Hi , Have you tried swapping out the cable modem?   Thanks John ... View more

Hi, Try another tftp server like Tftpd64.   Thanks John ... View more

Hi,   You need to check that your access-lists allow the phone subnets to communicate. It would help if you could upload your config.   Thanks John ... View more

Hi, I am guessing the switch did not like the /~/ in your first configs.  I don't think the Cisco understands  ~ as referring to the home folder. You have to specify the full path with Cisco.   Thanks John ... View more

Hi,   You won't get the option to disable those ciphers on that switch. You can either upgrade to a newer switch or configure access lists to restrict management access to trusted hosts. The 3750 is end of life and i don't think there will be any more software fix for the switch.   Thanks John ... View more

Hi,   Yes, You could try and format the flash on the 1841 router and copy the ios back to flash. Before you format, make sure you have a backup os the ios.   Thanks John ... View more

Hi,   Does zabbix have the mibs for the new router? Can you do an snmp walk from the zabbix   Thanks John ... View more

Hi, You will need to capture traffic on the outside interface to see what is happening with the dhcp traffic. We need to see if there is traffic to and from the dhcp server. You can perform the capture form the ASA using the capture command e.g.   shutdown outside interface (shutdown gi1/1) issue command "capture fw1interface outside" enable outside interface ( no shutdown gi1/1) Use " show capture" to see how much traffic has been captured. After capture for a few minutes, stop the capture with command "capture  fw1 stop" You can look at the captured packets with command " show capture fw1 detail" You can export the capture to you laptop with command "copy  /pcap capture:fw1 tftp:" view capture on laptop using wireshark.   Thanks John   ... View more

Hi, Your switch supports weak ciphers and is vulnerable to some ssl attacks. Altering the key will not resolve the issue. You will need to upgrade the ios on the switch. What ios version are you running? What is the output of the command "show ip http server all"? If not required disable the http and https server on the switch: no ip http server and no ip http secure-server   Thanks John ... View more

Hi,   Why are you bridging the cable modem?  Can you confirm that the bridging is configured correctly?  It would be easier to first test with the modem configured  in non-bridge mode and routing configured between firewall and cable modem.   Thanks John ... View more