Unable to Telnet...............

Posted by: vatsey.sharad - Engineer, HCL Comnet
Jun 6, 2008, 2:09am PST
Hi,
I have two IP's Configured on my Cisco 2800. 1.1.1.1 - Loopback and 2.2.2.2 on Fast Ethernet. Both IP's are pingable across the WAN. And telnet to loopback IP is working fine. However I am unable to telnet to Fast Ethernet IP. The error message while trying to telnet to Fast Ethernet IP is: "Could not open connection to the host, on port 23: Connect failed". I tried to debug telnet on the router. The Debug output for unsuccessful telnet is as follows:
Telnet194: recv SB NAWS 139 24
However for a successful telnet session, the output is:
Telnet195: 1 1 251 1
TCP195: Telnet sent WILL ECHO (1)
Telnet195: 2 2 251 3
TCP195: Telnet sent WILL SUPPRESS-GA (3)
Telnet195: 80000 80000 253 24
TCP195: Telnet sent DO TTY-TYPE (24)
Telnet195: 10000000 10000000 253 31
TCP195: Telnet sent DO WINDOW-SIZE (31)
TCP195: Telnet received DO ECHO (1)
TCP195: Telnet received DO SUPPRESS-GA (3)
TCP195: Telnet received WILL TTY-TYPE (24)
Telnet195: Sent SB 24 1
TCP195: Telnet received WILL WINDOW-SIZE (31)
Telnet195: recv SB NAWS 110 52
Telnet195: recv SB 24 0 ANSI
There are no ACL's or firewalls involved in the picture.

Sharad
How many forums did you post this question in? I have already found it in 2 other forums.
HTH
Rick

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IPv4 Route Table
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 10.0.0.2 10.0.0.74 266
10.0.0.0 255.255.0.0 On-link 10.0.0.74 266
10.0.0.74 255.255.255.255 On-link 10.0.0.74 266
10.0.255.255 255.255.255.255 On-link 10.0.0.74 266
10.10.0.0 255.255.0.0 On-link 10.0.0.74 266
10.10.0.74 255.255.255.255 On-link 10.0.0.74 266
10.10.255.255 255.255.255.255 On-link 10.0.0.74 266
127.0.0.0 255.0.0.0 On-link 127.0.0.1 306
127.0.0.1 255.255.255.255 On-link 127.0.0.1 306
127.255.255.255 255.255.255.255 On-link 127.0.0.1 306
224.0.0.0 240.0.0.0 On-link 127.0.0.1 306
224.0.0.0 240.0.0.0 On-link 10.0.0.74 266
255.255.255.255 255.255.255.255 On-link 127.0.0.1 306
255.255.255.255 255.255.255.255 On-link 10.0.0.74 266
===========================================================================
Persistent Routes:
Network Address Netmask Gateway Address Metric
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IPv6 Route Table
===========================================================================
Active Routes:
If Metric Network Destination Gateway
1 306 ::1/128 On-link
1 306 ff00::/8 On-link
===========================================================================
Persistent Routes:
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Hi ,
Please check the below mentioned links
http://social.technet.microsoft.com/Forums/exchange/en-US/6cb89070-6c17-4f80-8ad1-b4bfff8c8ed6/432-the-maximum-number-of-concurrent-connections-has-exceeded-a-limit-closing-trasmission-channel
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Secure Web Mode Cipher-Option SSLv2......... Enable
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OCSP responder URL..........................
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Ethernet Broadcast Forwarding............... Disable
AP Multicast/Broadcast Mode................. Unicast
IGMP snooping............................... Disabled
IGMP timeout................................ 60 seconds
IGMP Query Interval......................... 20 seconds
MLD snooping................................ Disabled
MLD timeout................................. 60 seconds
MLD query interval.......................... 20 seconds
User Idle Timeout........................... 28800 seconds
ARP Idle Timeout............................ 300 seconds
Cisco AP Default Master..................... Enabled
--More-- or (q)uit
AP Join Priority............................ Disable
Mgmt Via Wireless Interface................. Enable
Mgmt Via Dynamic Interface.................. Enable
Bridge MAC filter Config.................... Enable
Bridge Security Mode........................ EAP
Mesh Full Sector DFS........................ Enable
AP Fallback ................................ Enable
Web Auth Redirect Ports .................... 80
Web Auth Proxy Redirect ................... Disable
Web Auth Captive-Bypass .................. Disable
Web Auth Secure Web ....................... Enable
Fast SSID Change ........................... Disabled
AP Discovery - NAT IP Only ................. Enabled
IP/MAC Addr Binding Check .................. Enabled
CCX-lite status ............................ Disable
oeap-600 dual-rlan-ports ................... Disable
oeap-600 local-network ..................... Enable

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Ahmed MALEK
My Website Link
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CSS11501 - Unable to Telnet to VRRP backup interface IP

