Showing results for 
Search instead for 
Did you mean: 
Walkthrough Wednesdays

What Linus Kernel/OS for CUCM 6.0(1)?

Hello, I'm looking to set CUCM 6.0(1) up on a box and need to know what version or kernel of Linux I need. I can't seem to find that info in the 6.0(1) release notes.

Rob Huffman
Hall of Fame Community Legend

Hi Nick,

It is a locked down version of Linux Red Hat Enterprise Edition (thanks Jaime). The install media installs this so you don't need to worry about sourcing this yourself :)

Hope this helps!


Jaime Valencia
Hall of Fame Cisco Employee

jaja, you're most welcome Rob, actually i think i got somewhere the info about which release of Linux we use for 5.x and 6.x, FYI the new 7 release contains a new linux version

if you update the case tomorrow while i'm at the office i'll get the notification of update and i can look for that since i'm home right now and don't have all the docs with me




if this helps, please rate

Actually, it's actually Red Hat Enterprise Linux 3. and its actually really easy to have an open UCM 6.x and have it all for you, first you will need to start modifiying the ks.cfg file (change root password), then blah blah blah..and while there..dont forget to modify the hw you can install it in any pc "hint" something like this




NOT, 7828I3, *, *, *, *, *

NOT, 7828H3, *, *, *, *, *

VAL, *, *, *, *, *, *

VAL, vmware, *, *, *, *, *


then..dont forget to modify the accept all type of you can access the box..however you want..ahh also...dont forget to start some have a complete linux box..


:INPUT ACCEPT [21:28495]


:OUTPUT ACCEPT [223:33580]

#Deny outside packets from internet which claim to be from our

#loopback interface.

-A INPUT -s -i eth0 -j DROP

#block gopher

-A INPUT -p tcp -m tcp --dport 70 -j DROP

-A INPUT -p udp -m udp --dport 70 -j DROP

#block finger

-A INPUT -p tcp -m tcp --dport 79 -j DROP

-A INPUT -p udp -m udp --dport 79 -j DROP

#block rtelnet

-A INPUT -p tcp -m tcp --dport 107 -j DROP

-A INPUT -p udp -m udp --dport 107 -j DROP

#block pop2

-A INPUT -p tcp -m tcp --dport 109 -j DROP

-A INPUT -p udp -m udp --dport 109 -j DROP

#block pop3

-A INPUT -p tcp -m tcp --dport 110 -j DROP

-A INPUT -p udp -m udp --dport 110 -j DROP

#block uucp-path

-A INPUT -p tcp -m tcp --dport 117 -j DROP

-A INPUT -p udp -m udp --dport 117 -j DROP

#block imap

-A INPUT -p tcp -m tcp --dport 143 -j DROP

-A INPUT -p udp -m udp --dport 143 -j DROP

#block xdmcp

-A INPUT -p tcp -m tcp --dport 177 -j DROP

-A INPUT -p udp -m udp --dport 177 -j DROP

#block nextstep

-A INPUT -p tcp -m tcp --dport 178 -j DROP

-A INPUT -p udp -m udp --dport 178 -j DROP

#block irc

-A INPUT -p tcp -m tcp --dport 194 -j DROP

-A INPUT -p udp -m udp --dport 194 -j DROP

#block imap3

-A INPUT -p tcp -m tcp --dport 220 -j DROP

-A INPUT -p udp -m udp --dport 220 -j DROP

#block fatserv

-A INPUT -p tcp -m tcp --dport 347 -j DROP

-A INPUT -p udp -m udp --dport 347 -j DROP

#block https

-A INPUT -p tcp -m tcp --dport 443 -j DROP

-A INPUT -p udp -m udp --dport 443 -j DROP

#block saft

-A INPUT -p tcp -m tcp --dport 487 -j DROP

-A INPUT -p udp -m udp --dport 487 -j DROP

#block ipp

-A INPUT -p tcp -m tcp --dport 631 -j DROP

-A INPUT -p udp -m udp --dport 631 -j DROP

#block phonebook

-A INPUT -p tcp -m tcp --dport 676 -j DROP

-A INPUT -p udp -m udp --dport 676 -j DROP

#block rsync

-A INPUT -p tcp -m tcp --dport 873 -j DROP

-A INPUT -p udp -m udp --dport 873 -j DROP

#block telnets

-A INPUT -p tcp -m tcp --dport 992 -j DROP

-A INPUT -p udp -m udp --dport 992 -j DROP

#block imaps

-A INPUT -p tcp -m tcp --dport 993 -j DROP

-A INPUT -p udp -m udp --dport 993 -j DROP

#block pop3s

-A INPUT -p tcp -m tcp --dport 995 -j DROP

-A INPUT -p udp -m udp --dport 995 -j DROP

#allow only local connections on port 514 UDP for syslog

-A INPUT -i lo -p udp -m udp --dport 514 -j ACCEPT

-A INPUT -i ! lo -p udp -m udp --dport 514 -j DROP

#block X-Windows font server

-A INPUT -p tcp -m tcp --dport 7100 -j DROP


..something like will do it..i am still trying to work with the i dont have to have a license file to play with it...all provided to you for education purposes only..and well have a true open ucm lab to play..and become a better engineer..


Jaime Valencia
Hall of Fame Cisco Employee

indeed you're right. i found my doc on that

Redhat Enterprise Linux V3, Linux Kernel 2.4



if this helps, please rate



if this helps, please rate
Content for Community-Ad

Spotlight Awards 2021