Ip_local_reserved_ports - How do i verify that kernel does not allow these ports to others services
Hi Team,
I am using RHEL 7.3.
I had added few port numbers in
Now how do I verify that kernel does not allow to a service which requests random ports for its services.
When I scan my linux box for open ports, i have several of them, but they shouldn't be open. I removed the lines for them in /etc/services, and left just stuff like telnet, ssh, ftp. Why are they still open? I've restarted the network, and I've even restarted my box, but they still apear as open.... (4 Replies)
hello all,
in order for me to close ports and remove services that could be a danger to my system i have edited the /etc/initd.conf file, /etc/system file, and renamed some of the r commands. However i wanted to know if anyone knows how to turn off all services and close ALL known ports, so i... (3 Replies)
Hi All,
Is there a max number of slabs that can be used per kernel module? I'm having a tough time finding out that kind of information, but the array 'node_zonelists' (mmzone.h) has a size of 5. I just want to avoid buffer overruns and other bad stuff.
Cheers,
Brendan (4 Replies)
supermicro(dual core) server getting rebooted after "decompressing the kernel;booting the kernel" message comes.
I tried giving acpi=off to the kernel command line but same problem.It shows everything ok and no problem with memory and processors and power supplies.Wt could be the reason?
It has... (1 Reply)
Hi gurus
Could anybody tell me which file is read by kernel to set its default system kernal parameters values in solaris. Here I am not taking about /etc/system file which is used to load kernal modules or to change any default system kernal parameter value
Is it /dev/kmem file or something... (1 Reply)
just a quick question:
a. whats the simplest command to check open port and the corresponding services?
example:
bash-2.05# netstat -an | grep LISTEN
*.199 *.* 0 0 49152 0 LISTEN
*.8989 *.* 0 0 49152 ... (1 Reply)
I had a doubt if any services need to be restarted if port no in /etc/services in an RHEL setup is changed. For eg, the port no of 443 for SSL may need to be changed.
I hope my query is clear whether any services need to be restarted if port no in /etc/services is changed.
Please revert with... (10 Replies)
Hi,
I just started working on a script. After my research, i found a command which can help me:
AIM: To build a script which starts the services (Services 1) on server 1 automatically whenever its down. And it has a dependency on other service (Service 2) on Server 2.
So my script has to... (4 Replies)
Hi everyone,
I am trying to prevent the ehci_hcd kernel module to load at boot time.
Here's what I've tried so far:
1) Add the following line to /etc/modprobe.d/blacklist.conf (as suggested here):
2) Blacklisted the module by adding the following string to
3) Tried to blacklist the module... (0 Replies)
Discussion started by: gacanepa
0 Replies
LEARN ABOUT CENTOS
semanage-port
semanage-port(8)semanage-port(8)NAME
semanage port- SELinux Policy Management port mapping tool
SYNOPSIS
semanage port [-h] [-n] [-N] [-s STORE] [ --add -t TYPE -p PROTOCOL -r RANGE port_name | port_range | --delete -p PROTOCOL port_name |
port_range | --deleteall | --extract | --list [-C] | --modify -t TYPE -p PROTOCOL -r RANGE port_name | port_range ]
DESCRIPTION
semanage is used to configure certain elements of SELinux policy without requiring modification to or recompilation from policy sources.
semanage port controls the port number to port type defitions.
OPTIONS -h, --help
show this help message and exit
-n, --noheading
Do not print heading when listing the specified object type
-N, --noreload
Do not reload policy after commit
-S STORE, --store STORE
Select an alternate SELinux Policy Store to manage
-C, --locallist
List local customizations
-a, --add
Add a record of the specified object type
-d, --delete
Delete a record of the specified object type
-m, --modify
Modify a record of the specified object type
-l, --list
List records of the specified object type
-E, --extract
Extract customizable commands, for use within a transaction
-D, --deleteall
Remove all local customizations
-t TYPE, --type TYPE
SELinux type for the object
-r RANGE, --range RANGE
MLS/MCS Security Range (MLS/MCS Systems only) SELinux Range for SELinux login mapping defaults to the SELinux user record range.
SELinux Range for SELinux user defaults to s0.
-p PROTO, --proto PROTO
Protocol for the specified port (tcp|udp) or internet protocol version for the specified node (ipv4|ipv6).
EXAMPLE
List all port defitions
# semanage port -l
Allow Apache to listen on tcp port 81
# semanage port -a -t http_port_t -p tcp 81
Allow sshd to listen on tcp port 8991
# semanage port -a -t ssh_port_t -p tcp 8991
SEE ALSO
selinux (8), semanage (8)
AUTHOR
This man page was written by Daniel Walsh <dwalsh@redhat.com>
20130617 semanage-port(8)