ethernet connection to my college LAN
Andrew Kelly
akelly at transparency.org
Fri Mar 26 09:08:51 UTC 2004
This is embarrassing, but can you please repeat what the original
problem was. I've been debugging a postgres/php app for a few days and
I've completely lost track of what we're trying to solve.
Thanks.
Andy (and forgive the top post)
On Thu, 2004-03-25 at 17:14, shatam bhattacharya wrote:
> Thanks for the suggestion. I think the following information may be of
> interest for this problem:
> my ip 172.31.65.21
> 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
>
>
>
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