Peers exchange key material and agree encryption and integrity methods for IPSec.Ģ. Phase II failures are generally due to a misconfigured VPN domain. Next is Phase II - the IPSec Security Associations (SAs) are negotiated, the shared secret key material used for the SA is determined and there is an additional DH exchange. In this example, the remote peer rejected the local proposal of AES/SHA1 with a lifetime of 86400 seconds and the provided Preshared key. After the first packet (the initial proposal packet), we see that the remote peer responds with No Proposal Chosen. In the example below, we see that Phase I is failing after the first packet (Main mode Phase I takes 6 packets to complete). If your encryption fails in Main Mode Packet 5, then you need to check the authentication - Certificates or pre-shared secrets Packet 6 shows that the peer has agreed to the proposal and has authorised the host initiating the key exchange. The peers IP address shows in the ID field under MM packet 5.
Packets 5 and 6 perform the authentication between the peers. The NONCE is a set of never before used random numbers sent to the other part, signed and returned to prove the parties identity. They perform key exchanges and include a large number called a NONCE. Packets 3 and 4 aren’t usually used when troubleshooting. Packet 2 ( MM Packet 2 in the trace ) is from the responder to agree on one encryption and hash algorithm If your encryption fails in Main Mode Packet 1, then you need to check your VPN proposal (encryption/hash/lifetime). Phase II packets will be labeled QM or Quick Mode.Īn arrow pointing to the left () represent IPSEC packets that the Checkpoint firewall is sending to the remote peer. Browse to the IKE.elg file.Īll Phase I packets will either be labeled Main Mode or Aggressive Mode. All phases of the connection will be logged to the IKE.elg file.Ĥ. This will create the IKE.elg file located in $FWDIR/logĢ. To use IKEVIEW for VPN troubleshooting do the following: This file parses the IKE.elg file located on the firewall.
Ikeview was originally only available to Checkpoint's CSP partners however they will gladly supply you a copy of thie file if you have a licensed Checkpoint product.
Check point vpn 1 firewall 1 windows#
It is a Windows executable that can be downloaded from. IKEVIEW is a Checkpoint Partner tool available for VPN troubleshooting purposes.
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