About lmartin80

lmartin80 · 03-13-2016

Hi, I have a Cisco router that synchronizes with four public NTP servers: ntp update-calendar ntp server 0.pool.ntp.org ntp server 1.pool.ntp.org ntp server 2.pool.ntp.org ntp server 3.pool.ntp.org The router's NTP service is accessible from the Int...

lmartin80 · 03-12-2016

Hi, I have a Cisco 891 router that is not synchronizing with NTP servers. Four NTP servers are specified in the config: Router#show running-config | include ntp ntp update-calendar ntp server 0.pool.ntp.org ntp server 1.pool.ntp.org ntp server 2.pool...

lmartin80 · 03-13-2016

Thanks

lmartin80 · 03-13-2016

Hi, I am using 0.pool.ntp.org 1.pool.ntp.org 2.pool.ntp.org and 3.pool.ntp.org as the NTP servers. The IP addresses of these servers are not fixed, they are randomly assigned depending on load and location</p>

lmartin80 · 03-13-2016

Hi, I created this access list: ip access-list extended Block-NTP deny udp any any eq ntp permit ip any any However, this access list prevents the router from synchronizing to external NTP servers: interface GigabitEthernet8 ip access-group Block-N...

lmartin80 · 03-13-2016

Hi, Should the access list be inbound or outbond?

lmartin80 · 03-13-2016

Thanks for the response Is this correct? access-list 20 permit 0.pool.ntp.orgaccess-list 20 permit 1.pool.ntp.orgaccess-list 20 permit 2.pool.ntp.orgaccess-list 20 permit 3.pool.ntp.org How do I apply this access list to the NTP service?

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