Re: Networking problem

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Saturday, May 14, 2011 10:46:51 AM JD wrote:
> On 05/14/11 09:17, Rick Sewill wrote:
> > On Saturday, May 14, 2011 09:27:55 AM JD wrote:
> >> On 05/14/11 08:48, G.Wolfe Woodbury wrote:
> >>> On 05/14/2011 09:36 AM, JD wrote:
> >>>> On my F14, I am running a firewall that accepts specific connection on
> >>>> specific ports from some machines on the LAN.
> >>>> 
> >>>> However, for one machine I made a general rule to accept all
> >>>> connections:
> >>>> 
> >>>> -A INPUT -s 192.168.1.60 -j ACCEPT
> >>>> 
> >>>> After restarting the firewall,
> >>>> 
> >>>> I still am unable to ping that machine and it is unable to ping me.
> >>>> That machine is not running a firewall.
> >>>> 
> >>>> I can ping the router and another machine I have on the LAN.
> >>>> The machine at 192.168.1.60 can do the same.
> >>>> 
> >>>> What else do I need to do to be able to talk to machine 192.168.1.60
> >>>> and it to my fedora machine?
> >>> 
> >>> Try:
> >>> 
> >>> -A INPUT -s 192.168.1.60/32 -j ACCEPT
> >>> 
> >>> there needs to be a netmask in the syntax.
> >> 
> >> Tried it.
> >> Did not change anything :(
> > 
> > Could we see more of the network topology please?
> > 
> > Can you do on both machines:
> > /bin/netstat -rn
> 
> On Fedora Machine:
> # /bin/netstat -rn
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags   MSS Window  irtt
> Iface
> 10.0.0.0        0.0.0.0         255.255.255.0   U         0 0          0
> eth0
> 192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0
> wlan0
> 10.1.1.0        0.0.0.0         255.255.255.0   U         0 0          0
> eth0
> 192.168.122.0   0.0.0.0         255.255.255.0   U         0 0          0
> virbr0
> 0.0.0.0         192.168.1.254   0.0.0.0         UG        0 0          0
> wlan0
> 
> 
> On the machine in question (192.168.1.60)
> # /sbin/netstat -rn
> Routing tables
> 
> Internet:
> Destination        Gateway            Flags    Refs      Use  Netif Expire
> default            192.168.1.254      UGSc        8        0    en1
> 127                127.0.0.1          UCS         0        0    lo0
> 127.0.0.1          127.0.0.1          UH          0        4    lo0
> 169.254            link#6             UCS         0        0    en1
> 192.168.1          link#6             UCS         2        0    en1
> 192.168.1.1        0:26:18:6:ef:7     UHLW        0      113    en1    566
> 192.168.1.60       127.0.0.1          UHS         0        0    lo0
> 192.168.1.254      0:1d:5a:c8:91:c1   UHLW       15      153    en1    565
> 
> Internet6:
> Destination                             Gateway
> Flags      Netif Expire
> 
> ::1                                     link#1
> 
> UHL         lo0
> fe80::%lo0/64                           fe80::1%lo0
> Uc          lo0
> fe80::1%lo0                             link#1
> UHL         lo0
> ff01::/32                               ::1
> U           lo0
> ff02::/32                               fe80::1%lo0
> UC          lo0
> 
> > /sbin/ifconfig
> 
> On Fedora machine:
> 
> # /sbin/ifconfig
> eth0      Link encap:Ethernet  HWaddr 00:03:0D:15:2B:9E
>            inet addr:10.1.1.1  Bcast:10.1.1.255  Mask:255.255.255.0
>            inet6 addr: fe80::203:dff:fe15:2b9e/64 Scope:Link
>            UP BROADCAST MULTICAST  MTU:1500  Metric:1
>            RX packets:1340 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:849 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:1000
>            RX bytes:174589 (170.4 KiB)  TX bytes:418153 (408.3 KiB)
>            Interrupt:19 Base address:0xd800
> 
> eth0:0    Link encap:Ethernet  HWaddr 00:03:0D:15:2B:9E
>            inet addr:10.0.0.1  Bcast:10.0.0.255  Mask:255.255.255.0
>            UP BROADCAST MULTICAST  MTU:1500  Metric:1
>            Interrupt:19 Base address:0xd800
> 
> lo        Link encap:Local Loopback
>            inet addr:127.0.0.1  Mask:255.0.0.0
>            inet6 addr: ::1/128 Scope:Host
>            UP LOOPBACK RUNNING  MTU:16436  Metric:1
>            RX packets:4734603 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:4734603 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:0
>            RX bytes:373719874 (356.4 MiB)  TX bytes:373719874 (356.4 MiB)
> 
> virbr0    Link encap:Ethernet  HWaddr 22:3E:A6:BB:CD:51
>            inet addr:192.168.122.1  Bcast:192.168.122.255
> Mask:255.255.255.0
>            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:8391 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:0
>            RX bytes:0 (0.0 b)  TX bytes:1617830 (1.5 MiB)
> 
> wlan0     Link encap:Ethernet  HWaddr 00:34:56:00:03:43
>            inet6 addr: fe80::234:56ff:fe00:343/64 Scope:Link
>            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>            RX packets:4976669 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:4947232 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:1000
>            RX bytes:1062494718 (1013.2 MiB)  TX bytes:500756007 (477.5 MiB)
> 
> wlan0:0   Link encap:Ethernet  HWaddr 00:34:56:00:03:43
>            inet addr:192.168.1.108  Bcast:192.168.1.255  Mask:255.255.255.0
>            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> 
> On 192.168.1.60:
> # /sbin/ifconfig
> lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
>      inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
>      inet 127.0.0.1 netmask 0xff000000
>      inet6 ::1 prefixlen 128
> gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
> stf0: flags=0<> mtu 1280
> en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>      ether 00:11:24:7e:2d:c8
>      media: autoselect (none) status: inactive
>      supported media: none autoselect 10baseT/UTP <half-duplex>
> 10baseT/UTP <full-duplex> 10baseT/UTP <full-duplex,flow-control>
> 10baseT/UTP <full-duplex,hw-loopback> 100baseTX <half-duplex> 100baseTX
> <full-duplex> 100baseTX <full-duplex,flow-control> 100baseTX
> <full-duplex,hw-loopback> 1000baseT <full-duplex> 1000baseT
> <full-duplex,flow-control> 1000baseT <full-duplex,hw-loopback>
> fw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 4078
>      lladdr 00:11:24:ff:fe:7e:2d:c8
>      media: autoselect <full-duplex> status: inactive
>      supported media: autoselect <full-duplex>
> en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>      inet 192.168.1.70 netmask 0xffffff00 broadcast 192.168.1.255
>      ether 00:11:24:92:bc:e0
>      media: autoselect status: active
>      supported media: autoselect
> 
> > If you don't mind, it might be easiest to copy your filewall
> > rules so we can see them.  As root,
> > /sbin/iptables -L -v
> 
> Sorry. I cannot expose my FW settings to a public list because
> they might contain weaknesses that someone could exploit.
> 
> > If you are concerned with security and sharing your public IP address,
> > may I suggest changing the public IP address ranges to something else,
> > like xxx.xxx.xxx.0, yyy.yyy.yyy.0, etc, in the output.
> 
> Actually, I have no public IP addresses in the rules.
> 
> > Another question...if you have multiple ethernet devices,
> > which device is 192.168.1.60 connected to?
> 
> en1 (this is a Powerbook g4 running OS X 10.5.8).

