Problem with telnet to router

i am unable to telnet to my router.whenever i telnet to it, i get a black screen without any login prompt and when i press enter in the blank screen it returns back to my cmd prompt.
i have enabled transport input telnet in my line vty 0 4.

line vty 0 4
access-class 27 in
privilege level 15
password 7 0234a1912234cd1258
login
transport input telnet
access list 27 has our specific clients ip and wildcard specified and implicit deny at end
when i did sh ip access-list 27, i got hits from the ips in access list but it connects to blank screen and then goes back to cmd while telnetting

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    2- Very important , look into release notes for a particular version. For example version 8.0, look into open CAVEATS usually at the end of the link page, reading the open bugs gives you clues what has not yet been resolved for that particular code and if in fact could impact you in your environment, it is possible that a particular bug does not realy apply to your environment becuase you have yet not implemented that particualr configuration. Usually we all try to aim towards a GD (General Deployment) code which is what we all understand is most stable but not necesarily means you have to be stack in that code waiting for another GD release, in my personal experience I have upgraded our firewall from 7.2 to 8.0(3) long ago and had no issues, and recently upgraded to 8.0(4)when it was first release in August this year.
    Release notes
    http://www.cisco.com/en/US/products/ps6120/prod_release_notes_list.html
    3- AS a good practice precaution -
    a-Backup firewall configs in clear text as well as via tftp code.
    b-Backup running code and ASDM version code currently running in firewall.
    c- Save the output of " show version " to have as reference for all the feature licenses you currently have running as asll as activation keys - good info to have to compare with after upgrade.
    d- Ensure that the code you will be using to upgrade also uses correct ASDM version code.
    I think with thorough assesment and preparation you can indeed minimize impact.
    Rgds
    Jorge

  • Problem with asa 5505 routing,nating

    i have the asa 5505 with asdm 6.4(5). my inside lan is 192.168.0.0/24. the outside of asa is connected on lan 10.13.74.0/24 and i need over lan 10.13.74.0/24 connect on lan 10.15.100.0/24. i puted nat rule on asa 5505 and acl rule and users from lan 10.15.100.0/24 can connect on my server, but i can't connect on from inside of asa connecet on lan 10.15.100.0/24 and 10.13.74.0/24. my configuration asa is
    Result of the command: "show running-config": Saved:ASA Version 8.4(2) !hostname ciscoasaenable password 8Ry2YjIyt7RRXU24 encryptedpasswd 2KFQnbNIdI.2KYOU encryptednames!interface Ethernet0/0 switchport access vlan 2!interface Ethernet0/1 switchport access vlan 3!interface Ethernet0/2!interface Ethernet0/3!interface Ethernet0/4!interface Ethernet0/5!interface Ethernet0/6!interface Ethernet0/7!interface Vlan1 nameif inside security-level 100 ip address 192.168.0.17 255.255.255.0 !interface Vlan2 nameif outside security-level 0 ip address 10.13.74.33 255.255.255.0 !ftp mode passiveobject network obj_any subnet 0.0.0.0 0.0.0.0object network server host 192.168.0.20object service ParagrafLex service tcp source eq 6190 destination eq 6190 object network sharepoint host 192.168.0.22access-list outside_access_in extended permit ip host 10.13.74.35 any access-list outside_access_in_1 extended permit ip any object server access-list outside_access_in_1 extended permit object ParagrafLex 10.15.100.0 255.255.255.0 object server access-list outside_access_in_1 extended permit object ParagrafLex any object server pager lines 24logging asdm informationalmtu inside 1500mtu outside 1500icmp unreachable rate-limit 1 burst-size 1no asdm history enablearp timeout 14400!object network obj_any nat (inside,outside) dynamic interfaceobject network server nat (any,any) static 10.13.74.34access-group outside_access_in in interface outside control-planeaccess-group outside_access_in_1 in interface outsideroute inside 0.0.0.0 0.0.0.0 10.13.74.1 1timeout xlate 3:00:00timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolutetimeout tcp-proxy-reassembly 0:01:00timeout floating-conn 0:00:00dynamic-access-policy-record DfltAccessPolicyuser-identity default-domain LOCALhttp server enablehttp 192.168.1.0 255.255.255.0 insidehttp 10.13.74.0 255.255.255.0 outsideno snmp-server locationno snmp-server contactsnmp-server enable traps snmp authentication linkup linkdown coldstart warmstarttelnet timeout 5ssh timeout 5console timeout 0dhcpd auto_config outside!threat-detection basic-threatthreat-detection statistics access-listno threat-detection statistics tcp-interceptwebvpn!class-map inspection_default match default-inspection-traffic!!policy-map type inspect dns preset_dns_map parameters  message-length maximum client auto  message-length maximum 512policy-map global_policy class inspection_default  inspect dns preset_dns_map   inspect ftp   inspect h323 h225   inspect h323 ras   inspect rsh   inspect rtsp   inspect esmtp   inspect sqlnet   inspect skinny    inspect sunrpc   inspect xdmcp   inspect sip    inspect netbios   inspect tftp   inspect ip-options !service-policy global_policy globalprompt hostname context no call-home reporting anonymousCryptochecksum:791a1fa6b6fcccaa3177fed821d1f392: end
    what i do that connect on lan 10.15.100.0/24. i cant ping my outside interface, puted rules on acl, i enabled sevice policy rule for icmp ,but nothing. pleas help me
    thanks

