ADSL问题请教
按说明配置好ADSL之后，能看到本地IP，能Ping通网关，也能Ping通其它IP，但是其它的啥服务都用不了，是怎么回事？有人遇到过么？SSH到IP失败，FTP到IP失败，telnet 到IP的80端口失败，都是提示timeout
adsl-status 信息
[root@alfa alfa]# /sbin/adsl-status
adsl-status: Link is up and running on interface ppp0
ppp0 Link encap:Point-to-Point Protocol
inet addr:221.223.97.18P-t-P:221.223.96.1Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICASTMTU:1492Metric:1
RX packets:17 errors:0 dropped:0 overruns:0 frame:0
TX packets:14 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3
RX bytes:1162 (1.1 KiB)TX bytes:689 (689.0 b)
ifconfig
[root@alfa network-scripts]# /sbin/ifconfig
eth0 Link encap:EthernetHWaddr 00:00:E8:AE:14:5B
inet addr:192.168.0.2Bcast:192.168.0.2Mask:255.255.255.255
inet6 addr: fe80::200:e8ff:feae:145b/64 Scope:Link
UP BROADCAST RUNNING MULTICASTMTU:1500Metric:1
RX packets:1815 errors:0 dropped:0 overruns:0 frame:236
TX packets:849 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:352137 (343.8 KiB)TX bytes:51202 (50.0 KiB)
Interrupt:217 Base address:0xe000
lo Link encap:Local Loopback
inet addr:127.0.0.1Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNINGMTU:16436Metric:1
RX packets:1662 errors:0 dropped:0 overruns:0 frame:0
TX packets:1662 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1924588 (1.8 MiB)TX bytes:1924588 (1.8 MiB)
ppp0 Link encap:Point-to-Point Protocol
inet addr:221.223.96.192P-t-P:221.223.96.1Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICASTMTU:1492Metric:1
RX packets:918 errors:0 dropped:0 overruns:0 frame:0
TX packets:417 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3
RX bytes:108031 (105.4 KiB)TX bytes:17234 (16.8 KiB)
网关信息
[root@alfa network-scripts]# netstat -nr
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
221.223.96.1 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 221.223.96.1 0.0.0.0 UG 0 0 0 ppp0
DNS
[root@alfa alfa]# cat /etc/resolv.conf
# MADE-BY-RP-PPPOE
nameserver 202.106.46.151 [color=red]网关分配的[/color]
nameserver 202.106.0.20[color=red]我一直用的DNS[/color]
ping 网关
PING 221.223.96.1 (221.223.96.1) 56(84) bytes of data.
64 bytes from 221.223.96.1: icmp_seq=0 ttl=255 time=11.7 ms
wrong data byte #22 should be 0x16 but was 0x0
#16 10 11 12 13 14 15 0 87 36 99 0 87 36 99 0 87 36 99 0 87 36 99 16 17 18 19 16 17 18 19 16 17
#48 18 19 95 ea 0 0 95 ea
64 bytes from 221.223.96.1: icmp_seq=1 ttl=255 time=20.5 ms
wrong data byte #22 should be 0x16 but was 0x0
#16 10 11 12 13 14 15 0 0 e8 ae 0 0 e8 ae 0 0 e8 ae 16 17 18 15 16 17 18 19 16 17 18 19 16 17
#48 18 19 14 5b 0 e0 14 5b
64 bytes from 221.223.96.1: icmp_seq=2 ttl=255 time=20.0 ms
wrong data byte #22 should be 0x16 but was 0xb6
#16 10 11 12 13 14 15 b6 21 0 0 b6 21 0 0 b6 21 0 0 16 17 18 15 16 17 18 19 16 17 18 19 16 17
#48 18 19 0 0 70 2 0 0
64 bytes from 221.223.96.1: icmp_seq=3 ttl=255 time=19.8 ms
wrong data byte #22 should be 0x16 but was 0x0
#16 10 11 12 13 14 15 0 0 68 11 0 0 68 11 0 0 68 11 16 17 18 15 16 17 18 19 16 17 18 19 16 17
#48 18 19 42 18 58 49 42 18
--- 221.223.96.1 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3003ms
rtt min/avg/max/mdev = 11.788/18.049/20.521/3.623 ms, pipe 2 能 ping 通你要 ssh 的 IP 不？ 能 ping 通你要 ssh 的 IP 不？
可以Ping通，机器肯定是开着的，
OS:CentOS 4.2 x86_64
rp-ppoe:3.5.22 确定对方开着SSH服务吗? 确定对方的防火墙允许SSH连接吗?
确定自己的防火墙允许对外连接SSH端口吗?
iptables -L
看看. 确定对方开着SSH服务吗? 确定对方的防火墙允许SSH连接吗?
确定自己的防火墙允许对外连接SSH端口吗?
iptables -L
看看.
SSH肯定是开着的，在WINXP下面能正常登陆
iptables -L
[root@alfa alfa]# /sbin/iptables -nL
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
修改一下 ppp0 设备的 MTU 值，改为 1452 试试呢。 修改一下 ppp0 设备的 MTU 值，改为 1452 试试呢。
在哪儿改？能说的更详细一点儿么？ ifconfig ppp0 mtu 1452
页:
[1]