![]() Problem SolutionError Message − %PIX|ASA−4−407001: Deny traffic for local−host interface_name:inside_address,license limit of number exceeded Problem SolutionError Message − %VPN_HW−4−PACKET_ERROR: Problem SolutionError message: Command rejected: delete crypto connection between VLAN XXXX and XXXX, first. Problem SolutionError:− %PIX|ASA−4−402119: IPSEC: Received a protocol packet (SPI=spi, sequence number=seq_num) from remote_IP (username) to local_IP that failed anti−replay checking. Problem SolutionError:− %ASA−6−722036: Group client−group User xxxx IP x.x.x.x Transmitting large packet 1220(threshold 1206) Problem SolutionError: The authentication−server−group none command has been deprecated Problem SolutionError Message when QoS is Enabled in one End of the VPN Tunnel Problem SolutionWARNING: crypto map entry will be incomplete Problem SolutionError:− %ASA−4−400024: IDS:2151 Large ICMP packet from to on interface outside Solution 4Remote Access and EZVPN Users Connect to VPN but Cannot Access External Resources Problem Solutions Unable to Access the Servers in DMZ VPN Clients Unable to Resolve DNS Split−Tunnel�Unable to access Internet or excluded networks Hairpinning Local LAN Access Overlapping Private NetworksUnable to Connect More Than Three VPN Client Users Problem Solutions Configure Simultaneous Logins Configure the ASA/PIX with CLI Configure ConcentratorUnable to Initiate the Session or an Application and Slow Transfer after the Tunnel Establishment Problem Solutions Cisco IOS Router�Change the MSS Value in the Outside Interface (Tunnel End Interface) of the Router PIX/ASA 7.X�Refer to PIX/ASA DocumentationUnable to Initiate VPN Tunnel from ASA/PIX Problem SolutionUnable to Pass Traffic Across VPN Tunnel Problem SolutionConfiguring Backup peer for vpn tunnel on same crypto map Problem SolutionDisable/Restart VPN Tunnel Problem SolutionSome Tunnels not Encrypted Problem SolutionError:− %ASA−5−713904: Group = DefaultRAGroup, IP = x.x.x.x, Client is using an unsupportedTransaction Mode v2 version.Tunnel terminated. ![]() Reason 433." or "Secure VPN Connection terminated by Peer Reason 433:(Reason NotSpecified by Peer)" Problem Solution 1 Solution 2 Solution 3 IntroductionPrerequisites Requirements Components Used ConventionsIPsec VPN Configuration Does Not Work Problem Solutions Enable NAT−Traversal (#1 RA VPN Issue) Test Connectivity Properly Enable ISAKMP Enable/Disable PFS Clear Old or Existing Security Associations (Tunnels) Verify ISAKMP Lifetime Enable or Disable ISAKMP Keepalives Re−Enter or Recover Pre−Shared−Keys Mismatched Pre−shared Key Remove and Re−apply Crypto Maps Verify that sysopt Commands are Present (PIX/ASA Only) Verify the ISAKMP Identity Verify Idle/Session Timeout Verify that ACLs are Correct and Binded to Crypto Map Verify the ISAKMP Policies Verify that Routing is Correct Verify that Transform−Set is Correct Verify Crypto Map Sequence Numbers and Name and also that the Crypto map is applied in the rightinterface in which the IPsec tunnel start/end Verify the Peer IP Address is Correct Verify the Tunnel Group and Group Names Disable XAUTH for L2L Peers VPN Pool Getting Exhausted Issues with Latency for VPN Client TrafficVPN Clients are Unable to Connect with ASA/PIX Problem Solution Problem SolutionVPN Client Drops Connection Frequently on First Attempt or "Security VPN Connection terminatedby tier. Most Common L2L and Remote Access IPsec VPNTroubleshooting Solutions Reason 433." or "Secure VPN Connection terminated by Peer Reason 433:(Reason Not Specified by Peer)" Problem Solution 1 Solution 2 Solution 3 ![]() Most Common L2L and Remote Access IPsec VPN Troubleshooting Solutions Document ID: 81824 Contents Introduction Prerequisites Requirements Components Used Conventions IPsec VPN Configuration Does Not Work Problem Solutions Enable NAT-Traversal (#1 RA VPN Issue) Test Connectivity Properly Enable ISAKMP Enable/Disable PFS Clear Old or Existing Security Associations (Tunnels) Verify ISAKMP Lifetime Enable or Disable ISAKMP Keepalives Re-Enter or Recover Pre-Shared-Keys Mismatched Pre-shared Key Remove and Re-apply Crypto Maps Verify that sysopt Commands are Present (PIX/ASA Only) Verify the ISAKMP Identity Verify Idle/Session Timeout Verify that ACLs are Correct and Binded to Crypto Map Verify the ISAKMP Policies Verify that Routing is Correct Verify that Transform-Set is Correct Verify Crypto Map Sequence Numbers and Name and also that the Crypto map is applied in the right interface in which the IPsec tunnel start/end Verify the Peer IP Address is Correct Verify the Tunnel Group and Group Names Disable XAUTH for L2L Peers VPN Pool Getting Exhausted Issues with Latency for VPN Client Traffic VPN Clients are Unable to Connect with ASA/PIX Problem Solution Problem Solution VPN Client Drops Connection Frequently on First Attempt or "Security VPN Connection terminated by tier. ![]()
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