[squid-users] Requesting Help to debug my squid

[Alex Rousskov]

On 2024-06-25 02:34, Ohms, Jannis wrote:

> I run Squid 6.6  my  squid crashes  periodically I recive logs similar 
> to this  one

> 2024-06-25T08:14:05.044043+02:00 surfer-proxy squid[585630]: FATAL: 
> assertion failed: FilledChecklist.cc:263: "!rfc931[0]"

The above assertion is a Squid bug related to Ident support (RFC 931 
obsoleted by RFC 1413). There are other Ident bugs and problems in 
Squid. Our recent comprehensive fix[1] for master/v7 was superseded by 
removing Ident support itself (master/v7 commit e94ff52 [2]). Squid v6 
still has (buggy) Ident code.

If you do not really need Ident, stop using Ident features[3] in 
squid.conf and disable Ident support when building Squid:
     ./configure --disable-ident-lookups ...

If you do need Ident, consider writing an external_acl helper that 
performs Ident lookups and then disable native Ident support in Squid.


HTH,

Alex.

[1] https://github.com/squid-cache/squid/pull/1815

[2] 
https://github.com/squid-cache/squid/commit/e94ff5274ce05e6f06d7c789bb2c6452c7886584

[3] Ident features include: ident/ident_regex ACLs, %ui logformat codes, 
%IDENT external_acl_type format code, and ident_lookup_access/ident_timeout
directives.