Dear all,

We have a site-to-site VPN community. Central Device is Resilience NE20, 
Satalite devices are Nokia IP30/IP40. Central VPN gateway installed Checkpoint 
NGX R60 with HFA05, SmartCenter version is NGX R65. 

>From last week, one remote site using IP40 got into trouble, the VPN 
>connection up and down several time a day.

Here is what I have done for troubleshooting:
1. The internet of remote site is PPPoE, physical line is fiber, ISP has 
confirmed that the line is OK.
2. When the VPN connection is down, I can still saw packets arrived at central 
gateway via SmartView Tracker.
3. I have compared the configuration between problem device and others, the 
configuration seemed OK.
4. I have detached the problem edge object from the community in 
SmartDashboard, and deleted the edge object. Then I recreated it and added it 
to the community. After several hours, the VPN connection up-and-down continued.
5. I have checked the VPN tunnel via checkpoint cli on central VPN gateway. I 
found that there're much more entry under IKE sa and IPsec sa for problem site 
than other normal sites. I have attached 3 text files, one is VPN tunnels 
information of problem site, other two files are information of normal sites.

The problem has lasted over 1 week, I really need your help to identify the 
cause and resolve it.

best regards
yabin yang

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++     information of problem site
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
************************* on remote VPN device IP40 *************************
NokiaIP40:39> show vpn tunnels
site        src              dst              encryption           duration     
username     status      

Enterprise  59.61.107.181    218.78.209.65    AES-256/SHA1         0:00:56:48   
N/A          ok          
src start        src end          dst start        dst end          encryption  
         duration    

59.61.107.181    59.61.107.181    134.127.0.0      134.127.255.255  AES-128/MD5 
         0:00:35:38  
59.61.107.181    59.61.107.181    134.132.0.0      134.132.255.255  AES-128/MD5 
         0:00:46:14  
134.153.19.0     134.153.19.255   218.78.209.65    218.78.209.65    AES-128/MD5 
         0:00:56:47  
59.61.107.181    59.61.107.181    218.78.209.65    218.78.209.65    AES-128/MD5 
         0:00:56:42  
134.153.19.0     134.153.19.255   134.132.0.0      134.132.255.255  AES-128/MD5 
         0:00:56:47  
134.153.19.0     134.153.19.255   134.127.0.0      134.127.255.255  AES-128/MD5 
         0:00:56:48  
134.153.19.0     134.153.19.255   134.124.0.0      134.125.255.255  AES-128/MD5 
         0:00:55:54  
134.153.19.0     134.153.19.255   134.122.0.0      134.123.255.255  AES-128/MD5 
         0:00:56:41  
NokiaIP40:40> 
************************* on central VPN device NE20 *************************
VPN shell:[/] > /tunnels/show/IKE/peer 0.0.0.38

Peer 0.0.0.38:

        1. IKE SA <501dfd4d35d59b54,4a9aad61b9a4d690>:

        2. IKE SA <a2f6c84aebaeef41,b5e019cca89336c9>:

        3. IKE SA <2ebf19f6015512dc,2bfe2e050c95fba5>:

        4. IKE SA <a9d2ea3044de9d55,63a7acfdc926c766>:

        5. IKE SA <433bfe1aacb6cc75,7416c886824c9ca3>:

        6. IKE SA <7685ea7fc59b27bf,508bbea8b5c47cef>:

        7. IKE SA <7955a2c1b607a37f,100aad3968a266e7>:

        8. IKE SA <1db629336b386bfc,7636b8b257357f43>:

        9. IKE SA <8ade721199dfdd50,32b3c250e480aa2b>:

        10. IKE SA <80803df76204ee1c,01ef1647e5934372>:

        11. IKE SA <af2adde3001ebac1,792fccbafcc8f40b>:

        12. IKE SA <c10d544a8f70cdce,ba6ed5451fce4ecd>:

        13. IKE SA <c318192dc1bfc125,835007f010d7f80a>:

        14. IKE SA <59f353383c30584c,1f176834a8285294>:

        15. IKE SA <3a0dacf667332bb5,19befd44c1e0af5d>:

        16. IKE SA <137d31e9dcb41f84,6a450b4984bf2138>:

        17. IKE SA <aaac65b9abfa73bb,7956e27ec54b32d9>:


VPN shell:[/] > /tunnels/show/IPSEC/peer 0.0.0.38

Peer 0.0.0.38:
        INBOUND:
                1. 0xa74a7de9
                2. 0x5fe28dc2
                3. 0xb5ebbc52
                4. 0x941113a8
                5. 0xfa8b153d
                6. 0x9327a72
                7. 0xe6da70d6
        INBOUND:
                1. 0xeca8ec2a
                2. 0xc3883555
                3. 0xac06a3d0
                4. 0x5ebf4a2e
                5. 0x68e59041
                6. 0xc75bd4e2
                7. 0xd79df5de
                8. 0xe2d271fb
        INBOUND:
                1. 0x3cdc9541
                2. 0xf82230fc
                3. 0x263df9d7
                4. 0x8bf825d9
                5. 0xc55c185d
                6. 0xe6bbefef
                7. 0xe4e080ff
        OUTBOUND:
                1. 0x2c6ec23a
                2. 0x2c6ec23c
                3. 0x2c6ec23e
                4. 0x2c6ec240
                5. 0x2c6ec242
                6. 0x2c6ec244
                7. 0x2c6ec246


