# ping -c 5 172.16.80.80
PING 172.16.80.80: (172.16.80.80): 56 data bytes
64 bytes from 172.16.80.80: icmp_seq=0 ttl=255 time=0 ms
64 bytes from 172.16.80.80: icmp_seq=1 ttl=255 time=0 ms
64 bytes from 172.16.80.80: icmp_seq=2 ttl=255 time=0 ms
64 bytes from 172.16.80.80: icmp_seq=3 ttl=255 time=0 ms
64 bytes from 172.16.80.80: icmp_seq=4 ttl=255 time=0 ms
--- 172.16.80.80 ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max = 0/0/0 ms
Code:
# ping -c 10 127.0.0.1
PING 127.0.0.1: (127.0.0.1): 56 data bytes
64 bytes from 127.0.0.1: icmp_seq=0 ttl=255 time=0 ms
64 bytes from 127.0.0.1: icmp_seq=1 ttl=255 time=0 ms
64 bytes from 127.0.0.1: icmp_seq=2 ttl=255 time=0 ms
64 bytes from 127.0.0.1: icmp_seq=3 ttl=255 time=0 ms
64 bytes from 127.0.0.1: icmp_seq=4 ttl=255 time=0 ms
64 bytes from 127.0.0.1: icmp_seq=5 ttl=255 time=0 ms
64 bytes from 127.0.0.1: icmp_seq=6 ttl=255 time=0 ms
64 bytes from 127.0.0.1: icmp_seq=7 ttl=255 time=0 ms
64 bytes from 127.0.0.1: icmp_seq=8 ttl=255 time=0 ms
64 bytes from 127.0.0.1: icmp_seq=9 ttl=255 time=0 ms
--- 127.0.0.1 ping statistics ---
10 packets transmitted, 10 packets received, 0% packet loss
round-trip min/avg/max = 0/0/0 ms
#
Code:
# ping -c 5 172.16.80.85
PING 172.16.80.85: (172.16.80.85): 56 data bytes
64 bytes from 172.16.80.85: icmp_seq=0 ttl=128 time=0 ms
64 bytes from 172.16.80.85: icmp_seq=1 ttl=128 time=0 ms
64 bytes from 172.16.80.85: icmp_seq=2 ttl=128 time=0 ms
64 bytes from 172.16.80.85: icmp_seq=3 ttl=128 time=0 ms
64 bytes from 172.16.80.85: icmp_seq=4 ttl=128 time=0 ms
--- 172.16.80.85 ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max = 0/0/0 ms
#
--- Post updated at 02:01 PM ---
Can you tell me how to open port 20? Do i need to modify anything in the /etc/services file ?
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Quote:
Originally Posted by Bruno2020
Can you tell me how to open port 20? Do i need to modify anything in the /etc/services file ?
Bruno,
You do not need to worry about port 20 (yet). That line of thinking is leading you off track (sorry Rudi) because you need to establish you have a working route (network connection) between your private IP address space and the Internet. What you are describing (so far) is just a simple network configuration issue.
You cannot ping your ftp host. ping does not use ports. The ping protocol works at the transport layer.
Quote:
There is no TCP or UDP port number associated with ICMP packets as these numbers are associated with the transport layer above.
So, if you cannot ping, you can do nothing (unless ping is blocked by a firewall rule, but then you have other problems, and you are not ready for that yet) .... on any of the ports from 1 to over 65,000 (65,535 TCP and 65,535 UDP ports, to be exact), open or not, LOL. You can open port 20 as wide as a truck and you will still not be able to connect to it; because you have described basic networking issues. You cannot ping at the transport layer (yet).
Since you can ping your own interface (that is good news, at least) , you need to try to ping the next hop on your network (normally your router, but you have not provided a diagram. Please upload a sketch as I mentioned, using the attachment feature of the site, not an external img hosting link).
Do you know what the IP address of your router is?
Also, can you run the arp command on your computer?
Try:
Code:
$ arp -a
That is the next step.... you need to see if you can or cannot connect (ping) the next hop in your network.
You are getting "ahead of yourself" if you try to work / troubleshoot at the TCP or UDP layer before you make sure you are good to go lower in the stack (at the transport layer).
That is why we need to establish you can ping first.
Understand yet? To troubleshoot networking issues, it is best to start at the bottom and work your way up the protocol stack (not the other way around). If you learn to troubleshoot like this, you will find it much easier and much faster to solve problems, I promise.
I'm afraid i don't have much idea regarding the device as i did not get any sort of handover in terms of the company's network architecture . I'm told that the router in question is the SAP router for people in different locations to access the system.
i tried to telnet into the router.
