F5 Big-IP NAT session reset
有時在測試的時候 覺得修改好的NAT設定, 不是預期的效果, 好大機會是還未生效 tmsh show /sys connection 注意, 如果在production裏刪除session有可能用戶會發生連接中斷, 登入了的網站需要重新登入 tmsh delete /sys connection 或...
F5 BIG-IP NAT load balancer
預設路由10.0.0.254 設定2個SNAT 設定2個Pool, 留意優先次序 when CLIENT_ACCEPTED { if { [IP::addr [LB::server addr] equals "8.8.8.8"] } { pool Pool_10 snatpool SNAT_10 }...
F5 BIG-IP interface show UNINITIALIZED
如圖看到Interface全部都是UNINITIALIZED 按Create 看情怳選擇, 我是用Routed Mode 新増2個vLan, 我這個案例是沒有使用vLan Tag, Tag 4094和4093不是802.11的vLan Tag, 只是F5的一個記號, 隨便打就可以 2個Interfa...
Posted inCisco
EIGRP Metric 計算
以下為預設value K1 = K3 = 1 K2 = K4 = K5 = 0 Metric公式 Metric = 256*((K1*Scaled Bw) + (K2*Scaled Bw)/(256 – Load) + (K3*Scaled Delay)*(K5/(Reliability + K4)...
Posted inCisco
EIGRP offset-list
現在PC2到PC1的路經: PC2 -> R2 -> R1 -> PC1 利用eigrp的offset-list更改路由, PC2 -> R2 -> R3 -> R1 -> PC1 PC1 ip 10.1.1.10/24 10.1.1.1 PC2 ip 20...
Ubuntu GNS3 Wireshark Permission denied
Couldn't run /usr/bin/dumpcap in child process: Permission denied sudo dpkg-reconfigure wireshark-common Yes sudo chmod +x /usr/bin/dumpcap
Posted inCisco
Cisco Policy Based Routing(PBR)
PC1: 10.0.0.1 Server1: 192.168.5.1 (config)#access-list 100 permit ip host 10.0.0.1 host 192.168.5.1 (config)#route-map PC1toServer1 permit (config-ro...
Posted inLinux
Bind9 DDNS Ubuntu 22.04
以下設定在DDNS的Server apt install bind9 建立一個 ddns 帳號 tsig-keygen -a hmac-sha512 ddns >> /tmp/ddns.key cat /tmp/ddns.key key "ddns" { algorithm hmac-s...