Both Fedora and the Powerbook can ping the default gateway,
192.168.254.1 ?

The Powerbook entries confuse me.
According to the Powerbook netstat -rn, I would expect an interface,
192.168.1.60/some mask

When I look at the Powerbook ifconfig, I see
en1: ... inet 192.168.1.70 netmask 0xffffff00 ...
I expected this entry to read inet 192.168.1.60 netmask 0xffffff00

Can I suggest, for a test, change the iptables filters to allow any
incoming packet from 192.168.1.0/24, and then, try to ping from
the Powerbook.  Also, you might wish to check the ARP table on
Fedora to see what IP address/Mac address entries it knows about.
As root, try /sbin/arp -a
I am interested to know, after the attempted ping from the Powerbook,
what IP address/Mac entry is found, if any, in the Fedora.

-- 
users mailing list
users@xxxxxxxxxxxxxxxxxxxxxxx
To unsubscribe or change subscription options:
https://admin.fedoraproject.org/mailman/listinfo/users
Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines

[Index of Archives]     [Older Fedora Users]     [Fedora Announce]     [Fedora Package Announce]     [EPEL Announce]     [EPEL Devel]     [Fedora Magazine]     [Fedora Summer Coding]     [Fedora Laptop]     [Fedora Cloud]     [Fedora Advisory Board]     [Fedora Education]     [Fedora Security]     [Fedora Scitech]     [Fedora Robotics]     [Fedora Infrastructure]     [Fedora Websites]     [Anaconda Devel]     [Fedora Devel Java]     [Fedora Desktop]     [Fedora Fonts]     [Fedora Marketing]     [Fedora Management Tools]     [Fedora Mentors]     [Fedora Package Review]     [Fedora R Devel]     [Fedora PHP Devel]     [Kickstart]     [Fedora Music]     [Fedora Packaging]     [Fedora SELinux]     [Fedora Legal]     [Fedora Kernel]     [Fedora OCaml]     [Coolkey]     [Virtualization Tools]     [ET Management Tools]     [Yum Users]     [Yosemite News]     [Gnome Users]     [KDE Users]     [Fedora Art]     [Fedora Docs]     [Fedora Sparc]     [Libvirt Users]     [Fedora ARM]

  Powered by Linux