I have setup a Linux machine on my server but for some reason Im unable to reach my default gateway. This is causing me to not communicate with the outside world (unable to connect to CentOS repos)
Now the default gateway here is 142.133.48.1 and it falls under my network.
But I cannot ping it.
Firewall and iptables is off. So I have no idea what else might be wrong here.
We are unable to bring one of our linux boxes into the network once it was restarted. But once we stop and start the network service. We are able to ping the gateway and get into network. After a minute or two we get the following reponse for the ping command
64 bytes from 124.168.215.40:... (6 Replies)
Hello this is my first post at this forum.
Apologize for my lack of network understanding
but Im posting to learn.
I have a problem reaching default gateway 10.18.110.1
If I use my laptop I can ping 10.18.110.1 but with our red hat multihomed server the gateway does not respond to ping.
cat... (11 Replies)
I was install new solaris10 on m4000 model after that i "ping -s" to default gateway but it's take longtime (2 Min) to reply and if i use "ping" only it's reply to fase(2 sec). any body who can tell me about my problem and how to fix it please. i'm try to fix several days. (2 Replies)
Hello,
I am new to Unix :D and have been trying to configure an AIX server running 5.3. I used smitty or smit to configure interface 0 on the server. I am able to ping the IP I set, however I am still unable to ping the gateway. I configured the IP by navigating to Communications Applications... (6 Replies)
I know the subject line is very similar to: destination host unreachable
but the problem with my machine appears to be somewhat different from that thread. apologies if I missed something from there.
We recently moved a machine physically and from one subnet to another . I used... (1 Reply)
I have NCR MP-RAS unix. I have been trying for several months to get our network working since we had never used it before. I have setup all routes that I can think of. I know it has something to do with the routing table, because out of sheer luck I was able to get it working, and than like a... (4 Replies)
I just reinstalled a fresh install of 5300 07 on an old 44p model 170, after installing I set an IP Address on en2 and I tried to the ping default gateway, no response. I tried a
startsrc -g tcpip
... and then I can ping the default gateway. I broke the ping and tried again to ping. I cannot... (1 Reply)
Hi,
Here is the issue: There are 2 identical systems in the same subnet here. They can ping and ssh each other. One can ping the default gateway and one can not with error '... icmp_seq Destination Host Unreachable'. I can't find any difference between the two systems in terms of network... (4 Replies)
Hi,
I installed AIX 7.1 on a blade though (hmc with vio). I can ping the IP address, but not the gateway. Is there anything that I should configure?
Is there anything that I have to check with vio setting or Am I missing any configuration?
Please let me know further.
Thank you (5 Replies)
Dear friends
I use RedHat 6.5, which sets the gateway in the configuration file / etc / sysconfig / network as GATEWAY = 192.168.1.26, and the gateway in the configuration file / etc / sysconfig / network-scripts / ifcfg-eth11 as GATEWAY = 192.168.1.256. The two gateways are different.... (6 Replies)
Discussion started by: tanpeng
6 Replies
LEARN ABOUT MINIX
netmasks
netmasks(4) File Formats netmasks(4)NAME
netmasks - network mask database
SYNOPSIS
/etc/inet/netmasks
/etc/netmasks
DESCRIPTION
The netmasks file contains network masks used to implement IP subnetting. It supports both standard subnetting as specified in RFC-950 and
variable length subnetting as specified in RFC-1519. When using standard subnetting there should be a single line for each network that is
subnetted in this file with the network number, any number of SPACE or TAB characters, and the network mask to use on that network. Network
numbers and masks may be specified in the conventional IP `.' (dot) notation (like IP host addresses, but with zeroes for the host part).
For example,
128.32.0.0 255.255.255.0
can be used to specify that the Class B network 128.32.0.0 should have eight bits of subnet field and eight bits of host field, in addition
to the standard sixteen bits in the network field.
When using variable length subnetting, the format is identical. However, there should be a line for each subnet with the first field being
the subnet and the second field being the netmask that applies to that subnet. The users of the database, such as ifconfig(1M), perform a
lookup to find the longest possible matching mask. It is possible to combine the RFC-950 and RFC-1519 form of subnet masks in the net-
masks file. For example,
128.32.0.0 255.255.255.0
128.32.27.0 255.255.255.240
128.32.27.16 255.255.255.240
128.32.27.32 255.255.255.240
128.32.27.48 255.255.255.240
128.32.27.64 255.255.255.240
128.32.27.80 255.255.255.240
128.32.27.96 255.255.255.240
128.32.27.112 255.255.255.240
128.32.27.128 255.255.255.240
128.32.27.144 255.255.255.240
128.32.27.160 255.255.255.240
128.32.27.176 255.255.255.240
128.32.27.192 255.255.255.240
128.32.27.208 255.255.255.240
128.32.27.224 255.255.255.240
128.32.27.240 255.255.255.240
128.32.64.0 255.255.255.192
can be used to specify different netmasks in different parts of the 128.32.0.0 Class B network number. Addresses 128.32.27.0 through
128.32.27.255 have a subnet mask with 28 bits in the combined network and subnet fields (often referred to as the subnet field) and 4 bits
in the host field. Furthermore, addresses 128.32.64.0 through 128.32.64.63 have a 26 bits in the subnet field. Finally, all other
addresses in the range 128.32.0.0 through 128.32.255.255 have a 24 bit subnet field.
Invalid entries are ignored.
SEE ALSO ifconfig(1M), inet(7P)
Postel, Jon, and Mogul, Jeff, Internet Standard Subnetting Procedure, RFC 950, Network Information Center, SRI International, Menlo Park,
Calif., August 1985.
V. Fuller, T. Li, J. Yu, K. Varadhan, Classless Inter-Domain Routing (CIDR): an Address Assignment and Aggregation Strategy, RFC 1519,
Network Information Center, SRI International, Menlo Park, Calif., September 1993.
T. Pummill, B. Manning, Variable Length Subnet Table For IPv4, RFC 1878, Network Information Center, SRI International, Menlo Park, Calif.,
December 1995.
NOTES
/etc/inet/netmasks is the official SVr4 name of the netmasks file. The symbolic link /etc/netmasks exists for BSD compatibility.
SunOS 5.10 7 Jan 1997 netmasks(4)