Hi,
I have 2 units of Cisco CSS11501 which configured running on VRRP active/standby on 2 different VLAN (Circuit). When unit 1 is master unit, I am able to telnet to its circuit IP address, but unable to telnet to any circuit IP of backup unit.
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!************************** CIRCUIT **************************
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!*************************** GROUP ***************************
group ***
vip address 192.168.50.20
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!************************** CIRCUIT **************************
circuit VLAN145
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!*************************** GROUP ***************************
group ***
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Regards,
Danny Lim

Hi Marko,
That means I could not to configure redundant-interface as I have redundant-vip configured already?
Actually the topology is:
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my current config :
circuit VLAN145
ip address 172.19.145.182 255.255.255.0
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!*************************** OWNER ***************************
owner HLRLDAP
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!*************************** GROUP ***************************
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CSS1
circuit VLAN145
ip address 172.19.145.182 255.255.255.0
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ip address 192.168.50.18 255.255.255.0
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    ip critical-service 2 PING_DEFAULT_GATEWAY
CSS2
!************************** CIRCUIT **************************
circuit VLAN145
ip address 172.19.145.183 255.255.255.0
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    ip redundant-vip 1 172.19.145.184
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P * * *
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command line arg 0:     saprouter
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Hi Guys,
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Fri Feb 15 14:54:20 2008 CONNECT FROM C0, host 127.0.0.1 (loopback)
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Unable to telnet to port 25 from within or without the network.

Hi there, I have been wrestling with firewall and mail settings in Server Admin to enable mail services for a client and could use some assistance as I am new to mail administration on OS X.
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The firewall service on the network "any" has a check for Mail: SMPT for both TCP and UPD on the "Services" tab.
At this point I am just working with SMTP for outbound mail only. I have a suspicion that I am not setting the parameters for local internet domain name, and internet host name correctly; or that the settings I have are correct, but not valid.
The hostname of the server is ##-###-##-###.atgi.net, where ## correspond with the numbers in each octet of the IP address. The MX record is pointing to smtp.CLIENT'SDOMAN.com. (where CLIENTS'SDOMAIN is the actual domain for this company) (Registrar is Network Solutions, I do not have DNS enabled on this server)
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$ sudo postconf -n
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content_filter =
daemon_directory = /usr/libexec/postfix
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enableserveroptions = yes
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sample_directory = /usr/share/doc/postfix/examples
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smtpdtls_certfile = /etc/certificates/Default.crt
smtpdtls_keyfile = /etc/certificates/Default.key
smtpduse_pwserver = yes
smtpdusetls = no
unknownlocal_recipient_rejectcode = 550
virtualmailboxdomains =
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Building configuration...
Current configuration : 3351 bytes
! No configuration change since last restart
version 15.1
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
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ip domain name yourdomain.com
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speed auto
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ip address 100.241.190.125 255.255.255.240
ip tcp adjust-mss 1452
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ip http server
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ip http timeout-policy idle 60 life 86400 requests 10000
ip route 0.0.0.0 0.0.0.0 100.241.190.113
ip access-list extended KARIDGE
permit ip host 10.1.1.6 any
permit ip any host 10.1.1.6
access-list 23 permit 10.10.10.0 0.0.0.7
no cdp run
line con 0
login local
line aux 0
line vty 0 4
privilege level 15
login local
transport input telnet ssh
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Can you connect throght SSH? Which is the error message that you see?
Looking at your configuration file I don´t see the lines "enable secret" neither "enable password". If you don´t define them you can´t connect remotely to any device.

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After executing the following command: 'clear tcp tcplist', I am no longer able to telnet to the 6513 switch (CatOS). I would like to restore the telnet functionality to this switch. Does anyone have an ideas. I have searched everywhere for a resolution. Thanks.

Hello,
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Hi,
Right now, I'm to telnet that database within the machine but I've got this
fig2.jpg - 4shared.com - photo sharing - download image
Here is what I've got when telnetting the database's machine name
fig3.jpg - 4shared.com - photo sharing - download image
Here is what I've got when telnetting the primary IP of that machine
fig4.jpg - 4shared.com - photo sharing - download image
What should I do?
Best regards,
Huamin

Many thanks Atil. Good day.
It's been some days since last time! We've already resetup the machine using SUSE.
I've tried to tnsping database server name like
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TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 14-MAY-2011 15:46:50
Copyright (c) 1997, 2009, Oracle. All rights reserved.
Used parameter files:
/u01/app/oracle/product/11.2.0/db_1/network/admin/sqlnet.ora
TNS-03505: Failed to resolve name
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http://www.4shared.com/photo/SdPj4_y1/fig100.html
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orcl =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = ???.??.??.???)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
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ora-12170: TNS:connect timeout occurred
although I have done the port forward for "1521" on the router!

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"Local flow control off"
"User Access Verification
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Thanks & Regards
Ranga

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