Take a look at this & advice me...
[root@xxxxxxxxx root]# 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 -- anywhere anywhere
udp spts:bootps:bootpc dpts:bootps:bootpc
ACCEPT udp -- anywhere anywhere
udp spts:bootps:bootpc dpts:bootps:bootpc
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
[root@xxxxxxxxx root]#
Thanks, -Mike.
From: Venkatesh Krishnamurthi <vk@xxxxxxxxx> Reply-To: redhat-devel-list@xxxxxxxxxx To: redhat-devel-list@xxxxxxxxxx Subject: Re: udp port 69 (tftp) unreachable Date: Wed, 7 May 2003 11:12:28 -0700 (PDT)
Hi,
Do you have the firewall enabled? What does "iptables -L" show?
Venkatesh
>
> Hi,
>
> When I do tftp from my TFTP client (Target board running YAMON) it fails.
> The TFTP server is configured on a stand-alone PC running RH Linux 9.
>
>
> Info. about the protocols on the Host PC:
> ---------------------------------
>
> [root@xxxxxxxxx root]# lsof -c x -a -i
> COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
> xinetd 1757 root 5u IPv4 2205 TCP localhost.localdomain:1025 (LISTEN)
> xinetd 1757 root 6u IPv4 2208 UDP *:tftp
>
>
>
> Captured using $ tcpdump -n (while tftp client was actively trying)
> -----------------------
> 20:56:40.615815 arp who-has 4.42.102.5 tell 4.42.102.6
> 20:56:40.615890 arp reply 4.42.102.5 is-at 0:e0:98:9e:84:96
> 20:56:40.622048 4.42.102.6.1040 > 4.42.102.5.tftp: 20 RRQ "vmlinux.rec" (DF)
> 20:56:40.622112 4.42.102.5 > 4.42.102.6: icmp: 4.42.102.5 udp port tftp
> unreachable [tos 0xc0]
> 20:56:41.699926 4.42.102.6.1040 > 4.42.102.5.tftp: 20 RRQ "vmlinux.rec" (DF)
> 20:56:41.700006 4.42.102.5 > 4.42.102.6: icmp: 4.42.102.5 udp port tftp
> unreachable [tos 0xc0]
>
> Please tell me why the PC host running tftp server is replying udp port tftp
> unreachable?
>
> Could this be firewall issue? The RH linux 9 installation is new & its at
> home.
>
> Both hosts.allow and hosts.deny files under /etc
> are empty.
>
> Please tell me what other issue this might be or a procedure to debug this
> further.
>
> Thanks,
> -Mike.
>
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