Hello Tobias, Here is the charon.log: I hope it will be useful for you.
[CFG] <apsil-10.221.128.183|25> found matching child config "apsil-10.221.128.183" with prio 6 [CFG] <apsil-10.221.128.183|25> selecting traffic selectors for other: [CFG] <apsil-10.221.128.183|25> config: 10.221.128.183/32, received: 10.221.0.0/16 => match: 10.221.128.183/32 [CFG] <apsil-10.221.128.183|25> selecting traffic selectors for us: [CFG] <apsil-10.221.128.183|25> config: 10.240.123.0/26, received: 10.240.123.0/26 => match: 10.240.123.0/26 [CFG] <apsil-10.221.128.183|25> selecting proposal: [CFG] <apsil-10.221.128.183|25> no acceptable DIFFIE_HELLMAN_GROUP found [CFG] <apsil-10.221.128.183|25> selecting proposal: [CFG] <apsil-10.221.128.183|25> no acceptable ENCRYPTION_ALGORITHM found [CFG] <apsil-10.221.128.183|25> received proposals: ESP:3DES_CBC/HMAC_SHA1_96/NO_EXT_SEQ [CFG] <apsil-10.221.128.183|25> configured proposals: ESP:3DES_CBC/HMAC_SHA1_96/MODP_1024/NO_EXT_SEQ, ESP:AES_CBC_128/AES_CBC_192/AES_CBC_256/HMAC_SHA2_256_128/HMAC_SHA2_384_192/HMAC_SHA2_512_256/HMAC_SHA1_96/AES_XCBC_96/NO_EXT_SEQ [DMN] <apsil-10.221.128.183|25> thread 15 received 11 [LIB] <apsil-10.221.128.183|25> dumping 11 stack frame addresses: [LIB] <apsil-10.221.128.183|25> /lib64/libpthread.so.0 @ 0x7f100083d000 [0x7f100084e3b0] [LIB] <apsil-10.221.128.183|25> -> ??:? [LIB] <apsil-10.221.128.183|25> /usr/local/lib/ipsec/libcharon.so.0 @ 0x7f1000d63000 [0x7f1000d86603] [LIB] <apsil-10.221.128.183|25> -> /tmp/STRONGSWAN/strongswan-5.8.3/src/libcharon/encoding/payloads/sa_payload.c:411 [LIB] <apsil-10.221.128.183|25> /usr/local/lib/ipsec/libcharon.so.0 @ 0x7f1000d63000 [0x7f1000dc6ab7] [LIB] <apsil-10.221.128.183|25> -> /tmp/STRONGSWAN/strongswan-5.8.3/src/libcharon/sa/ikev1/tasks/quick_mode.c:748 [LIB] <apsil-10.221.128.183|25> /usr/local/lib/ipsec/libcharon.so.0 @ 0x7f1000d63000 [0x7f1000dc8d1c] [LIB] <apsil-10.221.128.183|25> -> /tmp/STRONGSWAN/strongswan-5.8.3/src/libcharon/sa/ikev1/tasks/quick_mode.c:1153 [LIB] <apsil-10.221.128.183|25> /usr/local/lib/ipsec/libcharon.so.0 @ 0x7f1000d63000 [0x7f1000dbc70d] [LIB] <apsil-10.221.128.183|25> -> /tmp/STRONGSWAN/strongswan-5.8.3/src/libcharon/sa/ikev1/task_manager_v1.c:1081 [LIB] <apsil-10.221.128.183|25> /usr/local/lib/ipsec/libcharon.so.0 @ 0x7f1000d63000 [0x7f1000d94a77] [LIB] <apsil-10.221.128.183|25> -> /tmp/STRONGSWAN/strongswan-5.8.3/src/libcharon/sa/ike_sa.c:1587 [LIB] <apsil-10.221.128.183|25> /usr/local/lib/ipsec/libcharon.so.0 @ 0x7f1000d63000 [0x7f1000d8c111] [LIB] <apsil-10.221.128.183|25> -> /tmp/STRONGSWAN/strongswan-5.8.3/src/libcharon/processing/jobs/process_message_job.c:74 [LIB] <apsil-10.221.128.183|25> /usr/local/lib/ipsec/libstrongswan.so.0 @ 0x7f1000ff5000 [0x7f100102cb83] [LIB] <apsil-10.221.128.183|25> -> /tmp/STRONGSWAN/strongswan-5.8.3/src/libstrongswan/processing/processor.c:235 [LIB] <apsil-10.221.128.183|25> /usr/local/lib/ipsec/libstrongswan.so.0 @ 0x7f1000ff5000 [0x7f100103e4b7] [LIB] <apsil-10.221.128.183|25> -> /tmp/STRONGSWAN/strongswan-5.8.3/src/libstrongswan/threading/thread.c:332 (discriminator 3) [LIB] <apsil-10.221.128.183|25> /lib64/libpthread.so.0 @ 0x7f100083d000 [0x7f1000844684] [LIB] <apsil-10.221.128.183|25> -> ??:? [LIB] <apsil-10.221.128.183|25> /lib64/libc.so.6 @ 0x7f1000270000 (clone+0x6d) [0x7f1000376eed] [LIB] <apsil-10.221.128.183|25> -> ??:? [DMN] <apsil-10.221.128.183|25> killing ourself, received critical signal From: Tobias Brunner <tob...@strongswan.org> Sent: Wednesday, March 25, 2020 3:07 PM To: Marco Berizzi <pupi...@hotmail.com>; users@lists.strongswan.org <users@lists.strongswan.org> Subject: Re: [strongSwan] strongswan 5.8.3 core dump Hi Marco, > What should I do to debug it? First, not stripping symbols/debug information from binaries probably would help. Then you might already see what the problem is. Otherwise try attaching a debugger or use one to analyze the core dump (if one is created). Regards, Tobias