeze as L2TP/IPSec gateway for Android devicesUnderstanding ipsec with NAT and dynamic IP'sipsec vpn with racoon drops traffic on phase 1 renegotiationOpenswan + xl2tpd connections time out after a whileStrongSwan + xl2tpd client timeout between 2-5 minutesOpenSwan + AWS + Ubuntu 14.04 - Cannot reach serverTrying to replicate a working IPSec/L2TP config from OpenSWAN to StrongSWANOpenSwan and L2TPd traversing secondary gatewayIPsec VPN with subnet overlapping and NATIpsec nat-traversal on port 4500
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I have recently configured a VPN server hosted in AWS EC2.
Details: Centos 6.4, openswan, xl2tpd, NAT-traversal.
The configuration works great for a scenario when only one user connects form a given public IP address behind NAT. But when there are multiple clients behind same NAT, every new client connection drops old one. Looking at logs I can make a conclusion that l2tp treats all connections from the same nat as one.
Am I missing something? Is there a solution?
Your help is much appreciated.
centos6 ipsec openswan xl2tpd
asked May 1 '13 at 13:10
FentikFentik
262
add a comment |
I have recently configured a VPN server hosted in AWS EC2.
Details: Centos 6.4, openswan, xl2tpd, NAT-traversal.
The configuration works great for a scenario when only one user connects form a given public IP address behind NAT. But when there are multiple clients behind same NAT, every new client connection drops old one. Looking at logs I can make a conclusion that l2tp treats all connections from the same nat as one.
Am I missing something? Is there a solution?
Your help is much appreciated.
centos6 ipsec openswan xl2tpd
asked May 1 '13 at 13:10
FentikFentik
262
i think im facing the same problem did you manage to solve the problem
– john
Nov 19 '14 at 7:56
add a comment |
I have recently configured a VPN server hosted in AWS EC2.
Details: Centos 6.4, openswan, xl2tpd, NAT-traversal.
The configuration works great for a scenario when only one user connects form a given public IP address behind NAT. But when there are multiple clients behind same NAT, every new client connection drops old one. Looking at logs I can make a conclusion that l2tp treats all connections from the same nat as one.
Am I missing something? Is there a solution?
Your help is much appreciated.
centos6 ipsec openswan xl2tpd
asked May 1 '13 at 13:10
FentikFentik
262
I have recently configured a VPN server hosted in AWS EC2.
Details: Centos 6.4, openswan, xl2tpd, NAT-traversal.
The configuration works great for a scenario when only one user connects form a given public IP address behind NAT. But when there are multiple clients behind same NAT, every new client connection drops old one. Looking at logs I can make a conclusion that l2tp treats all connections from the same nat as one.
Am I missing something? Is there a solution?
Your help is much appreciated.
centos6 ipsec openswan xl2tpd
centos6 ipsec openswan xl2tpd
asked May 1 '13 at 13:10
FentikFentik
262
asked May 1 '13 at 13:10
FentikFentik
262
asked May 1 '13 at 13:10
FentikFentik
262
asked May 1 '13 at 13:10
FentikFentik
262
asked May 1 '13 at 13:10
FentikFentik
262
262
i think im facing the same problem did you manage to solve the problem
– john
Nov 19 '14 at 7:56
add a comment |
i think im facing the same problem did you manage to solve the problem
– john
Nov 19 '14 at 7:56
i think im facing the same problem did you manage to solve the problem
– john
Nov 19 '14 at 7:56
i think im facing the same problem did you manage to solve the problem
– john
Nov 19 '14 at 7:56
add a comment |
1 Answer
1
active
oldest
votes
IPSEC is very sensitive to NATted clients. You need to read about how to enable NAT traversal features on both clients and server. Out of the box it may detect only the public IP of the NATted clients and then kick out an older connection.
Second thing to check, very important in fact, you may need certificates for each client. Simple preshared key is not enough to establish identity for multiple clients, in case you use this until now.
That said, I gave up on IPSEC and moved to OpenVPN or tinc setups which use SSL and can traverse NAT more easily. The configuration of IPSEC can make you cry, even if it is still a very good encryption/authentication method.
answered Sep 30 '15 at 14:27
flohackflohack
1313
add a comment |
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1 Answer
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1 Answer
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votes
IPSEC is very sensitive to NATted clients. You need to read about how to enable NAT traversal features on both clients and server. Out of the box it may detect only the public IP of the NATted clients and then kick out an older connection.
Second thing to check, very important in fact, you may need certificates for each client. Simple preshared key is not enough to establish identity for multiple clients, in case you use this until now.
That said, I gave up on IPSEC and moved to OpenVPN or tinc setups which use SSL and can traverse NAT more easily. The configuration of IPSEC can make you cry, even if it is still a very good encryption/authentication method.
answered Sep 30 '15 at 14:27
flohackflohack
1313
add a comment |
IPSEC is very sensitive to NATted clients. You need to read about how to enable NAT traversal features on both clients and server. Out of the box it may detect only the public IP of the NATted clients and then kick out an older connection.
Second thing to check, very important in fact, you may need certificates for each client. Simple preshared key is not enough to establish identity for multiple clients, in case you use this until now.
That said, I gave up on IPSEC and moved to OpenVPN or tinc setups which use SSL and can traverse NAT more easily. The configuration of IPSEC can make you cry, even if it is still a very good encryption/authentication method.
answered Sep 30 '15 at 14:27
flohackflohack
1313
add a comment |
IPSEC is very sensitive to NATted clients. You need to read about how to enable NAT traversal features on both clients and server. Out of the box it may detect only the public IP of the NATted clients and then kick out an older connection.
Second thing to check, very important in fact, you may need certificates for each client. Simple preshared key is not enough to establish identity for multiple clients, in case you use this until now.
That said, I gave up on IPSEC and moved to OpenVPN or tinc setups which use SSL and can traverse NAT more easily. The configuration of IPSEC can make you cry, even if it is still a very good encryption/authentication method.
answered Sep 30 '15 at 14:27
flohackflohack
1313
IPSEC is very sensitive to NATted clients. You need to read about how to enable NAT traversal features on both clients and server. Out of the box it may detect only the public IP of the NATted clients and then kick out an older connection.
Second thing to check, very important in fact, you may need certificates for each client. Simple preshared key is not enough to establish identity for multiple clients, in case you use this until now.
That said, I gave up on IPSEC and moved to OpenVPN or tinc setups which use SSL and can traverse NAT more easily. The configuration of IPSEC can make you cry, even if it is still a very good encryption/authentication method.
answered Sep 30 '15 at 14:27
flohackflohack
1313
answered Sep 30 '15 at 14:27
flohackflohack
1313
answered Sep 30 '15 at 14:27
flohackflohack
1313
answered Sep 30 '15 at 14:27
flohackflohack
1313
1313
add a comment |
add a comment |
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i think im facing the same problem did you manage to solve the problem
– john
Nov 19 '14 at 7:56