My phone is plugged in the port 53 of our pabx, will I have to plug my phone in another port if I implement this access list ?
> DNS is using port 53, I think you should consider > unblockthis port if you want your DNS to communicate with your ISP > DNS. > > will this access list modification prevent my internal DNS server from > updates to it self from my telco's DNS server? > > access-list 101 deny 53 any any > access-list 101 deny 55 any any > access-list 101 deny 77 any any > access-list 101 deny 103 any any > !--- insert any other previously applied ACL entries here > !--- you must permit other protocols through to allow normal > !--- traffic -- previously defined permit lists will work > !--- or you may use the permit ip any any shown here > access-list 101 permit ip any any > --------------------------------------------------------------------------- ----------------------------------------------------------------------------
