10-30-2007
As porter said that disabling firewall solves the problem of socket connection with the server..as I mentioned in my 1st post....
I had checked what blowtorch said in reply.....in my fedora core 6
but I found that its working correctly....
here is my output ...withour error.....
[root@arun ~]# ping -s 10 192.9.100.113
PING 192.9.100.113 (192.9.100.113) 10(38) bytes of data.
18 bytes from 192.9.100.113: icmp_seq=1 ttl=64 time=5.40 ms
18 bytes from 192.9.100.113: icmp_seq=2 ttl=64 time=0.465 ms
Also i tried for telnet......and here is the output for that....
[root@arun ~]# telnet 192.9.100.113
Trying 192.9.100.113...
telnet: connect to address 192.9.100.113: Connection refused
telnet: Unable to connect to remote host: Connection refused
So why connection refused here.....?????????
can anybody help me????
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Checksum action in tc(8) Linux Checksum action in tc(8)
NAME
csum - checksum update action
SYNOPSIS
tc ... action csum UPDATE
UPDATE := TARGET [ UPDATE ]
TARGET := { ip4h | icmp | igmp | tcp | udp | udplite | sctp | SWEETS }
SWEETS := { and | or | + }
DESCRIPTION
The csum action triggers checksum recalculation of specified packet headers. It is commonly used to fix incorrect checksums after the pedit
action has modified the packet content.
OPTIONS
TARGET Specify which headers to update: IPv4 header (ip4h), ICMP header (icmp), IGMP header (igmp), TCP header (tcp), UDP header (udp),
UDPLite header (udplite) or SCTP header (sctp).
SWEETS These are merely syntactic sugar and ignored internally.
EXAMPLES
The following performs stateless NAT for incoming packets from 192.0.2.100 to new destination 198.51.100.1. Assuming these are UDP packets,
both IP and UDP checksums have to be recalculated:
# tc qdisc add dev eth0 ingress handle ffff:
# tc filter add dev eth0 prio 1 protocol ip parent ffff:
u32 match ip src 192.0.2.100/32 flowid :1
action pedit munge ip dst set 198.51.100.1 pipe
csum ip and udp
SEE ALSO
tc(8), tc-pedit(8)
iproute2 11 Jan 2015 Checksum action in tc(8)