I have a router Cisco 880G and recently we succeded to make it work also the 3G sim card for backup purposes.
I would like know to restrict when on 3G sim mobile usage to be able to use only the Microsoft Exchange which we have outside the company and not the ability to browse.
Any reccomendation is appreciated.
Solved! Go to Solution.
if a.b.c.d is ip address of MS exchange server
access-list 150 permit ip any host a.b.c.d
if you use tunnel interface over cellular so
tunnel source Cellular0
tunnel destination 192.168.x.x
ip access-group 150 out
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Hello and thank you for your fast reply.
I recently moved my email server to the cloud (office365) so i dont know if there is always the same IP.
i have though the following hostname for my exchange domain name
so i need to replace the IP (abcd) which you mention with the hostname?
Yesterday i have added the following to the CISCO router:
access-list 163 permit tcp any any eq smtp
access-list 163 permit tcp any any eq pop3
access-list 163 permit tcp any any eq domain
access-list 163 permit udp any any eq domain
access-list 163 deny ip any any
in order to allow only the Microsoft Exchange to be used when on 3G mobile usage but it doesnt work.
can you pls let me know your opinion