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  1. avilov

    Network Redesign Help

    not knowing your specifics i would separate servers in their own vlan. also I would separate the devices that create a lot of trafic from the rest of servers and workstations in their own vlan. and finally move workstation to their own vlan or two. you have 3650 and that gives you lots of...
  2. avilov

    Cisco to 3com vlan

    did you set switchport trunk encapsulatiom dot1q on a trunk port on cisco? also I would create another vlan on booth devices instead of using vlan1
  3. avilov

    deny ports on a cisco 1700 router?

    The default port for IMAP is 143 and the default port for IMAP over SSL is 993 blocking these two ports you block most of IMAP traffic
  4. avilov

    monitor traffic on catalyst 3550

    I believe cisco provided QoS MIBs and any decent SNMP collector should be able to handle it
  5. avilov

    'F5 Networks' Remote Access

    in production we use netscreen ssl vpn boxes and everyone just loves them: admins and users. the term serv client (java or activex) is nice. It uses native windows client when possible and emulates it when it's not available. the speed is very good as long as the connection speeds on both ends...
  6. avilov

    monitor traffic on catalyst 3550

    There is a very nice tool called nTop. it runs on *nix and windows. Combined with SPAN on cisco it can provide a good result
  7. avilov

    scheduling an automatic reboot

    just schedule a job for that time and run something like C:\WINDOWS\\system32\\shutdown.exe -r -t 01. for more shutdown.exe options just type shutdown /? at command prompt
  8. avilov

    DNS Problem?

    What is "mediamarketers1"? you probably need to change it to ns1.mediamarketers.com. [alex@s ~]$ dig lhhs.org any ; <<>> DiG 9.2.4 <<>> lhhs.org any ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36803 ;; flags: qr aa ra; QUERY: 1, ANSWER: 4...
  9. avilov

    'F5 Networks' Remote Access

    If you are asking about their SSL VPN product than it's very nice and very capable. Much easier to leave with than with classical IPSEC based VPNS.
  10. avilov

    Mail Delivery host error

    That is because your MX records points to mail.your-domain.co.uk but reverse resolution of the yy.171.206.211 is server206-211.other-domain.net
  11. avilov

    Domain Move, website move

    If all you need is to move web servers and mail to a new IP block and you have some time to prepare. You can change TTL (time to leave) for the domain you move. Make it, for example, 1 hour. You need to give it some time for a change to propagate thru the internet tho. At least the half of the...
  12. avilov

    2 different internet connections for our company?

    simple but might be not very flexible aproach is to split your network to 2 VLANs with 2 different gateways for each vlan I do not know if sonic firewall is capable of load balancing between two uplinks. If it can load balance I would skip the round robin and would keep each session on the same...
  13. avilov

    Dumb IP question

    Actually, Yahoo and I think most of the other web based emails providers do include sender's IP address in the headers. It looks something like Received: from [x.x.x.x] by webyyyyy.mail.yahoo.com via HTTP;
  14. avilov

    transfer zone files

    here is a MS KB article that answers your question http://support.microsoft.com/?kbid=280061
  15. avilov

    transfer zone files

    The simple way of doing that is to create secondaries on the new box. make sure that everything is fine with the server and zones. and than convert these zones type to primary on new server and secondary on the old one. to do it quick you can use dnscmd.exe sample steps are: -dnscmd y.y.y.y...
  16. avilov

    Can't pull ip w/ intervlan routing.

    what are you trying to achve?
  17. avilov

    Looking for reccomendation on DNS Server

    If you use a zone files. the transition should be very easy regardles of platform. If you know and like windows and didn't have any major problem with it, than stick with it. if you do not like windows - use whatever you like. that's simple! :)
  18. avilov

    Prevent DHCP Lease unless Authenticated

    how the AD would know if the PC is "good" or "bad" without IP assigned? The AD uses IP to communicate and it's a requred for AD to run. You probably should be able to play with reservations and MAC filters, but I think it's road to a management nihjtmare
  19. avilov

    Switch 3900 - Cannot Ping From Other Subnet

    you need a router to communicate between two diffferent subnets. If your 3900 is not a router itself that knows how to tallk to both networks, than you need to tell it where the router thet knows how to do that is. That is done by setiing the default gateway
  20. avilov

    Understanding DHCP on multiple subnets

    If a request comes as a broadcast, than the client is on a local subnet. If it comes as an unicast with source IP from the clients subnet, than the client will be given IP from the that subnet.

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