[squid-users] Squid Cache Issues migration from 5.8 to 6.6

Alex Rousskov rousskov at measurement-factory.com
Thu Jul 4 16:56:04 UTC 2024 

On 2024-07-04 12:11, Jonathan Lee wrote:
> failure while accepting a TLS connection on conn5887 local=192.168.1.1:3128
> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417

A000417 is an "unknown CA" alert sent by client to Squid while the 
client is trying to establish a TLS connection to/through Squid. The 
client does not trust the Certificate Authority that signed the 
certificate that was used for that TLS connection.

As the next step in triage, I recommend determining what that CA is in 
these cases (e.g., by capturing raw TLS packets and matching them with 
connection information from A000417 error messages in cache.log or 
%err_detail in access.log).

If you use SslBump for port 3128 traffic, then one of the possibilities 
here is that Squid is using an unknown-to-client CA to report an origin 
server that Squid itself does not trust (see signUntrusted in 
squid.conf.documented). In those cases, logging a level-1 ERROR is a 
Squid bug because that expected/desirable outcome should be treated as 
success (and a successful TLS accept treated as an error!).


HTH,

Alex.
P.S. For free Squid support, please keep the discussion on the mailing list.


> Is my main concern however I use the squid guard URL blocker
> Sent from my iPhone
> 
>> On Jul 4, 2024, at 07:41, Alex Rousskov 
>> <rousskov at measurement-factory.com> wrote:
>>
>> On 2024-07-03 13:56, Jonathan Lee wrote:
>>> Hello fellow Squid users does anyone know how to fix this issue?
>>
>> I counted about eight different "issues" in your cache.log sample. 
>> Most of them are probably independent. I recommend that you explicitly 
>> pick _one_, search mailing list archives for previous discussions 
>> about it, and then provide as many details about it as you can (e.g., 
>> what traffic causes it and/or matching access.log records).
>>
>>
>> HTH,
>>
>> Alex.
>>
>>
>>> Squid - Cache Logs
>>> Date-Time    Message
>>> 31.12.1969 16:00:00
>>> 03.07.2024 10:54:34    kick abandoning 
>>> conn7853 local=192.168.1.1:3128 remote=192.168.1.5:49710 FD 89 flags=1
>>> 31.12.1969 16:00:00
>>> 03.07.2024 10:54:29    kick abandoning 
>>> conn7844 local=192.168.1.1:3128 remote=192.168.1.5:49702 FD 81 flags=1
>>> 03.07.2024 10:54:09    ERROR: failure while accepting a TLS 
>>> connection on conn7648 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49672 FD 44 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417+TLS_IO_ERR=1
>>> 03.07.2024 10:54:09    ERROR: failure while accepting a TLS 
>>> connection on conn7647 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49670 FD 43 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417+TLS_IO_ERR=1
>>> 03.07.2024 10:54:09    ERROR: failure while accepting a TLS 
>>> connection on conn7646 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49668 FD 34 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417+TLS_IO_ERR=1
>>> 03.07.2024 10:53:04    ERROR: failure while accepting a TLS 
>>> connection on conn7367 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49627 FD 22 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417+TLS_IO_ERR=1
>>> 03.07.2024 10:52:47    ERROR: failure while accepting a TLS 
>>> connection on conn7345 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49618 FD 31 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417+TLS_IO_ERR=1
>>> 03.07.2024 10:52:38    ERROR: failure while accepting a TLS 
>>> connection on conn7340 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49616 FD 45 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000418+TLS_IO_ERR=1
>>> 03.07.2024 10:52:34    ERROR: failure while accepting a TLS 
>>> connection on conn7316 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49609 FD 45 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417+TLS_IO_ERR=1
>>> 31.12.1969 16:00:00
>>> 03.07.2024 10:51:55    WARNING: Error Pages Missing Language: en-us
>>> 31.12.1969 16:00:00
>>> 03.07.2024 10:51:55    ERROR: loading file 
>>> 9;/usr/local/etc/squid/errors/en-us/ERR_ZERO_SIZE_OBJECT': (2) No 
>>> such file or directory
>>> 03.07.2024 10:51:44    ERROR: failure while accepting a TLS 
>>> connection on conn7102 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49574 FD 34 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417+TLS_IO_ERR=1
>>> 03.07.2024 10:51:28    ERROR: failure while accepting a TLS 
>>> connection on conn7071 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49568 FD 92 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417+TLS_IO_ERR=1
>>> 03.07.2024 10:50:29    ERROR: failure while accepting a TLS 
>>> connection on conn6944 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49534 FD 101 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000418+TLS_IO_ERR=1
>>> 03.07.2024 10:49:54    ERROR: failure while accepting a TLS 
>>> connection on conn6866 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49519 FD 31 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417+TLS_IO_ERR=1
>>> 03.07.2024 10:49:38    ERROR: failure while accepting a TLS 