VPN shell:[/] > 


+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++     information of working site
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
************************* on remote VPN device IP40 *************************
NokiaIP40:4> show vpn tunnels
site        src              dst              encryption           duration     
username     status      

Enterprise  218.16.240.210   218.78.209.65    AES-256/SHA1         0:07:18:10   
N/A          ok          
src start        src end          dst start        dst end          encryption  
         duration    

134.142.19.0     134.142.19.255   218.78.209.65    218.78.209.65    AES-128/MD5 
         0:00:27:42  
218.16.240.210   218.16.240.210   134.132.0.0      134.132.255.255  AES-128/MD5 
         0:00:44:38  
134.142.19.0     134.142.19.255   134.127.0.0      134.127.255.255  AES-128/MD5 
         0:00:31:44  
134.142.19.0     134.142.19.255   134.132.0.0      134.132.255.255  AES-128/MD5 
         0:00:37:38  
218.16.240.210   218.16.240.210   218.78.209.65    218.78.209.65    AES-128/MD5 
         0:00:42:43  
134.142.19.0     134.142.19.255   134.122.0.0      134.123.255.255  AES-128/MD5 
         0:00:01:15  
134.142.19.0     134.142.19.255   134.124.0.0      134.125.255.255  AES-128/MD5 
         0:00:09:37  
NokiaIP40:5> 
************************* on central VPN device NE20 *************************
VPN shell:[/] > /tunnels/show/IKE/peer 0.0.0.23

Peer 0.0.0.23:

        1. IKE SA <3ac677291d7e84ad,0149f16cd735e215>:


VPN shell:[/] > /tunnels/show/IPSEC/peer 0.0.0.23

Peer 0.0.0.23:
        INBOUND:
                1. 0xb59f12e0
                2. 0xbb77f7b0
                3. 0x177f9ede
                4. 0xf067e293
                5. 0xa939f955
                6. 0xf1d1235b
                7. 0xf790b8a8
        OUTBOUND:
                1. 0xc802a6ae
                2. 0xc802a6b0
                3. 0xc802a6b1
                4. 0xc802a6b2
                5. 0xc802a6b3
                6. 0xc802a6b4
                7. 0xc802a6b6


VPN shell:[/] > 

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++     information of another working site
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
************************* on remote VPN device IP40 *************************
NokiaIP40:36> show vpn tunnels
site        src              dst              encryption           duration     
username     status      

Enterprise  121.34.57.71     218.78.209.65    AES-256/SHA1         0:06:15:32   
N/A          ok          
src start        src end          dst start        dst end          encryption  
         duration    

121.34.57.71     121.34.57.71     134.127.0.0      134.127.255.255  AES-128/MD5 
         0:00:14:09  
134.147.19.0     134.147.19.255   218.78.209.65    218.78.209.65    AES-128/MD5 
         0:00:27:28  
121.34.57.71     121.34.57.71     134.132.0.0      134.132.255.255  AES-128/MD5 
         0:00:32:02  
121.34.57.71     121.34.57.71     218.78.209.65    218.78.209.65    AES-128/MD5 
         0:00:18:28  
134.147.19.0     134.147.19.255   134.132.0.0      134.132.255.255  AES-128/MD5 
         0:00:25:13  
134.147.19.0     134.147.19.255   134.127.0.0      134.127.255.255  AES-128/MD5 
         0:00:27:01  
134.147.19.0     134.147.19.255   134.128.0.0      134.128.255.255  AES-128/MD5 
         0:00:50:21  
134.147.19.0     134.147.19.255   134.124.0.0      134.125.255.255  AES-128/MD5 
         0:00:26:34  
134.147.19.0     134.147.19.255   134.122.0.0      134.123.255.255  AES-128/MD5 
         0:00:27:19  
NokiaIP40:37> 
************************* on central VPN device NE20 *************************
VPN shell:[/] > /tunnels/show/IKE/peer 0.0.0.25

Peer 0.0.0.25:

        1. IKE SA <3744df03d0218304,33266f199b42e50c>:


VPN shell:[/] > /tunnels/show/IPSEC/peer 0.0.0.25

Peer 0.0.0.25:
        INBOUND:
                1. 0x895bafe8
                2. 0xa786cba9
                3. 0x20ed8f5
                4. 0xe288b602
                5. 0xa81e6e00
                6. 0xcd95a38a
                7. 0x9422137d
                8. 0x865dc83b
                9. 0x24639564
        OUTBOUND:
                1. 0x18985372
                2. 0x18985373
                3. 0x18985374
                4. 0x18985375
                5. 0x18985376
                6. 0x18985377
                7. 0x18985378
                8. 0x1898537a
                9. 0x1898537b


VPN shell:[/] > 

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