    my configuration asa 5505 is now
    Result of the command: "show running-config"
    : Saved
    ASA Version 8.4(2)
    hostname ciscoasa
    enable password 8Ry2YjIyt7RRXU24 encrypted
    passwd 2KFQnbNIdI.2KYOU encrypted
    names
    interface Ethernet0/0
    switchport access vlan 2
    interface Ethernet0/1
    interface Ethernet0/2
    interface Ethernet0/3
    interface Ethernet0/4
    interface Ethernet0/5
    interface Ethernet0/6
    interface Ethernet0/7
    interface Vlan1
    nameif inside
    security-level 100
    ip address 192.168.0.17 255.255.255.0
    interface Vlan2
    nameif outside
    security-level 0
    ip address 10.13.74.33 255.255.255.0
    ftp mode passive
    object network obj_any
    subnet 0.0.0.0 0.0.0.0
    object network server
    host 192.168.0.20
    object service ParagrafLex
    service tcp source eq 6190 destination eq 6190
    object network sharepoint
    host 192.168.0.22
    object network uzzpro
    range 10.13.74.40 10.13.74.45
    object network share
    host 192.168.0.22
    object-group network internalnetwork
    network-object 192.168.0.0 255.255.255.0
    object-group network uzzpro-1
    network-object object uzzpro
    access-list outside_access_in extended permit ip host 10.13.74.35 any
    access-list outside_access_in_1 extended permit ip any object server
    access-list outside_access_in_1 extended permit object ParagrafLex 10.15.100.0 255.255.255.0 object server
    access-list outside_access_in_1 extended permit object ParagrafLex any object server
    access-list outside_access_in_1 extended permit ip any object share
    access-list outside_access_in_1 extended permit icmp any object sharepoint echo-reply
    access-list inside_access_out extended permit ip any any
    pager lines 24
    logging asdm informational
    mtu inside 1500
    mtu outside 1500
    icmp unreachable rate-limit 1 burst-size 1
    no asdm history enable
    arp timeout 14400
    object network obj_any
    nat (inside,outside) dynamic interface
    object network server
    nat (inside,outside) static 10.13.74.34
    object network share
    nat (any,any) static 10.13.74.39
    access-group inside_access_out out interface inside
    access-group outside_access_in in interface outside control-plane
    access-group outside_access_in_1 in interface outside
    route inside 0.0.0.0 0.0.0.0 10.13.74.1 1
    timeout xlate 3:00:00
    timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
    timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
    timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
    timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
    timeout tcp-proxy-reassembly 0:01:00
    timeout floating-conn 0:00:00
    dynamic-access-policy-record DfltAccessPolicy
    user-identity default-domain LOCAL
    http server enable
    http 192.168.1.0 255.255.255.0 inside
    http 10.13.74.0 255.255.255.0 outside
    no snmp-server location
    no snmp-server contact
    snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart
    telnet timeout 5
    ssh timeout 5
    console timeout 0
    dhcpd auto_config outside
    threat-detection basic-threat
    threat-detection statistics access-list
    no threat-detection statistics tcp-intercept
    webvpn
    class-map inspection_default
    match default-inspection-traffic
    policy-map type inspect dns preset_dns_map
    parameters
      message-length maximum client auto
      message-length maximum 512
    policy-map global_policy
    class inspection_default
      inspect dns preset_dns_map
      inspect ftp
      inspect h323 h225
      inspect h323 ras
      inspect rsh
      inspect rtsp
      inspect esmtp
      inspect sqlnet
      inspect skinny 
      inspect sunrpc
      inspect xdmcp
      inspect sip 
      inspect netbios
      inspect tftp
      inspect ip-options
      inspect icmp
    service-policy global_policy global
    prompt hostname context
    no call-home reporting anonymous
    Cryptochecksum:cde649be1382dd8249eca185657d9de7
    : end

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