>>> connection on conn6809 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49503 FD 31 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417+TLS_IO_ERR=1
>>> 31.12.1969 16:00:00
>>> 03.07.2024 10:49:32    ERROR: system call failure while accepting a 
>>> TLS connection on conn6794 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49496 FD 19 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_IO_ERR=5+errno=54
>>> 03.07.2024 10:49:24    ERROR: failure while accepting a TLS 
>>> connection on conn6776 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49481 FD 137 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000418+TLS_IO_ERR=1
>>> 03.07.2024 10:48:49    ERROR: failure while accepting a TLS 
>>> connection on conn6440 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49424 FD 16 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000418+TLS_IO_ERR=1
>>> 03.07.2024 10:48:49    ERROR: failure while accepting a TLS 
>>> connection on conn6445 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49426 FD 34 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417+TLS_IO_ERR=1
>>> 03.07.2024 10:48:22    ERROR: failure while accepting a TLS 
>>> connection on conn6035 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49355 FD 226 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000418+TLS_IO_ERR=1
>>> 03.07.2024 10:48:09    ERROR: failure while accepting a TLS 
>>> connection on conn5887 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49318 FD 33 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417+TLS_IO_ERR=1
>>> 03.07.2024 10:48:09    ERROR: failure while accepting a TLS 
>>> connection on conn5875 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49312 FD 216 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417+TLS_IO_ERR=1
>>> 03.07.2024 10:48:09    ERROR: failure while accepting a TLS 
>>> connection on conn5876 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49314 FD 217 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417+TLS_IO_ERR=1
>>> 03.07.2024 10:47:57    ERROR: failure while accepting a TLS 
>>> connection on conn5815 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49297 FD 201 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000418+TLS_IO_ERR=1
>>> 03.07.2024 10:47:54    ERROR: failure while accepting a TLS 
>>> connection on conn5760 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49289 FD 195 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000418+TLS_IO_ERR=1
>>> 03.07.2024 10:47:52    ERROR: failure while accepting a TLS 
>>> connection on conn5717 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49284 FD 195 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000418+TLS_IO_ERR=1
>>> 03.07.2024 10:47:50    ERROR: failure while accepting a TLS 
>>> connection on conn5552 local=192.168.1.1:3128 
>>> remote=192.168.1.5:49268 FD 142 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000418+TLS_IO_ERR=1
>>> 31.12.1969 16:00:00
>>> 03.07.2024 10:47:34    kick abandoning 
>>> conn5254 local=192.168.1.1:3128 remote=192.168.1.5:49209 FD 100 flags=1
>>> 31.12.1969 16:00:00
>>> 03.07.2024 10:47:21    kick abandoning 
>>> conn5022 local=192.168.1.1:3128 remote=192.168.1.5:49167 FD 37 flags=1
>>> 31.12.1969 16:00:00
>>> 03.07.2024 10:47:21    kick abandoning 
>>> conn5020 local=192.168.1.1:3128 remote=192.168.1.5:49165 FD 36 flags=1
>>> 31.12.1969 16:00:00
>>> 31.12.1969 16:00:00
>>> 31.12.1969 16:00:00
>>> 31.12.1969 16:00:00
>>> 31.12.1969 16:00:00
>>> 31.12.1969 16:00:00
>>> 31.12.1969 16:00:00
>>> 31.12.1969 16:00:00
>>> 31.12.1969 16:00:00
>>> 31.12.1969 16:00:00
>>> 03.07.2024 10:42:22    WARNING: Forwarding loop detected for:
>>> 03.07.2024 10:40:08    ERROR: failure while accepting a TLS 
>>> connection on conn4955 local=192.168.1.1:3128 
>>> remote=192.168.1.5:52339 FD 98 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417+TLS_IO_ERR=1
>>> 31.12.1969 16:00:00
>>> 03.07.2024 10:39:52    kick abandoning 
>>> conn4927 local=192.168.1.1:3128 remote=192.168.1.5:52331 FD 105 flags=1
>>> 03.07.2024 10:39:09    ERROR: failure while accepting a TLS 
>>> connection on conn4846 local=192.168.1.1:3128 
>>> remote=192.168.1.5:52314 FD 19 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417+TLS_IO_ERR=1
>>> 03.07.2024 10:38:14    ERROR: failure while accepting a TLS 
>>> connection on conn4650 local=192.168.1.1:3128 
>>> remote=192.168.1.5:52274 FD 35 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000418+TLS_IO_ERR=1
>>> 03.07.2024 10:38:08    ERROR: failure while accepting a TLS 
>>> connection on conn4645 local=192.168.1.1:3128 
>>> remote=192.168.1.5:52272 FD 35 flags=1: 
>>> SQUID_TLS_ERR_ACCEPT+TLS_LIB_ERR=A000417+TLS_IO_ERR=1
>>> 03.07.2024 10:38:04    ERROR: Unsupported TLS option SINGLE_ECDH_USE
>>> 03.07.2024 10:38:04    ERROR: Unsupported TLS option SINGLE_DH_USE
>>> 31.12.1969 16:00:00
>>> 31.12.1969 16:00:00
>>> 31.12.1969 16:00:00
>>> 31.12.1969 16:00:00
>>> 31.12.1969 16:00:00
>>> _______________________________________________
>>> squid-users mailing list
>>> squid-users at lists.squid-cache.org
>>> https://lists.squid-cache.org/listinfo/squid-users
>>

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