Code:
telnet 172.16.80.100
Code:
-----------------------------------------------------------------------
Cisco Configuration Professional (Cisco CP) is installed on this device.
This feature requires the one-time use of the username "cisco" with the
password "cisco". These default credentials have a privilege level of 15.
YOU MUST USE CISCO CP or the CISCO IOS CLI TO CHANGE THESE PUBLICLY-KNOWN
CREDENTIALS
Here are the Cisco IOS commands.
username <myuser> privilege 15 secret 0 <mypassword>
no username cisco
Replace <myuser> and <mypassword> with the username and password you want
to use.
IF YOU DO NOT CHANGE THE PUBLICLY-KNOWN CREDENTIALS, YOU WILL NOT BE ABLE
TO LOG INTO THE DEVICE AGAIN AFTER YOU HAVE LOGGED OFF.
For more information about Cisco CP please follow the instructions in the
QUICK START GUIDE for your router or go to http://www.cisco.com/go/ciscocp
-----------------------------------------------------------------------
User Access Verification
Password:
% Password expiration warning.
-----------------------------------------------------------------------
Cisco Configuration Professional (Cisco CP) is installed on this device
and it provides the default username "cisco" for one-time use. If you have
already used the username "cisco" to login to the router and your IOS image
supports the "one-time" user option, then this username has already expired.
You will not be able to login to the router with this username after you exit
this session.
It is strongly suggested that you create a new username with a privilege level
of 15 using the following command.
username <myuser> privilege 15 secret 0 <mypassword>
Replace <myuser> and <mypassword> with the username and password you want to
use.
-----------------------------------------------------------------------
Linc-HO>ipconfig
Translating "ipconfig"...domain server (255.255.255.255) [OK]
Trying ipconfig.yourdomain.com (54.221.207.100)...
% Destination unreachable; gateway or host down
Linc-HO>
Linc-HO>show version
Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9_NPE-M), Version 15.1(1)T1, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Mon 19-Jul-10 02:53 by prod_rel_team
ROM: System Bootstrap, Version 15.0(1r)M9, RELEASE SOFTWARE (fc1)
Linc-HO uptime is 2 weeks, 4 days, 6 hours, 50 minutes
System returned to ROM by power-on
System image file is "flash0:c2900-universalk9_npe-mz.SPA.151-1.T1.bin"
Last reload type: Normal Reload
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
export@cisco.com.
Cisco CISCO2911/K9 (revision 1.0) with 2580479K/40960K bytes of memory.
Processor board ID FHK1443F0BY
3 Gigabit Ethernet interfaces
4 Serial(sync/async) interfaces
DRAM configuration is 64 bits wide with parity enabled.
255K bytes of non-volatile configuration memory.
254464K bytes of ATA System CompactFlash 0 (Read/Write)
License Info:
License UDI:
-------------------------------------------------
Device# PID SN
-------------------------------------------------
*0 CISCO2911/K9 FHK1443F0BY
Technology Package License Information for Module:'c2900'
----------------------------------------------------------------
Technology Technology-package Technology-package
Current Type Next reboot
-----------------------------------------------------------------
ipbase ipbasek9 Permanent ipbasek9
security None None None
uc None None None
data None None None
Configuration register is 0x2102
Code:
Linc-HO>show access-lists
Linc-HO>show ip interfaces brief
^
% Invalid input detected at '^' marker.
Linc-HO>show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, + - replicated route
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
C 10.10.10.20/30 is directly connected, Serial0/1/1
L 10.10.10.21/32 is directly connected, Serial0/1/1
C 10.10.10.22/32 is directly connected, Serial0/1/1
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.16.0.0/16 is directly connected, GigabitEthernet0/1
L 172.16.80.100/32 is directly connected, GigabitEthernet0/1
172.17.0.0/24 is subnetted, 1 subnets
S 172.17.80.0 [200/0] via 192.168.198.1
S 172.18.0.0/16 [1/0] via 192.168.198.1
172.19.0.0/24 is subnetted, 1 subnets
S 172.19.80.0 [1/0] via 10.10.10.22
172.20.0.0/24 is subnetted, 1 subnets
S 172.20.80.0 [200/0] via 192.168.198.1
192.168.198.0/24 is variably subnetted, 3 subnets, 3 masks
S 192.168.198.0/24 [1/0] via 192.168.198.1
C 192.168.198.0/30 is directly connected, GigabitEthernet0/0
L 192.168.198.2/32 is directly connected, GigabitEthernet0/0
Linc-HO>
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