I just did a fresh install of centos 5.0 from cd, followed by yum update which installed 399 packages. No failures or errors that I can see.

I have three nics in the box, but am only setting up one at the moment.

The box can ping others in my network, but if I try ssh, telnet, ftp, etc I get this:

[root@cm network-scripts]# ftp watchdog ftp: connect: No route to host ftp>

[root@cm sysconfig]# ftp 172.17.2.242 ftp: connect: No route to host

root@cm network-scripts]# telnet watchdog Trying 172.17.2.242... telnet: connect to address 172.17.2.242: No route to host telnet: Unable to connect to remote host: No route to host

[root@cm network-scripts]# ssh -l campbell watchdog ssh: connect to host watchdog port 22: No route to host

The weird part is I can do this:

[root@cm network-scripts]# ping watchdog PING watchdog (172.17.2.242) 56(84) bytes of data. 64 bytes from watchdog (172.17.2.242): icmp_seq=1 ttl=64 time=0.170 ms 64 bytes from watchdog (172.17.2.242): icmp_seq=2 ttl=64 time=0.145 ms 64 bytes from watchdog (172.17.2.242): icmp_seq=3 ttl=64 time=0.135 ms

--- watchdog ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 1998ms rtt min/avg/max/mdev = 0.135/0.150/0.170/0.014 ms

[root@cm network-scripts]# arp watchdog Address HWtype HWaddress Flags Mask Iface watchdog ether 00:16:76:D1:67:F2 C eth0

and I can do this: [root@cm sysconfig]# ssh -l campbell cs1 campbell@cs1's password: .................... and it will connect fine.

output of netstat -rn:

[root@cm network-scripts]# netstat -rn Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 172.17.2.0 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 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 0.0.0.0 172.17.2.1 0.0.0.0 UG 0 0 0 eth0

output of netstat -r:

[root@cm network-scripts]# netstat -r Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 172.17.2.0 * 255.255.255.0 U 0 0 0 eth0 192.168.122.0 * 255.255.255.0 U 0 0 0 virbr0 169.254.0.0 * 255.255.0.0 U 0 0 0 eth0 default gateway 0.0.0.0 UG 0 0 0 eth0

output of route:

[root@cm network-scripts]# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 172.17.2.0 * 255.255.255.0 U 0 0 0 eth0 192.168.122.0 * 255.255.255.0 U 0 0 0 virbr0 169.254.0.0 * 255.255.0.0 U 0 0 0 eth0 default gateway 0.0.0.0 UG 0 0 0 eth0

here are the relevant files as far as I know:

/etc/hosts [root@cm network-scripts]# more /etc/hosts # Do not remove the following line, or various programs # that require network functionality will fail. 127.0.0.1 localhost.localdomain localhost ::1 localhost6.localdomain6 localhost6 172.17.2.1 gateway gateway.inexs.com 172.17.2.50 cm cm.inexs.com #172.17.2.52 cm2 cm2.inexs.com 172.17.2.51 cs1 cs1.inexs.com #172.17.2.53 cs2 cs2.inexs.com 172.17.2.137 ingrid ingrid.inexs.com 172.17.2.161 vail vail.inexs.com 172.17.2.162 beaver beaver.inexs.com 172.17.2.175 plotting plotting.inexs.com 172.17.2.242 watchdog watchdog.inexs.com

/etc/sysconfig/network-scripts/ifcfg-eth0 [root@cm network-scripts]# more ifcfg-eth0 # Broadcom Corporation NetXtreme BCM5704 Gigabit Ethernet DEVICE=eth0 BOOTPROTO=none BROADCAST=172.17.2.255 HWADDR=00:e0:81:2c:73:86 ONBOOT=yes DHCP_HOSTNAME=cm TYPE=Ethernet IPADDR=172.17.2.50 NETMASK=255.255.255.0 NETWORK=172.17.2.0 GATEWAY=172.17.2.1 USERCTL=yes IPV6INIT=no PEERDNS=no PEERNTP=no

/etc/sysconfig/network-scripts/ifcfg-lo [root@cm network-scripts]# more ifcfg-lo DEVICE=lo IPADDR=127.0.0.1 NETMASK=255.0.0.0 NETWORK=127.0.0.0 # If you're having problems with gated making 127.0.0.0/8 a martian, # you can change this to something else (255.255.255.255, for example) #BROADCAST=127.255.255.255 BROADCAST=255.255.255.255 ONBOOT=yes NAME=loopback

output of ifconfig -a: eth0 Link encap:Ethernet HWaddr 00:E0:81:2C:73:86 inet addr:172.17.2.50 Bcast:172.17.2.255 Mask:255.255.255.0 inet6 addr: fe80::2e0:81ff:fe2c:7386/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:27358 errors:0 dropped:0 overruns:0 frame:0 TX packets:4252 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2338646 (2.2 MiB) TX bytes:620434 (605.8 KiB)

eth1 Link encap:Ethernet HWaddr 00:E0:81:2C:73:87 BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) Interrupt:19

eth2 Link encap:Ethernet HWaddr 00:E0:81:2C:74:33 BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

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:1828 errors:0 dropped:0 overruns:0 frame:0 TX packets:1828 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2737876 (2.6 MiB) TX bytes:2737876 (2.6 MiB)

peth0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:27358 errors:0 dropped:0 overruns:0 frame:0 TX packets:4255 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2448018 (2.3 MiB) TX bytes:640420 (625.4 KiB) Interrupt:18

sit0 Link encap:IPv6-in-IPv4 NOARP MTU:1480 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

veth1 Link encap:Ethernet HWaddr 00:00:00:00:00:00 BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

veth2 Link encap:Ethernet HWaddr 00:00:00:00:00:00 BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

veth3 Link encap:Ethernet HWaddr 00:00:00:00:00:00 BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

vif0.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:4252 errors:0 dropped:0 overruns:0 frame:0 TX packets:27358 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:620434 (605.8 KiB) TX bytes:2338646 (2.2 MiB)

vif0.1 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

vif0.2 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

vif0.3 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) vif0.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:4252 errors:0 dropped:0 overruns:0 frame:0 TX packets:27358 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:620434 (605.8 KiB) TX bytes:2338646 (2.2 MiB)

vif0.1 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

vif0.2 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

vif0.3 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

virbr0 Link encap:Ethernet HWaddr 00:00:00:00:00:00 inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:40 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:8674 (8.4 KiB)

xenbr0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:21327 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1523795 (1.4 MiB) TX bytes:0 (0.0 b)

/etc/sysconfig/network [root@cm sysconfig]# more network NETWORKING=yes NETWORKING_IPV6=no HOSTNAME=cm

/etc/resolv.conf [root@cm sysconfig]# more /etc/resolv.conf nameserver 216.201.128.10 nameserver 66.196.216.10

/etc/sysconfig/iptables [root@cm sysconfig]# more iptables # Firewall configuration written by system-config-securitylevel # Manual customization of this file is not recommended. *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :RH-Firewall-1-INPUT - [0:0] -A INPUT -j RH-Firewall-1-INPUT -A FORWARD -j RH-Firewall-1-INPUT -A RH-Firewall-1-INPUT -i lo -j ACCEPT -A RH-Firewall-1-INPUT -p icmp --icmp-type any -j ACCEPT -A RH-Firewall-1-INPUT -p 50 -j ACCEPT -A RH-Firewall-1-INPUT -p 51 -j ACCEPT -A RH-Firewall-1-INPUT -p udp --dport 5353 -d 224.0.0.251 -j ACCEPT -A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 631 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 21 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 25 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 2049 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 137 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 138 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 139 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 445 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 23 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited COMMIT