HELP NEEDED ethernet connection to my college LAN

[shatam bhattacharya]

Thanks for the suggestion Andy. I think the following information may be of interest for this problem:
my ip  172.31.65.21 (local)
my proxy servers ip & proxy 172.31.100.6:3128
                                          172.31.100.8:3128
my subnet mask 255.255.255.0
 
Please take a look at the output of 
iptables -L 
 

Chain INPUT (policy ACCEPT) target prot opt source               destination         
RH-Lokkit-0-50-INPUT  all  --  anywhere             anywhere           

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         
RH-Lokkit-0-50-INPUT  all  --  anywhere             anywhere           

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         

Chain RH-Lokkit-0-50-INPUT (2 references)
target     prot opt source               destination         
ACCEPT     udp  --  172.31.100.8         anywhere           udp spt:domain dpts:1025:65535 
ACCEPT     udp  --  172.31.100.6      &nbs! p;  anywhere           udp spt:domain dpts:1025:65535 
ACCEPT     tcp  --  anywhere             anywhere           tcp dpt:smtp flags:SYN,RST,ACK/SYN 
ACCEPT     tcp  --  anywhere             anywhere           tcp dpt:h! ttp flags:SYN,RST,ACK/SYN 
ACCEPT     tcp  --  anywhere             anywhere           tcp dpt:ftp flags:SYN,RST,ACK/SYN 
ACCEPT     tcp  --  anywhere             anywhere           tcp dpt:ssh flags:SYN,RST,ACK/SYN 
ACCEPT     tcp  --  anywhere             anywhere           tcp dpt:telnet flags:SYN,RST,ACK/SYN 
ACCEPT     udp  --  anywhere             anywhere           udp spts:bootps:bootpc dpts:bootps:bootpc 
ACCEPT     udp  --  anywh! ere             anywhere           udp spts:bootps:bootpc dpts:bootps:bootpc 
ACCEPT     all  --  anywhere             anywhere           
ACCEPT     all  --  anywhere             anywhere           
REJECT     tcp  --  anywhere             anywhere           tcp dpts:0:1023 flags:SYN,RST,ACK/SYN reject-with icmp-port-unreachable 
REJECT     tcp  --  anywhere             anywhere           tcp dpt:nfs flags:SYN,RST,ACK/SYN reject-with icmp-port-unreachable 
REJECT     udp  --  anywhere             anywhere           udp dpts:0:1023 reject-with icmp-port-unreachable 
REJECT     udp  --  anywhere             anywhere           udp dpt:nfs reject-with icmp-port-unreachable 
REJECT     tcp  --  anywhere             anywhere           tcp dpts:x11:6009 flags:SYN,RST,ACK/SYN reject-with icmp-port-unreachable 
REJECT     tcp  --  anywhere             anywhere           tcp dpt:xfs flags:SYN,RST,ACK/SYN reject-with icmp-port-unreachable 
 

Please suggest what is to be done...
shatam
On Thu, 2004-03-25 at 11:32, shatam bhattacharya wrote:
> Thanks Rick for the advice but the problem persits the following were
> the results
> >The odds are that you don't have the default route set up. Do
> >"netstat -rn" and verify that you have a line that has "0.0.0.0" >in
> the
> >first column.
> 
> 
> Netstat -rn
> 
> Kernel IP routing table
> 
> Destination Gateway Genmask Flags MSS Window irtt Iface
> 
> 172.31.64.0 0.0.0.0 255.255.252.0 U 0 0 0 eth0
> 
> 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
> 
> 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
> 
> 0.0.0.0 172.31.65.21 0.0.0.0 UG 0 0 0 eth0
> 
> 
> 
> >The default route is normally contained in the /etc/sysconfig/network
> >file as the "GATEWAY=" ! equate. Here's an example:
> >NETWORKING=yes
> >HOSTNAME=prophead.corp.publichost.com
> >GATEWAY=192.168.0.1
> >If you don't have a default route, you can add one using this
> command:
> >route add -default gw ip-addr-of-your-gateway
> >For example, to set up the default route as if it were in the network
> >file:
> >route add -default gw 192.168.0.1
> 
> 
> contents of /etc/syconfig/network
> 
> NETWORKING=yes
> 
> HOSTNAME=ginie
> 
> GATEWAY=172.31.65.21
> 
> 
> 
> By the way while installing rhl 9 I had installed 
> 
> http server, dns, smb and nfs. Can they affect the ethernet connection
> even remotely ???

This is starting to sound like a firewall issue, innit?

What's the output of 'iptables -L'?
If you get an error because iptables isn't running, make sure that
that ugly chains crud is! n't in the way by running 'lokkit' and taking
appropriate steps.

Andy
 
On Thu, 2004-03-25 at 11:32, shatam bhattacharya wrote:
> Thanks Rick for the advice but the problem persits the following were
> the results
> >The odds are that you don't have the default route set up. Do
> >"netstat -rn" and verify that you have a line that has "0.0.0.0" >in
> the
> >first column.
> 
> 
> Netstat -rn
> 
> Kernel IP routing table
> 
> Destination Gateway Genmask Flags MSS Window irtt Iface
> 
> 172.31.64.0 0.0.0.0 255.255.252.0 U 0 0 0 eth0
> 
> 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
> 
> 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
> 
> 0.0.0.0 172.31.65.21 0.0.0.0 UG 0 0 0 eth0
> 
> 
> 
> >The default route is normally contained in the /etc/sysconfig/network
> >file as the "GATEWAY=" ! equate. Here's an example:
> >NETWORKING=yes
> >HOSTNAME=prophead.corp.publichost.com
> >GATEWAY=192.168.0.1
> >If you don't have a default route, you can add one using this
> command:
> >route add -default gw ip-addr-of-your-gateway
> >For example, to set up the default route as if it were in the network
> >file:
> >route add -default gw 192.168.0.1
> 
> 
> contents of /etc/syconfig/network
> 
> NETWORKING=yes
> 
> HOSTNAME=ginie
> 
> GATEWAY=172.31.65.21
> 
> 
> 
> By the way while installing rhl 9 I had installed 
> 
> http server, dns, smb and nfs. Can they affect the ethernet connection
> even remotely ???

This is starting to sound like a firewall issue, innit?

What's the output of 'iptables -L'?
If you get an error because iptables isn't running, make sure that
that ugly chains crud is! n't in the way by running 'lokkit' and taking
appropriate steps.

Andy
 


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