I'm running on RedHat7, with apache 2.4 and redis installed. Apache won't connect to redis unless selinux issues are resolved. I know that one option to fix that is to allow all connections with:
setsebool -P httpd_can_network_connect=1
but I'd rather only allow connections to redis, which is running locally, instead of all tcp ports. I followed the suggestions in:
SElinux: allow httpd to connect to a specific port
but it didn't quite work for me. The first suggestion failed because the redis port is already defined (by redis):
semanage port -l | egrep '(^http_port_t|6379)'
http_port_t tcp 80, 81, 443, 488, 8008, 8009, 8443, 9000
redis_port_t tcp 6379, 16379, 26379
semanage port -a -t http_port_t -p tcp 6379
ValueError: Port tcp/6379 already defined
The second suggestion:
semanage port -m -t http_port_t -p tcp 6379
worked, and apache was able to connect to redis properly. Though, after a reboot, redis didn't want to start, giving me another selinux error ("SELinux is preventing /opt/rh/rh-redis32/root/usr/bin/redis-server from name_bind access on the tcp_socket port 6379"):
SELinux is preventing /opt/rh/rh-redis32/root/usr/bin/redis-server from name_bind access on the tcp_socket port 6379.
***** Plugin catchall (100. confidence) suggests
If you believe that redis-server should be allowed name_bind access on the port 6379 tcp_socket by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do allow this access for now by executing:
ausearch -c 'redis-server' --raw | audit2allow -M my-redisserver
semodule -i my-redisserver.pp
Additional Information:
Source Context system_u:system_r:redis_t:s0
Target Context system_u:object_r:http_port_t:s0
Target Objects port 6379 [ tcp_socket ]
Source redis-server
Source Path /opt/rh/rh-redis32/root/usr/bin/redis-server
Port 6379
Does anyone know how to properly allow apache to connect to (a locally installed) redis, without setting "httpd_can_network_connect"?
Note: the selinux complaint about httpd not being able to use redis, before doing any semanage commands was:
SELinux is preventing /opt/rh/httpd24/root/usr/sbin/httpd from name_connect access on the tcp_socket port 6379.
***** Plugin catchall_boolean (89.3 confidence) suggests ******************
If you want to allow httpd to can network connect
Then you must tell SELinux about this by enabling the 'httpd_can_network_connect' boolean.
Do
setsebool -P httpd_can_network_connect 1
***** Plugin catchall (11.6 confidence) suggests **************************
If you believe that httpd should be allowed name_connect access on the port 6379 tcp_socket by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'httpd' --raw | audit2allow -M my-httpd
# semodule -i my-httpd.pp
Additional Information:
Source Context system_u:system_r:httpd_t:s0
Target Context system_u:object_r:redis_port_t:s0
Target Objects port 6379 [ tcp_socket ]
Source httpd
Source Path /opt/rh/httpd24/root/usr/sbin/httpd
Port 6379
Host <Unknown>
Source RPM Packages httpd24-httpd-2.4.27-8.el7.1.x86_64
Target RPM Packages
Policy RPM selinux-policy-3.13.1-192.el7_5.6.noarch
Selinux Enabled True
Policy Type targeted
Enforcing Mode Enforcing
[...]
Raw Audit Messages
type=AVC msg=audit(1540322412.65:21558): avc: denied { name_connect } for pid=26250 comm="httpd" dest=6379 scontext=system_u:system_r:httpd_t:s0 tcontext=system_u:object_r:redis_port_t:s0 tclass=tcp_socket
type=SYSCALL msg=audit(1540322412.65:21558): arch=x86_64 syscall=connect success=no exit=EACCES a0=11 a1=7efca766b050 a2=10 a3=5bcf746c items=0 ppid=11656 pid=26250 auid=4294967295 uid=48 gid=48 euid=48 suid=48 fsuid=48 egid=48 sgid=48 fsgid=48 tty=(none) ses=4294967295 comm=httpd exe=/opt/rh/httpd24/root/usr/sbin/httpd subj=system_u:system_r:httpd_t:s0 key=(null)
Hash: httpd,httpd_t,redis_port_t,tcp_socket,name_connect
